aboutsummaryrefslogtreecommitdiff
path: root/drivers/iio/adc
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2019-03-06 16:29:27 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-06 16:29:27 -0800
commite266ca36da7de45b64b05698e98e04b578a88888 (patch)
treefc9ab60b687a41aedb69c713e239354444259167 /drivers/iio/adc
parente0f0ae838a25464179d37f355d763f9ec139fc15 (diff)
parent1f08c4a54b7cb62ed6450808c37d06c907f1a2dd (diff)
downloadlinux-e266ca36da7de45b64b05698e98e04b578a88888.tar.gz
Merge tag 'staging-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging/IIO updates from Greg KH: "Here is the big staging/iio driver pull request for 5.1-rc1. Lots of good IIO driver updates and cleanups in here as always. Combined with the removal of the xgifb driver, we have a net "loss" of over 9000 lines in the pull request, always a nice thing. As the outreachy application process is currently happening, there are loads of tiny checkpatch cleanup fixes all over the staging tree, which accounts for the majority of the fixups" * tag 'staging-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (341 commits) staging: mt7621-dma: remove license boilerplate text staging: mt7621-dma: add SPDX GPL-2.0+ license identifier Staging: ks7010: Replace typecast to int Staging: vt6655: Align a static function declaration staging: speakup: fix line over 80 characters. staging: mt7621-eth: Remove license boilerplate text staging: mt7621-eth: Add SPDX license identifier staging: ks7010: removed custom Michael MIC implementation. staging: rtl8192e: Fix space and suspect issue Staging: vt6655: Modify comment style of SPDX License Identifier Staging: vt6655: Modify comment style for SPDX-License-Identifier Staging: vt6655: Align a function declaration Staging: vt6655: Alignment of function declaration staging: rtl8712: Fix indentation issue staging: wilc1000: fix incorrent type in initializer staging: rtl8188eu: remove unused P2P_PRIVATE_IOCTL_SET_LEN staging: rtl8188eu: remove unused enum P2P_PROTO_WK_ID staging: rtl8723bs: Remove duplicated include from drv_types.h Staging: vt6655: Alignment should match open parenthesis staging: erofs: fix mis-acted TAIL merging behavior ...
Diffstat (limited to 'drivers/iio/adc')
-rw-r--r--drivers/iio/adc/Kconfig80
-rw-r--r--drivers/iio/adc/Makefile7
-rw-r--r--drivers/iio/adc/ad7476.c20
-rw-r--r--drivers/iio/adc/ad7606.c583
-rw-r--r--drivers/iio/adc/ad7606.h99
-rw-r--r--drivers/iio/adc/ad7606_par.c105
-rw-r--r--drivers/iio/adc/ad7606_spi.c82
-rw-r--r--drivers/iio/adc/ad7768-1.c655
-rw-r--r--drivers/iio/adc/exynos_adc.c19
-rw-r--r--drivers/iio/adc/ingenic-adc.c364
-rw-r--r--drivers/iio/adc/lpc32xx_adc.c15
-rw-r--r--drivers/iio/adc/meson_saradc.c33
-rw-r--r--drivers/iio/adc/npcm_adc.c335
-rw-r--r--drivers/iio/adc/ti-ads124s08.c376
-rw-r--r--drivers/iio/adc/xilinx-xadc-core.c4
15 files changed, 2757 insertions, 20 deletions
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 7a3ca4ec0cb7..5debc67df70a 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -57,18 +57,48 @@ config AD7298
module will be called ad7298.
config AD7476
- tristate "Analog Devices AD7476 and similar 1-channel ADCs driver"
+ tristate "Analog Devices AD7476 1-channel ADCs driver and other similar devices from AD an TI"
depends on SPI
select IIO_BUFFER
select IIO_TRIGGERED_BUFFER
help
- Say yes here to build support for Analog Devices AD7273, AD7274, AD7276,
- AD7277, AD7278, AD7475, AD7476, AD7477, AD7478, AD7466, AD7467, AD7468,
- AD7495, AD7910, AD7920, AD7920 SPI analog to digital converters (ADC).
+ Say yes here to build support for the following SPI analog to
+ digital converters (ADCs):
+ Analog Devices: AD7273, AD7274, AD7276, AD7277, AD7278, AD7475,
+ AD7476, AD7477, AD7478, AD7466, AD7467, AD7468, AD7495, AD7910,
+ AD7920.
+ Texas Instruments: ADS7866, ADS7867, ADS7868.
To compile this driver as a module, choose M here: the
module will be called ad7476.
+config AD7606
+ tristate
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+
+config AD7606_IFACE_PARALLEL
+ tristate "Analog Devices AD7606 ADC driver with parallel interface support"
+ depends on HAS_IOMEM
+ select AD7606
+ help
+ Say yes here to build parallel interface support for Analog Devices:
+ ad7605-4, ad7606, ad7606-6, ad7606-4 analog to digital converters (ADC).
+
+ To compile this driver as a module, choose M here: the
+ module will be called ad7606_parallel.
+
+config AD7606_IFACE_SPI
+ tristate "Analog Devices AD7606 ADC driver with spi interface support"
+ depends on SPI
+ select AD7606
+ help
+ Say yes here to build spi interface support for Analog Devices:
+ ad7605-4, ad7606, ad7606-6, ad7606-4 analog to digital converters (ADC).
+
+ To compile this driver as a module, choose M here: the
+ module will be called ad7606_spi.
+
config AD7766
tristate "Analog Devices AD7766/AD7767 ADC driver"
depends on SPI_MASTER
@@ -81,6 +111,19 @@ config AD7766
To compile this driver as a module, choose M here: the module will be
called ad7766.
+config AD7768_1
+ tristate "Analog Devices AD7768-1 ADC driver"
+ depends on SPI
+ select IIO_BUFFER
+ select IIO_TRIGGER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say yes here to build support for Analog Devices AD7768-1 SPI
+ simultaneously sampling sigma-delta analog to digital converter (ADC).
+
+ To compile this driver as a module, choose M here: the module will be
+ called ad7768-1.
+
config AD7791
tristate "Analog Devices AD7791 ADC driver"
depends on SPI
@@ -367,6 +410,15 @@ config INA2XX_ADC
Say yes here to build support for TI INA2xx family of Power Monitors.
This driver is mutually exclusive with the HWMON version.
+config INGENIC_ADC
+ tristate "Ingenic JZ47xx SoCs ADC driver"
+ depends on MIPS || COMPILE_TEST
+ help
+ Say yes here to build support for the Ingenic JZ47xx SoCs ADC unit.
+
+ This driver can also be built as a module. If so, the module will be
+ called ingenic_adc.
+
config IMX7D_ADC
tristate "Freescale IMX7D ADC driver"
depends on ARCH_MXC || COMPILE_TEST
@@ -576,6 +628,16 @@ config NAU7802
To compile this driver as a module, choose M here: the
module will be called nau7802.
+config NPCM_ADC
+ tristate "Nuvoton NPCM ADC driver"
+ depends on ARCH_NPCM || COMPILE_TEST
+ depends on HAS_IOMEM
+ help
+ Say yes here to build support for Nuvoton NPCM ADC.
+
+ This driver can also be built as a module. If so, the module
+ will be called npcm_adc.
+
config PALMAS_GPADC
tristate "TI Palmas General Purpose ADC"
depends on MFD_PALMAS
@@ -908,6 +970,16 @@ config TI_ADS8688
This driver can also be built as a module. If so, the module will be
called ti-ads8688.
+config TI_ADS124S08
+ tristate "Texas Instruments ADS124S08"
+ depends on SPI && OF
+ help
+ If you say yes here you get support for Texas Instruments ADS124S08
+ and ADS124S06 ADC chips
+
+ This driver can also be built as a module. If so, the module will be
+ called ti-ads124s08.
+
config TI_AM335X_ADC
tristate "TI's AM335X ADC driver"
depends on MFD_TI_AM335X_TSCADC && HAS_DMA
diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
index 07df37f621bd..d50eb47da484 100644
--- a/drivers/iio/adc/Makefile
+++ b/drivers/iio/adc/Makefile
@@ -11,7 +11,11 @@ obj-$(CONFIG_AD7291) += ad7291.o
obj-$(CONFIG_AD7298) += ad7298.o
obj-$(CONFIG_AD7923) += ad7923.o
obj-$(CONFIG_AD7476) += ad7476.o
+obj-$(CONFIG_AD7606_IFACE_PARALLEL) += ad7606_par.o
+obj-$(CONFIG_AD7606_IFACE_SPI) += ad7606_spi.o
+obj-$(CONFIG_AD7606) += ad7606.o
obj-$(CONFIG_AD7766) += ad7766.o
+obj-$(CONFIG_AD7768_1) += ad7768-1.o
obj-$(CONFIG_AD7791) += ad7791.o
obj-$(CONFIG_AD7793) += ad7793.o
obj-$(CONFIG_AD7887) += ad7887.o
@@ -36,6 +40,7 @@ obj-$(CONFIG_HI8435) += hi8435.o
obj-$(CONFIG_HX711) += hx711.o
obj-$(CONFIG_IMX7D_ADC) += imx7d_adc.o
obj-$(CONFIG_INA2XX_ADC) += ina2xx-adc.o
+obj-$(CONFIG_INGENIC_ADC) += ingenic-adc.o
obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o
obj-$(CONFIG_LPC18XX_ADC) += lpc18xx_adc.o
obj-$(CONFIG_LPC32XX_ADC) += lpc32xx_adc.o
@@ -55,6 +60,7 @@ obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o
obj-$(CONFIG_MESON_SARADC) += meson_saradc.o
obj-$(CONFIG_MXS_LRADC_ADC) += mxs-lradc-adc.o
obj-$(CONFIG_NAU7802) += nau7802.o
+obj-$(CONFIG_NPCM_ADC) += npcm_adc.o
obj-$(CONFIG_PALMAS_GPADC) += palmas_gpadc.o
obj-$(CONFIG_QCOM_SPMI_ADC5) += qcom-spmi-adc5.o
obj-$(CONFIG_QCOM_SPMI_IADC) += qcom-spmi-iadc.o
@@ -81,6 +87,7 @@ obj-$(CONFIG_TI_ADC161S626) += ti-adc161s626.o
obj-$(CONFIG_TI_ADS1015) += ti-ads1015.o
obj-$(CONFIG_TI_ADS7950) += ti-ads7950.o
obj-$(CONFIG_TI_ADS8688) += ti-ads8688.o
+obj-$(CONFIG_TI_ADS124S08) += ti-ads124s08.o
obj-$(CONFIG_TI_AM335X_ADC) += ti_am335x_adc.o
obj-$(CONFIG_TI_TLC4541) += ti-tlc4541.o
obj-$(CONFIG_TWL4030_MADC) += twl4030-madc.o
diff --git a/drivers/iio/adc/ad7476.c b/drivers/iio/adc/ad7476.c
index 0549686b9ef8..76747488044b 100644
--- a/drivers/iio/adc/ad7476.c
+++ b/drivers/iio/adc/ad7476.c
@@ -59,6 +59,9 @@ enum ad7476_supported_device_ids {
ID_ADC081S,
ID_ADC101S,
ID_ADC121S,
+ ID_ADS7866,
+ ID_ADS7867,
+ ID_ADS7868,
};
static irqreturn_t ad7476_trigger_handler(int irq, void *p)
@@ -157,6 +160,8 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
#define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits), \
BIT(IIO_CHAN_INFO_RAW))
#define AD7091R_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), 0)
+#define ADS786X_CHAN(bits) _AD7476_CHAN((bits), 12 - (bits), \
+ BIT(IIO_CHAN_INFO_RAW))
static const struct ad7476_chip_info ad7476_chip_info_tbl[] = {
[ID_AD7091R] = {
@@ -209,6 +214,18 @@ static const struct ad7476_chip_info ad7476_chip_info_tbl[] = {
.channel[0] = ADC081S_CHAN(12),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
+ [ID_ADS7866] = {
+ .channel[0] = ADS786X_CHAN(12),
+ .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+ },
+ [ID_ADS7867] = {
+ .channel[0] = ADS786X_CHAN(10),
+ .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+ },
+ [ID_ADS7868] = {
+ .channel[0] = ADS786X_CHAN(8),
+ .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+ },
};
static const struct iio_info ad7476_info = {
@@ -314,6 +331,9 @@ static const struct spi_device_id ad7476_id[] = {
{"adc081s", ID_ADC081S},
{"adc101s", ID_ADC101S},
{"adc121s", ID_ADC121S},
+ {"ads7866", ID_ADS7866},
+ {"ads7867", ID_ADS7867},
+ {"ads7868", ID_ADS7868},
{}
};
MODULE_DEVICE_TABLE(spi, ad7476_id);
diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
new file mode 100644
index 000000000000..ebb8de03bbce
--- /dev/null
+++ b/drivers/iio/adc/ad7606.c
@@ -0,0 +1,583 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AD7606 SPI ADC driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/util_macros.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+
+#include "ad7606.h"
+
+/*
+ * Scales are computed as 5000/32768 and 10000/32768 respectively,
+ * so that when applied to the raw values they provide mV values
+ */
+static const unsigned int scale_avail[2] = {
+ 152588, 305176
+};
+
+static const unsigned int ad7606_oversampling_avail[7] = {
+ 1, 2, 4, 8, 16, 32, 64,
+};
+
+static int ad7606_reset(struct ad7606_state *st)
+{
+ if (st->gpio_reset) {
+ gpiod_set_value(st->gpio_reset, 1);
+ ndelay(100); /* t_reset >= 100ns */
+ gpiod_set_value(st->gpio_reset, 0);
+ return 0;
+ }
+
+ return -ENODEV;
+}
+
+static int ad7606_read_samples(struct ad7606_state *st)
+{
+ unsigned int num = st->chip_info->num_channels;
+ u16 *data = st->data;
+ int ret;
+
+ /*
+ * The frstdata signal is set to high while and after reading the sample
+ * of the first channel and low for all other channels. This can be used
+ * to check that the incoming data is correctly aligned. During normal
+ * operation the data should never become unaligned, but some glitch or
+ * electrostatic discharge might cause an extra read or clock cycle.
+ * Monitoring the frstdata signal allows to recover from such failure
+ * situations.
+ */
+
+ if (st->gpio_frstdata) {
+ ret = st->bops->read_block(st->dev, 1, data);
+ if (ret)
+ return ret;
+
+ if (!gpiod_get_value(st->gpio_frstdata)) {
+ ad7606_reset(st);
+ return -EIO;
+ }
+
+ data++;
+ num--;
+ }
+
+ return st->bops->read_block(st->dev, num, data);
+}
+
+static irqreturn_t ad7606_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct ad7606_state *st = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&st->lock);
+
+ ret = ad7606_read_samples(st);
+ if (ret == 0)
+ iio_push_to_buffers_with_timestamp(indio_dev, st->data,
+ iio_get_time_ns(indio_dev));
+
+ iio_trigger_notify_done(indio_dev->trig);
+ /* The rising edge of the CONVST signal starts a new conversion. */
+ gpiod_set_value(st->gpio_convst, 1);
+
+ mutex_unlock(&st->lock);
+
+ return IRQ_HANDLED;
+}
+
+static int ad7606_scan_direct(struct iio_dev *indio_dev, unsigned int ch)
+{
+ struct ad7606_state *st = iio_priv(indio_dev);
+ int ret;
+
+ gpiod_set_value(st->gpio_convst, 1);
+ ret = wait_for_completion_timeout(&st->completion,
+ msecs_to_jiffies(1000));
+ if (!ret) {
+ ret = -ETIMEDOUT;
+ goto error_ret;
+ }
+
+ ret = ad7606_read_samples(st);
+ if (ret == 0)
+ ret = st->data[ch];
+
+error_ret:
+ gpiod_set_value(st->gpio_convst, 0);
+
+ return ret;
+}
+
+static int ad7606_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long m)
+{
+ int ret;
+ struct ad7606_state *st = iio_priv(indio_dev);
+
+ switch (m) {
+ case IIO_CHAN_INFO_RAW:
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ ret = ad7606_scan_direct(indio_dev, chan->address);
+ iio_device_release_direct_mode(indio_dev);
+
+ if (ret < 0)
+ return ret;
+ *val = (short)ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ *val2 = scale_avail[st->range];
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
+ *val = st->oversampling;
+ return IIO_VAL_INT;
+ }
+ return -EINVAL;
+}
+
+static ssize_t in_voltage_scale_available_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int i, len = 0;
+
+ for (i = 0; i < ARRAY_SIZE(scale_avail); i++)
+ len += scnprintf(buf + len, PAGE_SIZE - len, "0.%06u ",
+ scale_avail[i]);
+
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static IIO_DEVICE_ATTR_RO(in_voltage_scale_available, 0);
+
+static int ad7606_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct ad7606_state *st = iio_priv(indio_dev);
+ DECLARE_BITMAP(values, 3);
+ int i;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ mutex_lock(&st->lock);
+ i = find_closest(val2, scale_avail, ARRAY_SIZE(scale_avail));
+ gpiod_set_value(st->gpio_range, i);
+ st->range = i;
+ mutex_unlock(&st->lock);
+
+ return 0;
+ case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
+ if (val2)
+ return -EINVAL;
+ i = find_closest(val, ad7606_oversampling_avail,
+ ARRAY_SIZE(ad7606_oversampling_avail));
+
+ values[0] = i;
+
+ mutex_lock(&st->lock);
+ gpiod_set_array_value(ARRAY_SIZE(values), st->gpio_os->desc,
+ st->gpio_os->info, values);
+ st->oversampling = ad7606_oversampling_avail[i];
+ mutex_unlock(&st->lock);
+
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static IIO_CONST_ATTR(oversampling_ratio_available, "1 2 4 8 16 32 64");
+
+static struct attribute *ad7606_attributes_os_and_range[] = {
+ &iio_dev_attr_in_voltage_scale_available.dev_attr.attr,
+ &iio_const_attr_oversampling_ratio_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group ad7606_attribute_group_os_and_range = {
+ .attrs = ad7606_attributes_os_and_range,
+};
+
+static struct attribute *ad7606_attributes_os[] = {
+ &iio_const_attr_oversampling_ratio_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group ad7606_attribute_group_os = {
+ .attrs = ad7606_attributes_os,
+};
+
+static struct attribute *ad7606_attributes_range[] = {
+ &iio_dev_attr_in_voltage_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group ad7606_attribute_group_range = {
+ .attrs = ad7606_attributes_range,
+};
+
+#define AD760X_CHANNEL(num, mask) { \
+ .type = IIO_VOLTAGE, \
+ .indexed = 1, \
+ .channel = num, \
+ .address = num, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),\
+ .info_mask_shared_by_all = mask, \
+ .scan_index = num, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_CPU, \
+ }, \
+}
+
+#define AD7605_CHANNEL(num) \
+ AD760X_CHANNEL(num, 0)
+
+#define AD7606_CHANNEL(num) \
+ AD760X_CHANNEL(num, BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO))
+
+static const struct iio_chan_spec ad7605_channels[] = {
+ IIO_CHAN_SOFT_TIMESTAMP(4),
+ AD7605_CHANNEL(0),
+ AD7605_CHANNEL(1),
+ AD7605_CHANNEL(2),
+ AD7605_CHANNEL(3),
+};
+
+static const struct iio_chan_spec ad7606_channels[] = {
+ IIO_CHAN_SOFT_TIMESTAMP(8),
+ AD7606_CHANNEL(0),
+ AD7606_CHANNEL(1),
+ AD7606_CHANNEL(2),
+ AD7606_CHANNEL(3),
+ AD7606_CHANNEL(4),
+ AD7606_CHANNEL(5),
+ AD7606_CHANNEL(6),
+ AD7606_CHANNEL(7),
+};
+
+static const struct ad7606_chip_info ad7606_chip_info_tbl[] = {
+ /* More devices added in future */
+ [ID_AD7605_4] = {
+ .channels = ad7605_channels,
+ .num_channels = 5,
+ },
+ [ID_AD7606_8] = {
+ .channels = ad7606_channels,
+ .num_channels = 9,
+ .has_oversampling = true,
+ },
+ [ID_AD7606_6] = {
+ .channels = ad7606_channels,
+ .num_channels = 7,
+ .has_oversampling = true,
+ },
+ [ID_AD7606_4] = {
+ .channels = ad7606_channels,
+ .num_channels = 5,
+ .has_oversampling = true,
+ },
+};
+
+static int ad7606_request_gpios(struct ad7606_state *st)
+{
+ struct device *dev = st->dev;
+
+ st->gpio_convst = devm_gpiod_get(dev, "adi,conversion-start",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(st->gpio_convst))
+ return PTR_ERR(st->gpio_convst);
+
+ st->gpio_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(st->gpio_reset))
+ return PTR_ERR(st->gpio_reset);
+
+ st->gpio_range = devm_gpiod_get_optional(dev, "adi,range",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(st->gpio_range))
+ return PTR_ERR(st->gpio_range);
+
+ st->gpio_standby = devm_gpiod_get_optional(dev, "standby",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(st->gpio_standby))
+ return PTR_ERR(st->gpio_standby);
+
+ st->gpio_frstdata = devm_gpiod_get_optional(dev, "adi,first-data",
+ GPIOD_IN);
+ if (IS_ERR(st->gpio_frstdata))
+ return PTR_ERR(st->gpio_frstdata);
+
+ if (!st->chip_info->has_oversampling)
+ return 0;
+
+ st->gpio_os = devm_gpiod_get_array_optional(dev,
+ "adi,oversampling-ratio",
+ GPIOD_OUT_LOW);
+ return PTR_ERR_OR_ZERO(st->gpio_os);
+}
+
+/*
+ * The BUSY signal indicates when conversions are in progress, so when a rising
+ * edge of CONVST is applied, BUSY goes logic high and transitions low at the
+ * end of the entire conversion process. The falling edge of the BUSY signal
+ * triggers this interrupt.
+ */
+static irqreturn_t ad7606_interrupt(int irq, void *dev_id)
+{
+ struct iio_dev *indio_dev = dev_id;
+ struct ad7606_state *st = iio_priv(indio_dev);
+
+ if (iio_buffer_enabled(indio_dev)) {
+ gpiod_set_value(st->gpio_convst, 0);
+ iio_trigger_poll_chained(st->trig);
+ } else {
+ complete(&st->completion);
+ }
+
+ return IRQ_HANDLED;
+};
+
+static int ad7606_validate_trigger(struct iio_dev *indio_dev,
+ struct iio_trigger *trig)
+{
+ struct ad7606_state *st = iio_priv(indio_dev);
+
+ if (st->trig != trig)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int ad7606_buffer_postenable(struct iio_dev *indio_dev)
+{
+ struct ad7606_state *st = iio_priv(indio_dev);
+
+ iio_triggered_buffer_postenable(indio_dev);
+ gpiod_set_value(st->gpio_convst, 1);
+
+ return 0;
+}
+
+static int ad7606_buffer_predisable(struct iio_dev *indio_dev)
+{
+ struct ad7606_state *st = iio_priv(indio_dev);
+
+ gpiod_set_value(st->gpio_convst, 0);
+
+ return iio_triggered_buffer_predisable(indio_dev);
+}
+
+static const struct iio_buffer_setup_ops ad7606_buffer_ops = {
+ .postenable = &ad7606_buffer_postenable,
+ .predisable = &ad7606_buffer_predisable,
+};
+
+static const struct iio_info ad7606_info_no_os_or_range = {
+ .read_raw = &ad7606_read_raw,
+ .validate_trigger = &ad7606_validate_trigger,
+};
+
+static const struct iio_info ad7606_info_os_and_range = {
+ .read_raw = &ad7606_read_raw,
+ .write_raw = &ad7606_write_raw,
+ .attrs = &ad7606_attribute_group_os_and_range,
+ .validate_trigger = &ad7606_validate_trigger,
+};
+
+static const struct iio_info ad7606_info_os = {
+ .read_raw = &ad7606_read_raw,
+ .write_raw = &ad7606_write_raw,
+ .attrs = &ad7606_attribute_group_os,
+ .validate_trigger = &ad7606_validate_trigger,
+};
+
+static const struct iio_info ad7606_info_range = {
+ .read_raw = &ad7606_read_raw,
+ .write_raw = &ad7606_write_raw,
+ .attrs = &ad7606_attribute_group_range,
+ .validate_trigger = &ad7606_validate_trigger,
+};
+
+static const struct iio_trigger_ops ad7606_trigger_ops = {
+ .validate_device = iio_trigger_validate_own_device,
+};
+
+static void ad7606_regulator_disable(void *data)
+{
+ struct ad7606_state *st = data;
+
+ regulator_disable(st->reg);
+}
+
+int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
+ const char *name, unsigned int id,
+ const struct ad7606_bus_ops *bops)
+{
+ struct ad7606_state *st;
+ int ret;
+ struct iio_dev *indio_dev;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+ dev_set_drvdata(dev, indio_dev);
+
+ st->dev = dev;
+ mutex_init(&st->lock);
+ st->bops = bops;
+ st->base_address = base_address;
+ /* tied to logic low, analog input range is +/- 5V */
+ st->range = 0;
+ st->oversampling = 1;
+
+ st->reg = devm_regulator_get(dev, "avcc");
+ if (IS_ERR(st->reg))
+ return PTR_ERR(st->reg);
+
+ ret = regulator_enable(st->reg);
+ if (ret) {
+ dev_err(dev, "Failed to enable specified AVcc supply\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(dev, ad7606_regulator_disable, st);
+ if (ret)
+ return ret;
+
+ st->chip_info = &ad7606_chip_info_tbl[id];
+
+ ret = ad7606_request_gpios(st);
+ if (ret)
+ return ret;
+
+ indio_dev->dev.parent = dev;
+ if (st->gpio_os) {
+ if (st->gpio_range)
+ indio_dev->info = &ad7606_info_os_and_range;
+ else
+ indio_dev->info = &ad7606_info_os;
+ } else {
+ if (st->gpio_range)
+ indio_dev->info = &ad7606_info_range;
+ else
+ indio_dev->info = &ad7606_info_no_os_or_range;
+ }
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->name = name;
+ indio_dev->channels = st->chip_info->channels;
+ indio_dev->num_channels = st->chip_info->num_channels;
+
+ init_completion(&st->completion);
+
+ ret = ad7606_reset(st);
+ if (ret)
+ dev_warn(st->dev, "failed to RESET: no RESET GPIO specified\n");
+
+ st->trig = devm_iio_trigger_alloc(dev, "%s-dev%d",
+ indio_dev->name, indio_dev->id);
+ if (!st->trig)
+ return -ENOMEM;
+
+ st->trig->ops = &ad7606_trigger_ops;
+ st->trig->dev.parent = dev;
+ iio_trigger_set_drvdata(st->trig, indio_dev);
+ ret = devm_iio_trigger_register(dev, st->trig);
+ if (ret)
+ return ret;
+
+ indio_dev->trig = iio_trigger_get(st->trig);
+
+ ret = devm_request_threaded_irq(dev, irq,
+ NULL,
+ &ad7606_interrupt,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ name, indio_dev);
+ if (ret)
+ return ret;
+
+ ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
+ &iio_pollfunc_store_time,
+ &ad7606_trigger_handler,
+ &ad7606_buffer_ops);
+ if (ret)
+ return ret;
+
+ return devm_iio_device_register(dev, indio_dev);
+}
+EXPORT_SYMBOL_GPL(ad7606_probe);
+
+#ifdef CONFIG_PM_SLEEP
+
+static int ad7606_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct ad7606_state *st = iio_priv(indio_dev);
+
+ if (st->gpio_standby) {
+ gpiod_set_value(st->gpio_range, 1);
+ gpiod_set_value(st->gpio_standby, 0);
+ }
+
+ return 0;
+}
+
+static int ad7606_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct ad7606_state *st = iio_priv(indio_dev);
+
+ if (st->gpio_standby) {
+ gpiod_set_value(st->gpio_range, st->range);
+ gpiod_set_value(st->gpio_standby, 1);
+ ad7606_reset(st);
+ }
+
+ return 0;
+}
+
+SIMPLE_DEV_PM_OPS(ad7606_pm_ops, ad7606_suspend, ad7606_resume);
+EXPORT_SYMBOL_GPL(ad7606_pm_ops);
+
+#endif
+
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
+MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h
new file mode 100644
index 000000000000..5d12410f68e1
--- /dev/null
+++ b/drivers/iio/adc/ad7606.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * AD7606 ADC driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ */
+
+#ifndef IIO_ADC_AD7606_H_
+#define IIO_ADC_AD7606_H_
+
+/**
+ * struct ad7606_chip_info - chip specific information
+ * @channels: channel specification
+ * @num_channels: number of channels
+ * @has_oversampling: whether the device has oversampling support
+ */
+struct ad7606_chip_info {
+ const struct iio_chan_spec *channels;
+ unsigned int num_channels;
+ bool has_oversampling;
+};
+
+/**
+ * struct ad7606_state - driver instance specific data
+ * @dev pointer to kernel device
+ * @chip_info entry in the table of chips that describes this device
+ * @reg regulator info for the the power supply of the device
+ * @bops bus operations (SPI or parallel)
+ * @range voltage range selection, selects which scale to apply
+ * @oversampling oversampling selection
+ * @base_address address from where to read data in parallel operation
+ * @lock protect sensor state from concurrent accesses to GPIOs
+ * @gpio_convst GPIO descriptor for conversion start signal (CONVST)
+ * @gpio_reset GPIO descriptor for device hard-reset
+ * @gpio_range GPIO descriptor for range selection
+ * @gpio_standby GPIO descriptor for stand-by signal (STBY),
+ * controls power-down mode of device
+ * @gpio_frstdata GPIO descriptor for reading from device when data
+ * is being read on the first channel
+ * @gpio_os GPIO descriptors to control oversampling on the device
+ * @complete completion to indicate end of conversion
+ * @trig The IIO trigger associated with the device.
+ * @data buffer for reading data from the device
+ */
+struct ad7606_state {
+ struct device *dev;
+ const struct ad7606_chip_info *chip_info;
+ struct regulator *reg;
+ const struct ad7606_bus_ops *bops;
+ unsigned int range;
+ unsigned int oversampling;
+ void __iomem *base_address;
+
+ struct mutex lock; /* protect sensor state */
+ struct gpio_desc *gpio_convst;
+ struct gpio_desc *gpio_reset;
+ struct gpio_desc *gpio_range;
+ struct gpio_desc *gpio_standby;
+ struct gpio_desc *gpio_frstdata;
+ struct gpio_descs *gpio_os;
+ struct iio_trigger *trig;
+ struct completion completion;
+
+ /*
+ * DMA (thus cache coherency maintenance) requires the
+ * transfer buffers to live in their own cache lines.
+ * 8 * 16-bit samples + 64-bit timestamp
+ */
+ unsigned short data[12] ____cacheline_aligned;
+};
+
+/**
+ * struct ad7606_bus_ops - driver bus operations
+ * @read_block function pointer for reading blocks of data
+ */
+struct ad7606_bus_ops {
+ /* more methods added in future? */
+ int (*read_block)(struct device *dev, int num, void *data);
+};
+
+int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
+ const char *name, unsigned int id,
+ const struct ad7606_bus_ops *bops);
+
+enum ad7606_supported_device_ids {
+ ID_AD7605_4,
+ ID_AD7606_8,
+ ID_AD7606_6,
+ ID_AD7606_4
+};
+
+#ifdef CONFIG_PM_SLEEP
+extern const struct dev_pm_ops ad7606_pm_ops;
+#define AD7606_PM_OPS (&ad7606_pm_ops)
+#else
+#define AD7606_PM_OPS NULL
+#endif
+
+#endif /* IIO_ADC_AD7606_H_ */
diff --git a/drivers/iio/adc/ad7606_par.c b/drivers/iio/adc/ad7606_par.c
new file mode 100644
index 000000000000..1b08028facde
--- /dev/null
+++ b/drivers/iio/adc/ad7606_par.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AD7606 Parallel Interface ADC driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include <linux/iio/iio.h>
+#include "ad7606.h"
+
+static int ad7606_par16_read_block(struct device *dev,
+ int count, void *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct ad7606_state *st = iio_priv(indio_dev);
+
+ insw((unsigned long)st->base_address, buf, count);
+
+ return 0;
+}
+
+static const struct ad7606_bus_ops ad7606_par16_bops = {
+ .read_block = ad7606_par16_read_block,
+};
+
+static int ad7606_par8_read_block(struct device *dev,
+ int count, void *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct ad7606_state *st = iio_priv(indio_dev);
+
+ insb((unsigned long)st->base_address, buf, count * 2);
+
+ return 0;
+}
+
+static const struct ad7606_bus_ops ad7606_par8_bops = {
+ .read_block = ad7606_par8_read_block,
+};
+
+static int ad7606_par_probe(struct platform_device *pdev)
+{
+ const struct platform_device_id *id = platform_get_device_id(pdev);
+ struct resource *res;
+ void __iomem *addr;
+ resource_size_t remap_size;
+ int irq;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "no irq: %d\n", irq);
+ return irq;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ addr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(addr))
+ return PTR_ERR(addr);
+
+ remap_size = resource_size(res);
+
+ return ad7606_probe(&pdev->dev, irq, addr,
+ id->name, id->driver_data,
+ remap_size > 1 ? &ad7606_par16_bops :
+ &ad7606_par8_bops);
+}
+
+static const struct platform_device_id ad7606_driver_ids[] = {
+ { .name = "ad7605-4", .driver_data = ID_AD7605_4, },
+ { .name = "ad7606-4", .driver_data = ID_AD7606_4, },
+ { .name = "ad7606-6", .driver_data = ID_AD7606_6, },
+ { .name = "ad7606-8", .driver_data = ID_AD7606_8, },
+ { }
+};
+MODULE_DEVICE_TABLE(platform, ad7606_driver_ids);
+
+static const struct of_device_id ad7606_of_match[] = {
+ { .compatible = "adi,ad7605-4" },
+ { .compatible = "adi,ad7606-4" },
+ { .compatible = "adi,ad7606-6" },
+ { .compatible = "adi,ad7606-8" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, ad7606_of_match);
+
+static struct platform_driver ad7606_driver = {
+ .probe = ad7606_par_probe,
+ .id_table = ad7606_driver_ids,
+ .driver = {
+ .name = "ad7606",
+ .pm = AD7606_PM_OPS,
+ .of_match_table = ad7606_of_match,
+ },
+};
+module_platform_driver(ad7606_driver);
+
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
+MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/adc/ad7606_spi.c b/drivers/iio/adc/ad7606_spi.c
new file mode 100644
index 000000000000..4fd0ec36a086
--- /dev/null
+++ b/drivers/iio/adc/ad7606_spi.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AD7606 SPI ADC driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/types.h>
+#include <linux/err.h>
+
+#include <linux/iio/iio.h>
+#include "ad7606.h"
+
+#define MAX_SPI_FREQ_HZ 23500000 /* VDRIVE above 4.75 V */
+
+static int ad7606_spi_read_block(struct device *dev,
+ int count, void *buf)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ int i, ret;
+ unsigned short *data = buf;
+ __be16 *bdata = buf;
+
+ ret = spi_read(spi, buf, count * 2);
+ if (ret < 0) {
+ dev_err(&spi->dev, "SPI read error\n");
+ return ret;
+ }
+
+ for (i = 0; i < count; i++)
+ data[i] = be16_to_cpu(bdata[i]);
+
+ return 0;
+}
+
+static const struct ad7606_bus_ops ad7606_spi_bops = {
+ .read_block = ad7606_spi_read_block,
+};
+
+static int ad7606_spi_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+
+ return ad7606_probe(&spi->dev, spi->irq, NULL,
+ id->name, id->driver_data,
+ &ad7606_spi_bops);
+}
+
+static const struct spi_device_id ad7606_id_table[] = {
+ { "ad7605-4", ID_AD7605_4 },
+ { "ad7606-4", ID_AD7606_4 },
+ { "ad7606-6", ID_AD7606_6 },
+ { "ad7606-8", ID_AD7606_8 },
+ {}
+};
+MODULE_DEVICE_TABLE(spi, ad7606_id_table);
+
+static const struct of_device_id ad7606_of_match[] = {
+ { .compatible = "adi,ad7605-4" },
+ { .compatible = "adi,ad7606-4" },
+ { .compatible = "adi,ad7606-6" },
+ { .compatible = "adi,ad7606-8" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, ad7606_of_match);
+
+static struct spi_driver ad7606_driver = {
+ .driver = {
+ .name = "ad7606",
+ .of_match_table = ad7606_of_match,
+ .pm = AD7606_PM_OPS,
+ },
+ .probe = ad7606_spi_probe,
+ .id_table = ad7606_id_table,
+};
+module_spi_driver(ad7606_driver);
+
+MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
+MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/adc/ad7768-1.c b/drivers/iio/adc/ad7768-1.c
new file mode 100644
index 000000000000..0d132708c429
--- /dev/null
+++ b/drivers/iio/adc/ad7768-1.c
@@ -0,0 +1,655 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Analog Devices AD7768-1 SPI ADC driver
+ *
+ * Copyright 2017 Analog Devices Inc.
+ */
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/sysfs.h>
+#include <linux/spi/spi.h>
+
+#include <linux/iio/buffer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+
+/* AD7768 registers definition */
+#define AD7768_REG_CHIP_TYPE 0x3
+#define AD7768_REG_PROD_ID_L 0x4
+#define AD7768_REG_PROD_ID_H 0x5
+#define AD7768_REG_CHIP_GRADE 0x6
+#define AD7768_REG_SCRATCH_PAD 0x0A
+#define AD7768_REG_VENDOR_L 0x0C
+#define AD7768_REG_VENDOR_H 0x0D
+#define AD7768_REG_INTERFACE_FORMAT 0x14
+#define AD7768_REG_POWER_CLOCK 0x15
+#define AD7768_REG_ANALOG 0x16
+#define AD7768_REG_ANALOG2 0x17
+#define AD7768_REG_CONVERSION 0x18
+#define AD7768_REG_DIGITAL_FILTER 0x19
+#define AD7768_REG_SINC3_DEC_RATE_MSB 0x1A
+#define AD7768_REG_SINC3_DEC_RATE_LSB 0x1B
+#define AD7768_REG_DUTY_CYCLE_RATIO 0x1C
+#define AD7768_REG_SYNC_RESET 0x1D
+#define AD7768_REG_GPIO_CONTROL 0x1E
+#define AD7768_REG_GPIO_WRITE 0x1F
+#define AD7768_REG_GPIO_READ 0x20
+#define AD7768_REG_OFFSET_HI 0x21
+#define AD7768_REG_OFFSET_MID 0x22
+#define AD7768_REG_OFFSET_LO 0x23
+#define AD7768_REG_GAIN_HI 0x24
+#define AD7768_REG_GAIN_MID 0x25
+#define AD7768_REG_GAIN_LO 0x26
+#define AD7768_REG_SPI_DIAG_ENABLE 0x28
+#define AD7768_REG_ADC_DIAG_ENABLE 0x29
+#define AD7768_REG_DIG_DIAG_ENABLE 0x2A
+#define AD7768_REG_ADC_DATA 0x2C
+#define AD7768_REG_MASTER_STATUS 0x2D
+#define AD7768_REG_SPI_DIAG_STATUS 0x2E
+#define AD7768_REG_ADC_DIAG_STATUS 0x2F
+#define AD7768_REG_DIG_DIAG_STATUS 0x30
+#define AD7768_REG_MCLK_COUNTER 0x31
+
+/* AD7768_REG_POWER_CLOCK */
+#define AD7768_PWR_MCLK_DIV_MSK GENMASK(5, 4)
+#define AD7768_PWR_MCLK_DIV(x) FIELD_PREP(AD7768_PWR_MCLK_DIV_MSK, x)
+#define AD7768_PWR_PWRMODE_MSK GENMASK(1, 0)
+#define AD7768_PWR_PWRMODE(x) FIELD_PREP(AD7768_PWR_PWRMODE_MSK, x)
+
+/* AD7768_REG_DIGITAL_FILTER */
+#define AD7768_DIG_FIL_FIL_MSK GENMASK(6, 4)
+#define AD7768_DIG_FIL_FIL(x) FIELD_PREP(AD7768_DIG_FIL_FIL_MSK, x)
+#define AD7768_DIG_FIL_DEC_MSK GENMASK(2, 0)
+#define AD7768_DIG_FIL_DEC_RATE(x) FIELD_PREP(AD7768_DIG_FIL_DEC_MSK, x)
+
+/* AD7768_REG_CONVERSION */
+#define AD7768_CONV_MODE_MSK GENMASK(2, 0)
+#define AD7768_CONV_MODE(x) FIELD_PREP(AD7768_CONV_MODE_MSK, x)
+
+#define AD7768_RD_FLAG_MSK(x) (BIT(6) | ((x) & 0x3F))
+#define AD7768_WR_FLAG_MSK(x) ((x) & 0x3F)
+
+enum ad7768_conv_mode {
+ AD7768_CONTINUOUS,
+ AD7768_ONE_SHOT,
+ AD7768_SINGLE,
+ AD7768_PERIODIC,
+ AD7768_STANDBY
+};
+
+enum ad7768_pwrmode {
+ AD7768_ECO_MODE = 0,
+ AD7768_MED_MODE = 2,
+ AD7768_FAST_MODE = 3
+};
+
+enum ad7768_mclk_div {
+ AD7768_MCLK_DIV_16,
+ AD7768_MCLK_DIV_8,
+ AD7768_MCLK_DIV_4,
+ AD7768_MCLK_DIV_2
+};
+
+enum ad7768_dec_rate {
+ AD7768_DEC_RATE_32 = 0,
+ AD7768_DEC_RATE_64 = 1,
+ AD7768_DEC_RATE_128 = 2,
+ AD7768_DEC_RATE_256 = 3,
+ AD7768_DEC_RATE_512 = 4,
+ AD7768_DEC_RATE_1024 = 5,
+ AD7768_DEC_RATE_8 = 9,
+ AD7768_DEC_RATE_16 = 10
+};
+
+struct ad7768_clk_configuration {
+ enum ad7768_mclk_div mclk_div;
+ enum ad7768_dec_rate dec_rate;
+ unsigned int clk_div;
+ enum ad7768_pwrmode pwrmode;
+};
+
+static const struct ad7768_clk_configuration ad7768_clk_config[] = {
+ { AD7768_MCLK_DIV_2, AD7768_DEC_RATE_8, 16, AD7768_FAST_MODE },
+ { AD7768_MCLK_DIV_2, AD7768_DEC_RATE_16, 32, AD7768_FAST_MODE },
+ { AD7768_MCLK_DIV_2, AD7768_DEC_RATE_32, 64, AD7768_FAST_MODE },
+ { AD7768_MCLK_DIV_2, AD7768_DEC_RATE_64, 128, AD7768_FAST_MODE },
+ { AD7768_MCLK_DIV_2, AD7768_DEC_RATE_128, 256, AD7768_FAST_MODE },
+ { AD7768_MCLK_DIV_4, AD7768_DEC_RATE_128, 512, AD7768_MED_MODE },
+ { AD7768_MCLK_DIV_4, AD7768_DEC_RATE_256, 1024, AD7768_MED_MODE },
+ { AD7768_MCLK_DIV_4, AD7768_DEC_RATE_512, 2048, AD7768_MED_MODE },
+ { AD7768_MCLK_DIV_4, AD7768_DEC_RATE_1024, 4096, AD7768_MED_MODE },
+ { AD7768_MCLK_DIV_8, AD7768_DEC_RATE_1024, 8192, AD7768_MED_MODE },
+ { AD7768_MCLK_DIV_16, AD7768_DEC_RATE_1024, 16384, AD7768_ECO_MODE },
+};
+
+static const struct iio_chan_spec ad7768_channels[] = {
+ {
+ .type = IIO_VOLTAGE,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ .indexed = 1,
+ .channel = 0,
+ .scan_index = 0,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 24,
+ .storagebits = 32,
+ .shift = 8,
+ .endianness = IIO_BE,
+ },
+ },
+};
+
+struct ad7768_state {
+ struct spi_device *spi;
+ struct regulator *vref;
+ struct mutex lock;
+ struct clk *mclk;
+ unsigned int mclk_freq;
+ unsigned int samp_freq;
+ struct completion completion;
+ struct iio_trigger *trig;
+ struct gpio_desc *gpio_sync_in;
+ /*
+ * DMA (thus cache coherency maintenance) requires the
+ * transfer buffers to live in their own cache lines.
+ */
+ union {
+ __be32 d32;
+ u8 d8[2];
+ } data ____cacheline_aligned;
+};
+
+static int ad7768_spi_reg_read(struct ad7768_state *st, unsigned int addr,
+ unsigned int len)
+{
+ unsigned int shift;
+ int ret;
+
+ shift = 32 - (8 * len);
+ st->data.d8[0] = AD7768_RD_FLAG_MSK(addr);
+
+ ret = spi_write_then_read(st->spi, st->data.d8, 1,
+ &st->data.d32, len);
+ if (ret < 0)
+ return ret;
+
+ return (be32_to_cpu(st->data.d32) >> shift);
+}
+
+static int ad7768_spi_reg_write(struct ad7768_state *st,
+ unsigned int addr,
+ unsigned int val)
+{
+ st->data.d8[0] = AD7768_WR_FLAG_MSK(addr);
+ st->data.d8[1] = val & 0xFF;
+
+ return spi_write(st->spi, st->data.d8, 2);
+}
+
+static int ad7768_set_mode(struct ad7768_state *st,
+ enum ad7768_conv_mode mode)
+{
+ int regval;
+
+ regval = ad7768_spi_reg_read(st, AD7768_REG_CONVERSION, 1);
+ if (regval < 0)
+ return regval;
+
+ regval &= ~AD7768_CONV_MODE_MSK;
+ regval |= AD7768_CONV_MODE(mode);
+
+ return ad7768_spi_reg_write(st, AD7768_REG_CONVERSION, regval);
+}
+
+static int ad7768_scan_direct(struct iio_dev *indio_dev)
+{
+ struct ad7768_state *st = iio_priv(indio_dev);
+ int readval, ret;
+
+ reinit_completion(&st->completion);
+
+ ret = ad7768_set_mode(st, AD7768_ONE_SHOT);
+ if (ret < 0)
+ return ret;
+
+ ret = wait_for_completion_timeout(&st->completion,
+ msecs_to_jiffies(1000));
+ if (!ret)
+ return -ETIMEDOUT;
+
+ readval = ad7768_spi_reg_read(st, AD7768_REG_ADC_DATA, 3);
+ if (readval < 0)
+ return readval;
+ /*
+ * Any SPI configuration of the AD7768-1 can only be
+ * performed in continuous conversion mode.
+ */
+ ret = ad7768_set_mode(st, AD7768_CONTINUOUS);
+ if (ret < 0)
+ return ret;
+
+ return readval;
+}
+
+static int ad7768_reg_access(struct iio_dev *indio_dev,
+ unsigned int reg,
+ unsigned int writeval,
+ unsigned int *readval)
+{
+ struct ad7768_state *st = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&st->lock);
+ if (readval) {
+ ret = ad7768_spi_reg_read(st, reg, 1);
+ if (ret < 0)
+ goto err_unlock;
+ *readval = ret;
+ ret = 0;
+ } else {
+ ret = ad7768_spi_reg_write(st, reg, writeval);
+ }
+err_unlock:
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static int ad7768_set_dig_fil(struct ad7768_state *st,
+ enum ad7768_dec_rate dec_rate)
+{
+ unsigned int mode;
+ int ret;
+
+ if (dec_rate == AD7768_DEC_RATE_8 || dec_rate == AD7768_DEC_RATE_16)
+ mode = AD7768_DIG_FIL_FIL(dec_rate);
+ else
+ mode = AD7768_DIG_FIL_DEC_RATE(dec_rate);
+
+ ret = ad7768_spi_reg_write(st, AD7768_REG_DIGITAL_FILTER, mode);
+ if (ret < 0)
+ return ret;
+
+ /* A sync-in pulse is required every time the filter dec rate changes */
+ gpiod_set_value(st->gpio_sync_in, 1);
+ gpiod_set_value(st->gpio_sync_in, 0);
+
+ return 0;
+}
+
+static int ad7768_set_freq(struct ad7768_state *st,
+ unsigned int freq)
+{
+ unsigned int diff_new, diff_old, pwr_mode, i, idx;
+ int res, ret;
+
+ diff_old = U32_MAX;
+ idx = 0;
+
+ res = DIV_ROUND_CLOSEST(st->mclk_freq, freq);
+
+ /* Find the closest match for the desired sampling frequency */
+ for (i = 0; i < ARRAY_SIZE(ad7768_clk_config); i++) {
+ diff_new = abs(res - ad7768_clk_config[i].clk_div);
+ if (diff_new < diff_old) {
+ diff_old = diff_new;
+ idx = i;
+ }
+ }
+
+ /*
+ * Set both the mclk_div and pwrmode with a single write to the
+ * POWER_CLOCK register
+ */
+ pwr_mode = AD7768_PWR_MCLK_DIV(ad7768_clk_config[idx].mclk_div) |
+ AD7768_PWR_PWRMODE(ad7768_clk_config[idx].pwrmode);
+ ret = ad7768_spi_reg_write(st, AD7768_REG_POWER_CLOCK, pwr_mode);
+ if (ret < 0)
+ return ret;
+
+ ret = ad7768_set_dig_fil(st, ad7768_clk_config[idx].dec_rate);
+ if (ret < 0)
+ return ret;
+
+ st->samp_freq = DIV_ROUND_CLOSEST(st->mclk_freq,
+ ad7768_clk_config[idx].clk_div);
+
+ return 0;
+}
+
+static ssize_t ad7768_sampling_freq_avail(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct ad7768_state *st = iio_priv(indio_dev);
+ unsigned int freq;
+ int i, len = 0;
+
+ for (i = 0; i < ARRAY_SIZE(ad7768_clk_config); i++) {
+ freq = DIV_ROUND_CLOSEST(st->mclk_freq,
+ ad7768_clk_config[i].clk_div);
+ len += scnprintf(buf + len, PAGE_SIZE - len, "%d ", freq);
+ }
+
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(ad7768_sampling_freq_avail);
+
+static int ad7768_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long info)
+{
+ struct ad7768_state *st = iio_priv(indio_dev);
+ int scale_uv, ret;
+
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ ret = ad7768_scan_direct(indio_dev);
+ if (ret >= 0)
+ *val = ret;
+
+ iio_device_release_direct_mode(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ return IIO_VAL_INT;
+
+ case IIO_CHAN_INFO_SCALE:
+ scale_uv = regulator_get_voltage(st->vref);
+ if (scale_uv < 0)
+ return scale_uv;
+
+ *val = (scale_uv * 2) / 1000;
+ *val2 = chan->scan_type.realbits;
+
+ return IIO_VAL_FRACTIONAL_LOG2;
+
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ *val = st->samp_freq;
+
+ return IIO_VAL_INT;
+ }
+
+ return -EINVAL;
+}
+
+static int ad7768_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long info)
+{
+ struct ad7768_state *st = iio_priv(indio_dev);
+
+ switch (info) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return ad7768_set_freq(st, val);
+ default:
+ return -EINVAL;
+ }
+}
+
+static struct attribute *ad7768_attributes[] = {
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group ad7768_group = {
+ .attrs = ad7768_attributes,
+};
+
+static const struct iio_info ad7768_info = {
+ .attrs = &ad7768_group,
+ .read_raw = &ad7768_read_raw,
+ .write_raw = &ad7768_write_raw,
+ .debugfs_reg_access = &ad7768_reg_access,
+};
+
+static int ad7768_setup(struct ad7768_state *st)
+{
+ int ret;
+
+ /*
+ * Two writes to the SPI_RESET[1:0] bits are required to initiate
+ * a software reset. The bits must first be set to 11, and then
+ * to 10. When the sequence is detected, the reset occurs.
+ * See the datasheet, page 70.
+ */
+ ret = ad7768_spi_reg_write(st, AD7768_REG_SYNC_RESET, 0x3);
+ if (ret)
+ return ret;
+
+ ret = ad7768_spi_reg_write(st, AD7768_REG_SYNC_RESET, 0x2);
+ if (ret)
+ return ret;
+
+ st->gpio_sync_in = devm_gpiod_get(&st->spi->dev, "adi,sync-in",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(st->gpio_sync_in))
+ return PTR_ERR(st->gpio_sync_in);
+
+ /* Set the default sampling frequency to 32000 kSPS */
+ return ad7768_set_freq(st, 32000);
+}
+
+static irqreturn_t ad7768_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct ad7768_state *st = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&st->lock);
+
+ ret = spi_read(st->spi, &st->data.d32, 3);
+ if (ret < 0)
+ goto err_unlock;
+
+ iio_push_to_buffers_with_timestamp(indio_dev, &st->data.d32,
+ iio_get_time_ns(indio_dev));
+
+ iio_trigger_notify_done(indio_dev->trig);
+err_unlock:
+ mutex_unlock(&st->lock);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t ad7768_interrupt(int irq, void *dev_id)
+{
+ struct iio_dev *indio_dev = dev_id;
+ struct ad7768_state *st = iio_priv(indio_dev);
+
+ if (iio_buffer_enabled(indio_dev))
+ iio_trigger_poll(st->trig);
+ else
+ complete(&st->completion);
+
+ return IRQ_HANDLED;
+};
+
+static int ad7768_buffer_postenable(struct iio_dev *indio_dev)
+{
+ struct ad7768_state *st = iio_priv(indio_dev);
+
+ iio_triggered_buffer_postenable(indio_dev);
+ /*
+ * Write a 1 to the LSB of the INTERFACE_FORMAT register to enter
+ * continuous read mode. Subsequent data reads do not require an
+ * initial 8-bit write to query the ADC_DATA register.
+ */
+ return ad7768_spi_reg_write(st, AD7768_REG_INTERFACE_FORMAT, 0x01);
+}
+
+static int ad7768_buffer_predisable(struct iio_dev *indio_dev)
+{
+ struct ad7768_state *st = iio_priv(indio_dev);
+ int ret;
+
+ /*
+ * To exit continuous read mode, perform a single read of the ADC_DATA
+ * reg (0x2C), which allows further configuration of the device.
+ */
+ ret = ad7768_spi_reg_read(st, AD7768_REG_ADC_DATA, 3);
+ if (ret < 0)
+ return ret;
+
+ return iio_triggered_buffer_predisable(indio_dev);
+}
+
+static const struct iio_buffer_setup_ops ad7768_buffer_ops = {
+ .postenable = &ad7768_buffer_postenable,
+ .predisable = &ad7768_buffer_predisable,
+};
+
+static const struct iio_trigger_ops ad7768_trigger_ops = {
+ .validate_device = iio_trigger_validate_own_device,
+};
+
+static void ad7768_regulator_disable(void *data)
+{
+ struct ad7768_state *st = data;
+
+ regulator_disable(st->vref);
+}
+
+static void ad7768_clk_disable(void *data)
+{
+ struct ad7768_state *st = data;
+
+ clk_disable_unprepare(st->mclk);
+}
+
+static int ad7768_probe(struct spi_device *spi)
+{
+ struct ad7768_state *st;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+ st->spi = spi;
+
+ st->vref = devm_regulator_get(&spi->dev, "vref");
+ if (IS_ERR(st->vref))
+ return PTR_ERR(st->vref);
+
+ ret = regulator_enable(st->vref);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to enable specified vref supply\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&spi->dev, ad7768_regulator_disable, st);
+ if (ret)
+ return ret;
+
+ st->mclk = devm_clk_get(&spi->dev, "mclk");
+ if (IS_ERR(st->mclk))
+ return PTR_ERR(st->mclk);
+
+ ret = clk_prepare_enable(st->mclk);
+ if (ret < 0)
+ return ret;
+
+ ret = devm_add_action_or_reset(&spi->dev, ad7768_clk_disable, st);
+ if (ret)
+ return ret;
+
+ st->mclk_freq = clk_get_rate(st->mclk);
+
+ spi_set_drvdata(spi, indio_dev);
+ mutex_init(&st->lock);
+
+ indio_dev->channels = ad7768_channels;
+ indio_dev->num_channels = ARRAY_SIZE(ad7768_channels);
+ indio_dev->dev.parent = &spi->dev;
+ indio_dev->name = spi_get_device_id(spi)->name;
+ indio_dev->info = &ad7768_info;
+ indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_TRIGGERED;
+
+ ret = ad7768_setup(st);
+ if (ret < 0) {
+ dev_err(&spi->dev, "AD7768 setup failed\n");
+ return ret;
+ }
+
+ st->trig = devm_iio_trigger_alloc(&spi->dev, "%s-dev%d",
+ indio_dev->name, indio_dev->id);
+ if (!st->trig)
+ return -ENOMEM;
+
+ st->trig->ops = &ad7768_trigger_ops;
+ st->trig->dev.parent = &spi->dev;
+ iio_trigger_set_drvdata(st->trig, indio_dev);
+ ret = devm_iio_trigger_register(&spi->dev, st->trig);
+ if (ret)
+ return ret;
+
+ indio_dev->trig = iio_trigger_get(st->trig);
+
+ init_completion(&st->completion);
+
+ ret = devm_request_irq(&spi->dev, spi->irq,
+ &ad7768_interrupt,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ indio_dev->name, indio_dev);
+ if (ret)
+ return ret;
+
+ ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev,
+ &iio_pollfunc_store_time,
+ &ad7768_trigger_handler,
+ &ad7768_buffer_ops);
+ if (ret)
+ return ret;
+
+ return devm_iio_device_register(&spi->dev, indio_dev);
+}
+
+static const struct spi_device_id ad7768_id_table[] = {
+ { "ad7768-1", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(spi, ad7768_id_table);
+
+static const struct of_device_id ad7768_of_match[] = {
+ { .compatible = "adi,ad7768-1" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, ad7768_of_match);
+
+static struct spi_driver ad7768_driver = {
+ .driver = {
+ .name = "ad7768-1",
+ .of_match_table = ad7768_of_match,
+ },
+ .probe = ad7768_probe,
+ .id_table = ad7768_id_table,
+};
+module_spi_driver(ad7768_driver);
+
+MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
+MODULE_DESCRIPTION("Analog Devices AD7768-1 ADC driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
index fa2d2b5767f3..1ca2c4d39f87 100644
--- a/drivers/iio/adc/exynos_adc.c
+++ b/drivers/iio/adc/exynos_adc.c
@@ -115,6 +115,7 @@
#define MAX_ADC_V2_CHANNELS 10
#define MAX_ADC_V1_CHANNELS 8
#define MAX_EXYNOS3250_ADC_CHANNELS 2
+#define MAX_EXYNOS4212_ADC_CHANNELS 4
#define MAX_S5PV210_ADC_CHANNELS 10
/* Bit definitions common for ADC_V1 and ADC_V2 */
@@ -271,6 +272,19 @@ static void exynos_adc_v1_start_conv(struct exynos_adc *info,
writel(con1 | ADC_CON_EN_START, ADC_V1_CON(info->regs));
}
+/* Exynos4212 and 4412 is like ADCv1 but with four channels only */
+static const struct exynos_adc_data exynos4212_adc_data = {
+ .num_channels = MAX_EXYNOS4212_ADC_CHANNELS,
+ .mask = ADC_DATX_MASK, /* 12 bit ADC resolution */
+ .needs_adc_phy = true,
+ .phy_offset = EXYNOS_ADCV1_PHY_OFFSET,
+
+ .init_hw = exynos_adc_v1_init_hw,
+ .exit_hw = exynos_adc_v1_exit_hw,
+ .clear_irq = exynos_adc_v1_clear_irq,
+ .start_conv = exynos_adc_v1_start_conv,
+};
+
static const struct exynos_adc_data exynos_adc_v1_data = {
.num_channels = MAX_ADC_V1_CHANNELS,
.mask = ADC_DATX_MASK, /* 12 bit ADC resolution */
@@ -493,6 +507,9 @@ static const struct of_device_id exynos_adc_match[] = {
.compatible = "samsung,s5pv210-adc",
.data = &exynos_adc_s5pv210_data,
}, {
+ .compatible = "samsung,exynos4212-adc",
+ .data = &exynos4212_adc_data,
+ }, {
.compatible = "samsung,exynos-adc-v1",
.data = &exynos_adc_v1_data,
}, {
@@ -929,7 +946,7 @@ static int exynos_adc_remove(struct platform_device *pdev)
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
struct exynos_adc *info = iio_priv(indio_dev);
- if (IS_REACHABLE(CONFIG_INPUT)) {
+ if (IS_REACHABLE(CONFIG_INPUT) && info->input) {
free_irq(info->tsirq, info);
input_unregister_device(info->input);
}
diff --git a/drivers/iio/adc/ingenic-adc.c b/drivers/iio/adc/ingenic-adc.c
new file mode 100644
index 000000000000..6ee1673deb0d
--- /dev/null
+++ b/drivers/iio/adc/ingenic-adc.c
@@ -0,0 +1,364 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ADC driver for the Ingenic JZ47xx SoCs
+ * Copyright (c) 2019 Artur Rojek <contact@artur-rojek.eu>
+ *
+ * based on drivers/mfd/jz4740-adc.c
+ */
+
+#include <dt-bindings/iio/adc/ingenic,adc.h>
+#include <linux/clk.h>
+#include <linux/iio/iio.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+
+#define JZ_ADC_REG_ENABLE 0x00
+#define JZ_ADC_REG_CFG 0x04
+#define JZ_ADC_REG_CTRL 0x08
+#define JZ_ADC_REG_STATUS 0x0c
+#define JZ_ADC_REG_ADTCH 0x18
+#define JZ_ADC_REG_ADBDAT 0x1c
+#define JZ_ADC_REG_ADSDAT 0x20
+
+#define JZ_ADC_REG_CFG_BAT_MD BIT(4)
+
+#define JZ_ADC_AUX_VREF 3300
+#define JZ_ADC_AUX_VREF_BITS 12
+#define JZ_ADC_BATTERY_LOW_VREF 2500
+#define JZ_ADC_BATTERY_LOW_VREF_BITS 12
+#define JZ4725B_ADC_BATTERY_HIGH_VREF 7500
+#define JZ4725B_ADC_BATTERY_HIGH_VREF_BITS 10
+#define JZ4740_ADC_BATTERY_HIGH_VREF (7500 * 0.986)
+#define JZ4740_ADC_BATTERY_HIGH_VREF_BITS 12
+
+struct ingenic_adc_soc_data {
+ unsigned int battery_high_vref;
+ unsigned int battery_high_vref_bits;
+ const int *battery_raw_avail;
+ size_t battery_raw_avail_size;
+ const int *battery_scale_avail;
+ size_t battery_scale_avail_size;
+};
+
+struct ingenic_adc {
+ void __iomem *base;
+ struct clk *clk;
+ struct mutex lock;
+ const struct ingenic_adc_soc_data *soc_data;
+ bool low_vref_mode;
+};
+
+static void ingenic_adc_set_config(struct ingenic_adc *adc,
+ uint32_t mask,
+ uint32_t val)
+{
+ uint32_t cfg;
+
+ clk_enable(adc->clk);
+ mutex_lock(&adc->lock);
+
+ cfg = readl(adc->base + JZ_ADC_REG_CFG) & ~mask;
+ cfg |= val;
+ writel(cfg, adc->base + JZ_ADC_REG_CFG);
+
+ mutex_unlock(&adc->lock);
+ clk_disable(adc->clk);
+}
+
+static void ingenic_adc_enable(struct ingenic_adc *adc,
+ int engine,
+ bool enabled)
+{
+ u8 val;
+
+ mutex_lock(&adc->lock);
+ val = readb(adc->base + JZ_ADC_REG_ENABLE);
+
+ if (enabled)
+ val |= BIT(engine);
+ else
+ val &= ~BIT(engine);
+
+ writeb(val, adc->base + JZ_ADC_REG_ENABLE);
+ mutex_unlock(&adc->lock);
+}
+
+static int ingenic_adc_capture(struct ingenic_adc *adc,
+ int engine)
+{
+ u8 val;
+ int ret;
+
+ ingenic_adc_enable(adc, engine, true);
+ ret = readb_poll_timeout(adc->base + JZ_ADC_REG_ENABLE, val,
+ !(val & BIT(engine)), 250, 1000);
+ if (ret)
+ ingenic_adc_enable(adc, engine, false);
+
+ return ret;
+}
+
+static int ingenic_adc_write_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long m)
+{
+ struct ingenic_adc *adc = iio_priv(iio_dev);
+
+ switch (m) {
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->channel) {
+ case INGENIC_ADC_BATTERY:
+ if (val > JZ_ADC_BATTERY_LOW_VREF) {
+ ingenic_adc_set_config(adc,
+ JZ_ADC_REG_CFG_BAT_MD,
+ 0);
+ adc->low_vref_mode = false;
+ } else {
+ ingenic_adc_set_config(adc,
+ JZ_ADC_REG_CFG_BAT_MD,
+ JZ_ADC_REG_CFG_BAT_MD);
+ adc->low_vref_mode = true;
+ }
+ return 0;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static const int jz4725b_adc_battery_raw_avail[] = {
+ 0, 1, (1 << JZ_ADC_BATTERY_LOW_VREF_BITS) - 1,
+};
+
+static const int jz4725b_adc_battery_scale_avail[] = {
+ JZ4725B_ADC_BATTERY_HIGH_VREF, JZ4725B_ADC_BATTERY_HIGH_VREF_BITS,
+ JZ_ADC_BATTERY_LOW_VREF, JZ_ADC_BATTERY_LOW_VREF_BITS,
+};
+
+static const int jz4740_adc_battery_raw_avail[] = {
+ 0, 1, (1 << JZ_ADC_BATTERY_LOW_VREF_BITS) - 1,
+};
+
+static const int jz4740_adc_battery_scale_avail[] = {
+ JZ4740_ADC_BATTERY_HIGH_VREF, JZ4740_ADC_BATTERY_HIGH_VREF_BITS,
+ JZ_ADC_BATTERY_LOW_VREF, JZ_ADC_BATTERY_LOW_VREF_BITS,
+};
+
+static const struct ingenic_adc_soc_data jz4725b_adc_soc_data = {
+ .battery_high_vref = JZ4725B_ADC_BATTERY_HIGH_VREF,
+ .battery_high_vref_bits = JZ4725B_ADC_BATTERY_HIGH_VREF_BITS,
+ .battery_raw_avail = jz4725b_adc_battery_raw_avail,
+ .battery_raw_avail_size = ARRAY_SIZE(jz4725b_adc_battery_raw_avail),
+ .battery_scale_avail = jz4725b_adc_battery_scale_avail,
+ .battery_scale_avail_size = ARRAY_SIZE(jz4725b_adc_battery_scale_avail),
+};
+
+static const struct ingenic_adc_soc_data jz4740_adc_soc_data = {
+ .battery_high_vref = JZ4740_ADC_BATTERY_HIGH_VREF,
+ .battery_high_vref_bits = JZ4740_ADC_BATTERY_HIGH_VREF_BITS,
+ .battery_raw_avail = jz4740_adc_battery_raw_avail,
+ .battery_raw_avail_size = ARRAY_SIZE(jz4740_adc_battery_raw_avail),
+ .battery_scale_avail = jz4740_adc_battery_scale_avail,
+ .battery_scale_avail_size = ARRAY_SIZE(jz4740_adc_battery_scale_avail),
+};
+
+static int ingenic_adc_read_avail(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan,
+ const int **vals,
+ int *type,
+ int *length,
+ long m)
+{
+ struct ingenic_adc *adc = iio_priv(iio_dev);
+
+ switch (m) {
+ case IIO_CHAN_INFO_RAW:
+ *type = IIO_VAL_INT;
+ *length = adc->soc_data->battery_raw_avail_size;
+ *vals = adc->soc_data->battery_raw_avail;
+ return IIO_AVAIL_RANGE;
+ case IIO_CHAN_INFO_SCALE:
+ *type = IIO_VAL_FRACTIONAL_LOG2;
+ *length = adc->soc_data->battery_scale_avail_size;
+ *vals = adc->soc_data->battery_scale_avail;
+ return IIO_AVAIL_LIST;
+ default:
+ return -EINVAL;
+ };
+}
+
+static int ingenic_adc_read_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long m)
+{
+ struct ingenic_adc *adc = iio_priv(iio_dev);
+ int ret;
+
+ switch (m) {
+ case IIO_CHAN_INFO_RAW:
+ clk_enable(adc->clk);
+ ret = ingenic_adc_capture(adc, chan->channel);
+ if (ret) {
+ clk_disable(adc->clk);
+ return ret;
+ }
+
+ switch (chan->channel) {
+ case INGENIC_ADC_AUX:
+ *val = readw(adc->base + JZ_ADC_REG_ADSDAT);
+ break;
+ case INGENIC_ADC_BATTERY:
+ *val = readw(adc->base + JZ_ADC_REG_ADBDAT);
+ break;
+ }
+
+ clk_disable(adc->clk);
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->channel) {
+ case INGENIC_ADC_AUX:
+ *val = JZ_ADC_AUX_VREF;
+ *val2 = JZ_ADC_AUX_VREF_BITS;
+ break;
+ case INGENIC_ADC_BATTERY:
+ if (adc->low_vref_mode) {
+ *val = JZ_ADC_BATTERY_LOW_VREF;
+ *val2 = JZ_ADC_BATTERY_LOW_VREF_BITS;
+ } else {
+ *val = adc->soc_data->battery_high_vref;
+ *val2 = adc->soc_data->battery_high_vref_bits;
+ }
+ break;
+ }
+
+ return IIO_VAL_FRACTIONAL_LOG2;
+ default:
+ return -EINVAL;
+ }
+}
+
+static void ingenic_adc_clk_cleanup(void *data)
+{
+ clk_unprepare(data);
+}
+
+static const struct iio_info ingenic_adc_info = {
+ .write_raw = ingenic_adc_write_raw,
+ .read_raw = ingenic_adc_read_raw,
+ .read_avail = ingenic_adc_read_avail,
+};
+
+static const struct iio_chan_spec ingenic_channels[] = {
+ {
+ .extend_name = "aux",
+ .type = IIO_VOLTAGE,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .indexed = 1,
+ .channel = INGENIC_ADC_AUX,
+ },
+ {
+ .extend_name = "battery",
+ .type = IIO_VOLTAGE,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .indexed = 1,
+ .channel = INGENIC_ADC_BATTERY,
+ },
+};
+
+static int ingenic_adc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct iio_dev *iio_dev;
+ struct ingenic_adc *adc;
+ struct resource *mem_base;
+ const struct ingenic_adc_soc_data *soc_data;
+ int ret;
+
+ soc_data = device_get_match_data(dev);
+ if (!soc_data)
+ return -EINVAL;
+
+ iio_dev = devm_iio_device_alloc(dev, sizeof(*adc));
+ if (!iio_dev)
+ return -ENOMEM;
+
+ adc = iio_priv(iio_dev);
+ mutex_init(&adc->lock);
+ adc->soc_data = soc_data;
+
+ mem_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ adc->base = devm_ioremap_resource(dev, mem_base);
+ if (IS_ERR(adc->base)) {
+ dev_err(dev, "Unable to ioremap mmio resource\n");
+ return PTR_ERR(adc->base);
+ }
+
+ adc->clk = devm_clk_get(dev, "adc");
+ if (IS_ERR(adc->clk)) {
+ dev_err(dev, "Unable to get clock\n");
+ return PTR_ERR(adc->clk);
+ }
+
+ ret = clk_prepare_enable(adc->clk);
+ if (ret) {
+ dev_err(dev, "Failed to enable clock\n");
+ return ret;
+ }
+
+ /* Put hardware in a known passive state. */
+ writeb(0x00, adc->base + JZ_ADC_REG_ENABLE);
+ writeb(0xff, adc->base + JZ_ADC_REG_CTRL);
+ clk_disable(adc->clk);
+
+ ret = devm_add_action_or_reset(dev, ingenic_adc_clk_cleanup, adc->clk);
+ if (ret) {
+ dev_err(dev, "Unable to add action\n");
+ return ret;
+ }
+
+ iio_dev->dev.parent = dev;
+ iio_dev->name = "jz-adc";
+ iio_dev->modes = INDIO_DIRECT_MODE;
+ iio_dev->channels = ingenic_channels;
+ iio_dev->num_channels = ARRAY_SIZE(ingenic_channels);
+ iio_dev->info = &ingenic_adc_info;
+
+ ret = devm_iio_device_register(dev, iio_dev);
+ if (ret)
+ dev_err(dev, "Unable to register IIO device\n");
+
+ return ret;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id ingenic_adc_of_match[] = {
+ { .compatible = "ingenic,jz4725b-adc", .data = &jz4725b_adc_soc_data, },
+ { .compatible = "ingenic,jz4740-adc", .data = &jz4740_adc_soc_data, },
+ { },
+};
+MODULE_DEVICE_TABLE(of, ingenic_adc_of_match);
+#endif
+
+static struct platform_driver ingenic_adc_driver = {
+ .driver = {
+ .name = "ingenic-adc",
+ .of_match_table = of_match_ptr(ingenic_adc_of_match),
+ },
+ .probe = ingenic_adc_probe,
+};
+module_platform_driver(ingenic_adc_driver);
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/adc/lpc32xx_adc.c b/drivers/iio/adc/lpc32xx_adc.c
index 20b36690fa4f..e361c1532a75 100644
--- a/drivers/iio/adc/lpc32xx_adc.c
+++ b/drivers/iio/adc/lpc32xx_adc.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* lpc32xx_adc.c - Support for ADC in LPC32XX
*
* 3-channel, 10-bit ADC
*
* Copyright (C) 2011, 2012 Roland Stigge <stigge@antcom.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 729becb2d3d9..f8600fbcdfe3 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -26,6 +26,7 @@
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
+#include <linux/mfd/syscon.h>
#define MESON_SAR_ADC_REG0 0x00
#define MESON_SAR_ADC_REG0_PANEL_DETECT BIT(31)
@@ -174,6 +175,9 @@
#define MESON_SAR_ADC_EFUSE_BYTE3_UPPER_ADC_VAL GENMASK(6, 0)
#define MESON_SAR_ADC_EFUSE_BYTE3_IS_CALIBRATED BIT(7)
+#define MESON_HHI_DPLL_TOP_0 0x318
+#define MESON_HHI_DPLL_TOP_0_TSC_BIT4 BIT(9)
+
/* for use with IIO_VAL_INT_PLUS_MICRO */
#define MILLION 1000000
@@ -280,6 +284,7 @@ struct meson_sar_adc_priv {
struct completion done;
int calibbias;
int calibscale;
+ struct regmap *tsc_regmap;
bool temperature_sensor_calibrated;
u8 temperature_sensor_coefficient;
u16 temperature_sensor_adc_val;
@@ -727,6 +732,15 @@ static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
return ret;
}
+ priv->tsc_regmap =
+ syscon_regmap_lookup_by_phandle(indio_dev->dev.parent->of_node,
+ "amlogic,hhi-sysctrl");
+ if (IS_ERR(priv->tsc_regmap)) {
+ dev_err(indio_dev->dev.parent,
+ "failed to get amlogic,hhi-sysctrl regmap\n");
+ return PTR_ERR(priv->tsc_regmap);
+ }
+
read_len = MESON_SAR_ADC_EFUSE_BYTES;
buf = nvmem_cell_read(temperature_calib, &read_len);
if (IS_ERR(buf)) {
@@ -861,6 +875,22 @@ static int meson_sar_adc_init(struct iio_dev *indio_dev)
priv->temperature_sensor_coefficient);
regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELTA_10,
MESON_SAR_ADC_DELTA_10_TS_C_MASK, regval);
+
+ if (priv->param->temperature_trimming_bits == 5) {
+ if (priv->temperature_sensor_coefficient & BIT(4))
+ regval = MESON_HHI_DPLL_TOP_0_TSC_BIT4;
+ else
+ regval = 0;
+
+ /*
+ * bit [4] (the 5th bit when starting to count at 1)
+ * of the TSC is located in the HHI register area.
+ */
+ regmap_update_bits(priv->tsc_regmap,
+ MESON_HHI_DPLL_TOP_0,
+ MESON_HHI_DPLL_TOP_0_TSC_BIT4,
+ regval);
+ }
} else {
regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELTA_10,
MESON_SAR_ADC_DELTA_10_TS_REVE1, 0);
@@ -1064,6 +1094,9 @@ static const struct meson_sar_adc_param meson_sar_adc_meson8b_param = {
.bandgap_reg = MESON_SAR_ADC_DELTA_10,
.regmap_config = &meson_sar_adc_regmap_config_meson8,
.resolution = 10,
+ .temperature_trimming_bits = 5,
+ .temperature_multiplier = 10,
+ .temperature_divider = 32,
};
static const struct meson_sar_adc_param meson_sar_adc_gxbb_param = {
diff --git a/drivers/iio/adc/npcm_adc.c b/drivers/iio/adc/npcm_adc.c
new file mode 100644
index 000000000000..9e25bbec9c70
--- /dev/null
+++ b/drivers/iio/adc/npcm_adc.c
@@ -0,0 +1,335 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2019 Nuvoton Technology corporation.
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/io.h>
+#include <linux/iio/iio.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spinlock.h>
+#include <linux/uaccess.h>
+
+struct npcm_adc {
+ bool int_status;
+ u32 adc_sample_hz;
+ struct device *dev;
+ void __iomem *regs;
+ struct clk *adc_clk;
+ wait_queue_head_t wq;
+ struct regulator *vref;
+ struct regmap *rst_regmap;
+};
+
+/* NPCM7xx reset module */
+#define NPCM7XX_IPSRST1_OFFSET 0x020
+#define NPCM7XX_IPSRST1_ADC_RST BIT(27)
+
+/* ADC registers */
+#define NPCM_ADCCON 0x00
+#define NPCM_ADCDATA 0x04
+
+/* ADCCON Register Bits */
+#define NPCM_ADCCON_ADC_INT_EN BIT(21)
+#define NPCM_ADCCON_REFSEL BIT(19)
+#define NPCM_ADCCON_ADC_INT_ST BIT(18)
+#define NPCM_ADCCON_ADC_EN BIT(17)
+#define NPCM_ADCCON_ADC_RST BIT(16)
+#define NPCM_ADCCON_ADC_CONV BIT(13)
+
+#define NPCM_ADCCON_CH_MASK GENMASK(27, 24)
+#define NPCM_ADCCON_CH(x) ((x) << 24)
+#define NPCM_ADCCON_DIV_SHIFT 1
+#define NPCM_ADCCON_DIV_MASK GENMASK(8, 1)
+#define NPCM_ADC_DATA_MASK(x) ((x) & GENMASK(9, 0))
+
+#define NPCM_ADC_ENABLE (NPCM_ADCCON_ADC_EN | NPCM_ADCCON_ADC_INT_EN)
+
+/* ADC General Definition */
+#define NPCM_RESOLUTION_BITS 10
+#define NPCM_INT_VREF_MV 2000
+
+#define NPCM_ADC_CHAN(ch) { \
+ .type = IIO_VOLTAGE, \
+ .indexed = 1, \
+ .channel = ch, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+}
+
+static const struct iio_chan_spec npcm_adc_iio_channels[] = {
+ NPCM_ADC_CHAN(0),
+ NPCM_ADC_CHAN(1),
+ NPCM_ADC_CHAN(2),
+ NPCM_ADC_CHAN(3),
+ NPCM_ADC_CHAN(4),
+ NPCM_ADC_CHAN(5),
+ NPCM_ADC_CHAN(6),
+ NPCM_ADC_CHAN(7),
+};
+
+static irqreturn_t npcm_adc_isr(int irq, void *data)
+{
+ u32 regtemp;
+ struct iio_dev *indio_dev = data;
+ struct npcm_adc *info = iio_priv(indio_dev);
+
+ regtemp = ioread32(info->regs + NPCM_ADCCON);
+ if (regtemp & NPCM_ADCCON_ADC_INT_ST) {
+ iowrite32(regtemp, info->regs + NPCM_ADCCON);
+ wake_up_interruptible(&info->wq);
+ info->int_status = true;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int npcm_adc_read(struct npcm_adc *info, int *val, u8 channel)
+{
+ int ret;
+ u32 regtemp;
+
+ /* Select ADC channel */
+ regtemp = ioread32(info->regs + NPCM_ADCCON);
+ regtemp &= ~NPCM_ADCCON_CH_MASK;
+ info->int_status = false;
+ iowrite32(regtemp | NPCM_ADCCON_CH(channel) |
+ NPCM_ADCCON_ADC_CONV, info->regs + NPCM_ADCCON);
+
+ ret = wait_event_interruptible_timeout(info->wq, info->int_status,
+ msecs_to_jiffies(10));
+ if (ret == 0) {
+ regtemp = ioread32(info->regs + NPCM_ADCCON);
+ if ((regtemp & NPCM_ADCCON_ADC_CONV) && info->rst_regmap) {
+ /* if conversion failed - reset ADC module */
+ regmap_write(info->rst_regmap, NPCM7XX_IPSRST1_OFFSET,
+ NPCM7XX_IPSRST1_ADC_RST);
+ msleep(100);
+ regmap_write(info->rst_regmap, NPCM7XX_IPSRST1_OFFSET,
+ 0x0);
+ msleep(100);
+
+ /* Enable ADC and start conversion module */
+ iowrite32(NPCM_ADC_ENABLE | NPCM_ADCCON_ADC_CONV,
+ info->regs + NPCM_ADCCON);
+ dev_err(info->dev, "RESET ADC Complete\n");
+ }
+ return -ETIMEDOUT;
+ }
+ if (ret < 0)
+ return ret;
+
+ *val = NPCM_ADC_DATA_MASK(ioread32(info->regs + NPCM_ADCDATA));
+
+ return 0;
+}
+
+static int npcm_adc_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ int ret;
+ int vref_uv;
+ struct npcm_adc *info = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ mutex_lock(&indio_dev->mlock);
+ ret = npcm_adc_read(info, val, chan->channel);
+ mutex_unlock(&indio_dev->mlock);
+ if (ret) {
+ dev_err(info->dev, "NPCM ADC read failed\n");
+ return ret;
+ }
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ if (info->vref) {
+ vref_uv = regulator_get_voltage(info->vref);
+ *val = vref_uv / 1000;
+ } else {
+ *val = NPCM_INT_VREF_MV;
+ }
+ *val2 = NPCM_RESOLUTION_BITS;
+ return IIO_VAL_FRACTIONAL_LOG2;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ *val = info->adc_sample_hz;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct iio_info npcm_adc_iio_info = {
+ .read_raw = &npcm_adc_read_raw,
+};
+
+static const struct of_device_id npcm_adc_match[] = {
+ { .compatible = "nuvoton,npcm750-adc", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, npcm_adc_match);
+
+static int npcm_adc_probe(struct platform_device *pdev)
+{
+ int ret;
+ int irq;
+ u32 div;
+ u32 reg_con;
+ struct resource *res;
+ struct npcm_adc *info;
+ struct iio_dev *indio_dev;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = pdev->dev.of_node;
+
+ indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*info));
+ if (!indio_dev)
+ return -ENOMEM;
+ info = iio_priv(indio_dev);
+
+ info->dev = &pdev->dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ info->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(info->regs))
+ return PTR_ERR(info->regs);
+
+ info->adc_clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(info->adc_clk)) {
+ dev_warn(&pdev->dev, "ADC clock failed: can't read clk\n");
+ return PTR_ERR(info->adc_clk);
+ }
+
+ /* calculate ADC clock sample rate */
+ reg_con = ioread32(info->regs + NPCM_ADCCON);
+ div = reg_con & NPCM_ADCCON_DIV_MASK;
+ div = div >> NPCM_ADCCON_DIV_SHIFT;
+ info->adc_sample_hz = clk_get_rate(info->adc_clk) / ((div + 1) * 2);
+
+ if (of_device_is_compatible(np, "nuvoton,npcm750-adc")) {
+ info->rst_regmap = syscon_regmap_lookup_by_compatible
+ ("nuvoton,npcm750-rst");
+ if (IS_ERR(info->rst_regmap)) {
+ dev_err(&pdev->dev, "Failed to find nuvoton,npcm750-rst\n");
+ ret = PTR_ERR(info->rst_regmap);
+ goto err_disable_clk;
+ }
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0) {
+ dev_err(dev, "failed getting interrupt resource\n");
+ ret = -EINVAL;
+ goto err_disable_clk;
+ }
+
+ ret = devm_request_irq(&pdev->dev, irq, npcm_adc_isr, 0,
+ "NPCM_ADC", indio_dev);
+ if (ret < 0) {
+ dev_err(dev, "failed requesting interrupt\n");
+ goto err_disable_clk;
+ }
+
+ reg_con = ioread32(info->regs + NPCM_ADCCON);
+ info->vref = devm_regulator_get_optional(&pdev->dev, "vref");
+ if (!IS_ERR(info->vref)) {
+ ret = regulator_enable(info->vref);
+ if (ret) {
+ dev_err(&pdev->dev, "Can't enable ADC reference voltage\n");
+ goto err_disable_clk;
+ }
+
+ iowrite32(reg_con & ~NPCM_ADCCON_REFSEL,
+ info->regs + NPCM_ADCCON);
+ } else {
+ /*
+ * Any error which is not ENODEV indicates the regulator
+ * has been specified and so is a failure case.
+ */
+ if (PTR_ERR(info->vref) != -ENODEV) {
+ ret = PTR_ERR(info->vref);
+ goto err_disable_clk;
+ }
+
+ /* Use internal reference */
+ iowrite32(reg_con | NPCM_ADCCON_REFSEL,
+ info->regs + NPCM_ADCCON);
+ }
+
+ init_waitqueue_head(&info->wq);
+
+ reg_con = ioread32(info->regs + NPCM_ADCCON);
+ reg_con |= NPCM_ADC_ENABLE;
+
+ /* Enable the ADC Module */
+ iowrite32(reg_con, info->regs + NPCM_ADCCON);
+
+ /* Start ADC conversion */
+ iowrite32(reg_con | NPCM_ADCCON_ADC_CONV, info->regs + NPCM_ADCCON);
+
+ platform_set_drvdata(pdev, indio_dev);
+ indio_dev->name = dev_name(&pdev->dev);
+ indio_dev->dev.parent = &pdev->dev;
+ indio_dev->info = &npcm_adc_iio_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = npcm_adc_iio_channels;
+ indio_dev->num_channels = ARRAY_SIZE(npcm_adc_iio_channels);
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "Couldn't register the device.\n");
+ goto err_iio_register;
+ }
+
+ pr_info("NPCM ADC driver probed\n");
+
+ return 0;
+
+err_iio_register:
+ iowrite32(reg_con & ~NPCM_ADCCON_ADC_EN, info->regs + NPCM_ADCCON);
+ if (!IS_ERR(info->vref))
+ regulator_disable(info->vref);
+err_disable_clk:
+ clk_disable_unprepare(info->adc_clk);
+
+ return ret;
+}
+
+static int npcm_adc_remove(struct platform_device *pdev)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct npcm_adc *info = iio_priv(indio_dev);
+ u32 regtemp;
+
+ iio_device_unregister(indio_dev);
+
+ regtemp = ioread32(info->regs + NPCM_ADCCON);
+ iowrite32(regtemp & ~NPCM_ADCCON_ADC_EN, info->regs + NPCM_ADCCON);
+ if (!IS_ERR(info->vref))
+ regulator_disable(info->vref);
+ clk_disable_unprepare(info->adc_clk);
+
+ return 0;
+}
+
+static struct platform_driver npcm_adc_driver = {
+ .probe = npcm_adc_probe,
+ .remove = npcm_adc_remove,
+ .driver = {
+ .name = "npcm_adc",
+ .of_match_table = npcm_adc_match,
+ },
+};
+
+module_platform_driver(npcm_adc_driver);
+
+MODULE_DESCRIPTION("Nuvoton NPCM ADC Driver");
+MODULE_AUTHOR("Tomer Maimon <tomer.maimon@nuvoton.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/adc/ti-ads124s08.c b/drivers/iio/adc/ti-ads124s08.c
new file mode 100644
index 000000000000..53f17e4f2f23
--- /dev/null
+++ b/drivers/iio/adc/ti-ads124s08.c
@@ -0,0 +1,376 @@
+// SPDX-License-Identifier: GPL-2.0
+/* TI ADS124S0X chip family driver
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ */
+
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+
+#include <linux/gpio/consumer.h>
+#include <linux/spi/spi.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/sysfs.h>
+
+/* Commands */
+#define ADS124S08_CMD_NOP 0x00
+#define ADS124S08_CMD_WAKEUP 0x02
+#define ADS124S08_CMD_PWRDWN 0x04
+#define ADS124S08_CMD_RESET 0x06
+#define ADS124S08_CMD_START 0x08
+#define ADS124S08_CMD_STOP 0x0a
+#define ADS124S08_CMD_SYOCAL 0x16
+#define ADS124S08_CMD_SYGCAL 0x17
+#define ADS124S08_CMD_SFOCAL 0x19
+#define ADS124S08_CMD_RDATA 0x12
+#define ADS124S08_CMD_RREG 0x20
+#define ADS124S08_CMD_WREG 0x40
+
+/* Registers */
+#define ADS124S08_ID_REG 0x00
+#define ADS124S08_STATUS 0x01
+#define ADS124S08_INPUT_MUX 0x02
+#define ADS124S08_PGA 0x03
+#define ADS124S08_DATA_RATE 0x04
+#define ADS124S08_REF 0x05
+#define ADS124S08_IDACMAG 0x06
+#define ADS124S08_IDACMUX 0x07
+#define ADS124S08_VBIAS 0x08
+#define ADS124S08_SYS 0x09
+#define ADS124S08_OFCAL0 0x0a
+#define ADS124S08_OFCAL1 0x0b
+#define ADS124S08_OFCAL2 0x0c
+#define ADS124S08_FSCAL0 0x0d
+#define ADS124S08_FSCAL1 0x0e
+#define ADS124S08_FSCAL2 0x0f
+#define ADS124S08_GPIODAT 0x10
+#define ADS124S08_GPIOCON 0x11
+
+/* ADS124S0x common channels */
+#define ADS124S08_AIN0 0x00
+#define ADS124S08_AIN1 0x01
+#define ADS124S08_AIN2 0x02
+#define ADS124S08_AIN3 0x03
+#define ADS124S08_AIN4 0x04
+#define ADS124S08_AIN5 0x05
+#define ADS124S08_AINCOM 0x0c
+/* ADS124S08 only channels */
+#define ADS124S08_AIN6 0x06
+#define ADS124S08_AIN7 0x07
+#define ADS124S08_AIN8 0x08
+#define ADS124S08_AIN9 0x09
+#define ADS124S08_AIN10 0x0a
+#define ADS124S08_AIN11 0x0b
+#define ADS124S08_MAX_CHANNELS 12
+
+#define ADS124S08_POS_MUX_SHIFT 0x04
+#define ADS124S08_INT_REF 0x09
+
+#define ADS124S08_START_REG_MASK 0x1f
+#define ADS124S08_NUM_BYTES_MASK 0x1f
+
+#define ADS124S08_START_CONV 0x01
+#define ADS124S08_STOP_CONV 0x00
+
+enum ads124s_id {
+ ADS124S08_ID,
+ ADS124S06_ID,
+};
+
+struct ads124s_chip_info {
+ const struct iio_chan_spec *channels;
+ unsigned int num_channels;
+};
+
+struct ads124s_private {
+ const struct ads124s_chip_info *chip_info;
+ struct gpio_desc *reset_gpio;
+ struct spi_device *spi;
+ struct mutex lock;
+ u8 data[5] ____cacheline_aligned;
+};
+
+#define ADS124S08_CHAN(index) \
+{ \
+ .type = IIO_VOLTAGE, \
+ .indexed = 1, \
+ .channel = index, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .scan_index = index, \
+ .scan_type = { \
+ .sign = 'u', \
+ .realbits = 32, \
+ .storagebits = 32, \
+ }, \
+}
+
+static const struct iio_chan_spec ads124s06_channels[] = {
+ ADS124S08_CHAN(0),
+ ADS124S08_CHAN(1),
+ ADS124S08_CHAN(2),
+ ADS124S08_CHAN(3),
+ ADS124S08_CHAN(4),
+ ADS124S08_CHAN(5),
+};
+
+static const struct iio_chan_spec ads124s08_channels[] = {
+ ADS124S08_CHAN(0),
+ ADS124S08_CHAN(1),
+ ADS124S08_CHAN(2),
+ ADS124S08_CHAN(3),
+ ADS124S08_CHAN(4),
+ ADS124S08_CHAN(5),
+ ADS124S08_CHAN(6),
+ ADS124S08_CHAN(7),
+ ADS124S08_CHAN(8),
+ ADS124S08_CHAN(9),
+ ADS124S08_CHAN(10),
+ ADS124S08_CHAN(11),
+};
+
+static const struct ads124s_chip_info ads124s_chip_info_tbl[] = {
+ [ADS124S08_ID] = {
+ .channels = ads124s08_channels,
+ .num_channels = ARRAY_SIZE(ads124s08_channels),
+ },
+ [ADS124S06_ID] = {
+ .channels = ads124s06_channels,
+ .num_channels = ARRAY_SIZE(ads124s06_channels),
+ },
+};
+
+static int ads124s_write_cmd(struct iio_dev *indio_dev, u8 command)
+{
+ struct ads124s_private *priv = iio_priv(indio_dev);
+
+ priv->data[0] = command;
+
+ return spi_write(priv->spi, &priv->data[0], 1);
+}
+
+static int ads124s_write_reg(struct iio_dev *indio_dev, u8 reg, u8 data)
+{
+ struct ads124s_private *priv = iio_priv(indio_dev);
+
+ priv->data[0] = ADS124S08_CMD_WREG | reg;
+ priv->data[1] = 0x0;
+ priv->data[2] = data;
+
+ return spi_write(priv->spi, &priv->data[0], 3);
+}
+
+static int ads124s_reset(struct iio_dev *indio_dev)
+{
+ struct ads124s_private *priv = iio_priv(indio_dev);
+
+ if (priv->reset_gpio) {
+ gpiod_set_value(priv->reset_gpio, 0);
+ udelay(200);
+ gpiod_set_value(priv->reset_gpio, 1);
+ } else {
+ return ads124s_write_cmd(indio_dev, ADS124S08_CMD_RESET);
+ }
+
+ return 0;
+};
+
+static int ads124s_read(struct iio_dev *indio_dev, unsigned int chan)
+{
+ struct ads124s_private *priv = iio_priv(indio_dev);
+ int ret;
+ u32 tmp;
+ struct spi_transfer t[] = {
+ {
+ .tx_buf = &priv->data[0],
+ .len = 4,
+ .cs_change = 1,
+ }, {
+ .tx_buf = &priv->data[1],
+ .rx_buf = &priv->data[1],
+ .len = 4,
+ },
+ };
+
+ priv->data[0] = ADS124S08_CMD_RDATA;
+ memset(&priv->data[1], ADS124S08_CMD_NOP, sizeof(priv->data));
+
+ ret = spi_sync_transfer(priv->spi, t, ARRAY_SIZE(t));
+ if (ret < 0)
+ return ret;
+
+ tmp = priv->data[2] << 16 | priv->data[3] << 8 | priv->data[4];
+
+ return tmp;
+}
+
+static int ads124s_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long m)
+{
+ struct ads124s_private *priv = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&priv->lock);
+ switch (m) {
+ case IIO_CHAN_INFO_RAW:
+ ret = ads124s_write_reg(indio_dev, ADS124S08_INPUT_MUX,
+ chan->channel);
+ if (ret) {
+ dev_err(&priv->spi->dev, "Set ADC CH failed\n");
+ goto out;
+ }
+
+ ret = ads124s_write_cmd(indio_dev, ADS124S08_START_CONV);
+ if (ret) {
+ dev_err(&priv->spi->dev, "Start conversions failed\n");
+ goto out;
+ }
+
+ ret = ads124s_read(indio_dev, chan->channel);
+ if (ret < 0) {
+ dev_err(&priv->spi->dev, "Read ADC failed\n");
+ goto out;
+ }
+
+ *val = ret;
+
+ ret = ads124s_write_cmd(indio_dev, ADS124S08_STOP_CONV);
+ if (ret) {
+ dev_err(&priv->spi->dev, "Stop conversions failed\n");
+ goto out;
+ }
+
+ ret = IIO_VAL_INT;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+out:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static const struct iio_info ads124s_info = {
+ .read_raw = &ads124s_read_raw,
+};
+
+static irqreturn_t ads124s_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct ads124s_private *priv = iio_priv(indio_dev);
+ u32 buffer[ADS124S08_MAX_CHANNELS + sizeof(s64)/sizeof(u16)];
+ int scan_index, j = 0;
+ int ret;
+
+ for_each_set_bit(scan_index, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ ret = ads124s_write_reg(indio_dev, ADS124S08_INPUT_MUX,
+ scan_index);
+ if (ret)
+ dev_err(&priv->spi->dev, "Set ADC CH failed\n");
+
+ ret = ads124s_write_cmd(indio_dev, ADS124S08_START_CONV);
+ if (ret)
+ dev_err(&priv->spi->dev, "Start ADC conversions failed\n");
+
+ buffer[j] = ads124s_read(indio_dev, scan_index);
+ ret = ads124s_write_cmd(indio_dev, ADS124S08_STOP_CONV);
+ if (ret)
+ dev_err(&priv->spi->dev, "Stop ADC conversions failed\n");
+
+ j++;
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, buffer,
+ pf->timestamp);
+
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static int ads124s_probe(struct spi_device *spi)
+{
+ struct ads124s_private *ads124s_priv;
+ struct iio_dev *indio_dev;
+ const struct spi_device_id *spi_id = spi_get_device_id(spi);
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*ads124s_priv));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ ads124s_priv = iio_priv(indio_dev);
+
+ ads124s_priv->reset_gpio = devm_gpiod_get_optional(&spi->dev,
+ "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(ads124s_priv->reset_gpio))
+ dev_info(&spi->dev, "Reset GPIO not defined\n");
+
+ ads124s_priv->chip_info = &ads124s_chip_info_tbl[spi_id->driver_data];
+
+ spi_set_drvdata(spi, indio_dev);
+
+ ads124s_priv->spi = spi;
+
+ indio_dev->name = spi_id->name;
+ indio_dev->dev.parent = &spi->dev;
+ indio_dev->dev.of_node = spi->dev.of_node;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = ads124s_priv->chip_info->channels;
+ indio_dev->num_channels = ads124s_priv->chip_info->num_channels;
+ indio_dev->info = &ads124s_info;
+
+ mutex_init(&ads124s_priv->lock);
+
+ ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev, NULL,
+ ads124s_trigger_handler, NULL);
+ if (ret) {
+ dev_err(&spi->dev, "iio triggered buffer setup failed\n");
+ return ret;
+ }
+
+ ads124s_reset(indio_dev);
+
+ return devm_iio_device_register(&spi->dev, indio_dev);
+}
+
+static const struct spi_device_id ads124s_id[] = {
+ { "ads124s06", ADS124S06_ID },
+ { "ads124s08", ADS124S08_ID },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, ads124s_id);
+
+static const struct of_device_id ads124s_of_table[] = {
+ { .compatible = "ti,ads124s06" },
+ { .compatible = "ti,ads124s08" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, ads124s_of_table);
+
+static struct spi_driver ads124s_driver = {
+ .driver = {
+ .name = "ads124s08",
+ .of_match_table = ads124s_of_table,
+ },
+ .probe = ads124s_probe,
+ .id_table = ads124s_id,
+};
+module_spi_driver(ads124s_driver);
+
+MODULE_AUTHOR("Dan Murphy <dmuprhy@ti.com>");
+MODULE_DESCRIPTION("TI TI_ADS12S0X ADC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c
index 3f6be5ac049a..b13c61539d46 100644
--- a/drivers/iio/adc/xilinx-xadc-core.c
+++ b/drivers/iio/adc/xilinx-xadc-core.c
@@ -1273,8 +1273,10 @@ static int xadc_probe(struct platform_device *pdev)
xadc->threshold[i] = 0xffff;
else
xadc->threshold[i] = 0;
- xadc_write_adc_reg(xadc, XADC_REG_THRESHOLD(i),
+ ret = xadc_write_adc_reg(xadc, XADC_REG_THRESHOLD(i),
xadc->threshold[i]);
+ if (ret)
+ goto err_free_irq;
}
/* Go to non-buffered mode */