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-rw-r--r--drivers/hwmon/Kconfig9
-rw-r--r--drivers/hwmon/Makefile1
-rw-r--r--drivers/hwmon/max17135-hwmon.c170
-rw-r--r--drivers/mfd/Kconfig7
-rw-r--r--drivers/mfd/Makefile1
-rw-r--r--drivers/mfd/max17135-core.c232
-rw-r--r--drivers/regulator/Kconfig5
-rw-r--r--drivers/regulator/Makefile2
-rw-r--r--drivers/regulator/max17135-regulator.c642
-rw-r--r--include/linux/mfd/max17135.h217
10 files changed, 1285 insertions, 1 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 3cee645028a..010625a26bb 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -692,6 +692,15 @@ config SENSORS_MAX1619
This driver can also be built as a module. If so, the module
will be called max1619.
+config SENSORS_MAX17135
+ tristate "Maxim MAX17135"
+ depends on I2C
+ help
+ If you say yes here you get support for MAX17135 PMIC sensor.
+
+ This driver can also be built as a module. If so, the module
+ will be called max17135_sensor.
+
config SENSORS_MAX6650
tristate "Maxim MAX6650 sensor chip"
depends on I2C && EXPERIMENTAL
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index ad67a2625dd..f3d50745e83 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -84,6 +84,7 @@ obj-$(CONFIG_SENSORS_LTC4245) += ltc4245.o
obj-$(CONFIG_SENSORS_LTC4261) += ltc4261.o
obj-$(CONFIG_SENSORS_MAX1111) += max1111.o
obj-$(CONFIG_SENSORS_MAX1619) += max1619.o
+obj-$(CONFIG_SENSORS_MAX17135) += max17135-hwmon.o
obj-$(CONFIG_SENSORS_MAX6650) += max6650.o
obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o
obj-$(CONFIG_SENSORS_PC87360) += pc87360.o
diff --git a/drivers/hwmon/max17135-hwmon.c b/drivers/hwmon/max17135-hwmon.c
new file mode 100644
index 00000000000..528a76c8a72
--- /dev/null
+++ b/drivers/hwmon/max17135-hwmon.c
@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+/*
+ * max17135.c
+ *
+ * Based on the MAX1619 driver.
+ * Copyright (C) 2003-2004 Alexey Fisher <fishor@mail.ru>
+ * Jean Delvare <khali@linux-fr.org>
+ *
+ * The MAX17135 is a sensor chip made by Maxim.
+ * It reports up to two temperatures (its own plus up to
+ * one external one).
+ */
+
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/sysfs.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/max17135.h>
+
+/*
+ * Conversions
+ */
+static int temp_from_reg(int val)
+{
+ return val >> 8;
+}
+
+/*
+ * Functions declaration
+ */
+static int max17135_sensor_probe(struct platform_device *pdev);
+static int max17135_sensor_remove(struct platform_device *pdev);
+
+/*
+ * Driver data (common to all clients)
+ */
+static struct platform_driver max17135_sensor_driver = {
+ .probe = max17135_sensor_probe,
+ .remove = max17135_sensor_remove,
+ .driver = {
+ .name = "max17135_sensor",
+ },
+};
+
+
+/*
+ * Client data (each client gets its own)
+ */
+struct max17135_data {
+ struct device *hwmon_dev;
+};
+
+/*
+ * Sysfs stuff
+ */
+static ssize_t show_temp_input1(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned int reg_val;
+ max17135_reg_read(REG_MAX17135_INT_TEMP, &reg_val);
+ return snprintf(buf, PAGE_SIZE, "%d\n", temp_from_reg(reg_val));
+}
+
+static ssize_t show_temp_input2(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned int reg_val;
+ max17135_reg_read(REG_MAX17135_EXT_TEMP, &reg_val);
+ return snprintf(buf, PAGE_SIZE, "%d\n", temp_from_reg(reg_val));
+}
+
+static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
+static DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input2, NULL);
+
+static struct attribute *max17135_attributes[] = {
+ &dev_attr_temp1_input.attr,
+ &dev_attr_temp2_input.attr,
+ NULL
+};
+
+static const struct attribute_group max17135_group = {
+ .attrs = max17135_attributes,
+};
+
+/*
+ * Real code
+ */
+static int max17135_sensor_probe(struct platform_device *pdev)
+{
+ struct max17135_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct max17135_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ /* Register sysfs hooks */
+ err = sysfs_create_group(&pdev->dev.kobj, &max17135_group);
+ if (err)
+ goto exit_free;
+
+ data->hwmon_dev = hwmon_device_register(&pdev->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto exit_remove_files;
+ }
+
+ platform_set_drvdata(pdev, data);
+
+ return 0;
+
+exit_remove_files:
+ sysfs_remove_group(&pdev->dev.kobj, &max17135_group);
+exit_free:
+ kfree(data);
+exit:
+ return err;
+}
+
+static int max17135_sensor_remove(struct platform_device *pdev)
+{
+ struct max17135_data *data = platform_get_drvdata(pdev);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&pdev->dev.kobj, &max17135_group);
+
+ kfree(data);
+ return 0;
+}
+
+static int __init sensors_max17135_init(void)
+{
+ return platform_driver_register(&max17135_sensor_driver);
+}
+module_init(sensors_max17135_init);
+
+static void __exit sensors_max17135_exit(void)
+{
+ platform_driver_unregister(&max17135_sensor_driver);
+}
+module_exit(sensors_max17135_exit);
+
+MODULE_DESCRIPTION("MAX17135 sensor driver");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index b727c46a632..52c1b5670d2 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -662,6 +662,13 @@ config MFD_WL1273_CORE
driver connects the radio-wl1273 V4L2 module and the wl1273
audio codec.
+config MFD_MAX17135
+ tristate "MAX17135 PMIC core"
+ depends on I2C
+ help
+ This is the MAX17135 PMIC support. It includes
+ core support for communication with the MAX17135 chip.
+
endif # MFD_SUPPORT
menu "Multimedia Capabilities Port drivers"
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 6e9fc648965..0aa8053a7d2 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -83,6 +83,7 @@ obj-$(CONFIG_MFD_TPS6586X) += tps6586x.o
obj-$(CONFIG_MFD_VX855) += vx855.o
obj-$(CONFIG_MFD_WL1273_CORE) += wl1273-core.o
obj-$(CONFIG_MFD_CS5535) += cs5535-mfd.o
+obj-$(CONFIG_MFD_MAX17135) += max17135-core.o
#ifeq ($(CONFIG_PMIC_DIALOG),y)
da9052-objs := da9052-spi.o da9052-i2c.o da9052-core.o
diff --git a/drivers/mfd/max17135-core.c b/drivers/mfd/max17135-core.c
new file mode 100644
index 00000000000..7629cc59dca
--- /dev/null
+++ b/drivers/mfd/max17135-core.c
@@ -0,0 +1,232 @@
+/*
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+/*!
+ * @file pmic/core/max17135.c
+ * @brief This file contains MAX17135 specific PMIC code. This implementaion
+ * may differ for each PMIC chip.
+ *
+ * @ingroup PMIC_CORE
+ */
+
+/*
+ * Includes
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/uaccess.h>
+
+#include <linux/platform_device.h>
+#include <linux/regulator/machine.h>
+#include <linux/pmic_status.h>
+#include <linux/mfd/max17135.h>
+#include <asm/mach-types.h>
+
+struct i2c_client *max17135_client;
+
+static const unsigned short normal_i2c[] = {0x48, I2C_CLIENT_END};
+
+int max17135_reg_read(int reg_num, unsigned int *reg_val)
+{
+ int result;
+
+ if (max17135_client == NULL)
+ return PMIC_ERROR;
+
+ if ((reg_num == REG_MAX17135_EXT_TEMP) ||
+ (reg_num == REG_MAX17135_INT_TEMP)) {
+ result = i2c_smbus_read_word_data(max17135_client, reg_num);
+ if (result < 0) {
+ dev_err(&max17135_client->dev,
+ "Unable to read MAX17135 register via I2C\n");
+ return PMIC_ERROR;
+ }
+ /* Swap bytes for dword read */
+ result = (result >> 8) | ((result & 0xFF) << 8);
+ } else {
+ result = i2c_smbus_read_byte_data(max17135_client, reg_num);
+ if (result < 0) {
+ dev_err(&max17135_client->dev,
+ "Unable to read MAX17135 register via I2C\n");
+ return PMIC_ERROR;
+ }
+ }
+
+ *reg_val = result;
+ return PMIC_SUCCESS;
+}
+
+int max17135_reg_write(int reg_num, const unsigned int reg_val)
+{
+ int result;
+
+ if (max17135_client == NULL)
+ return PMIC_ERROR;
+
+ result = i2c_smbus_write_byte_data(max17135_client, reg_num, reg_val);
+ if (result < 0) {
+ dev_err(&max17135_client->dev,
+ "Unable to write MAX17135 register via I2C\n");
+ return PMIC_ERROR;
+ }
+
+ return PMIC_SUCCESS;
+}
+
+static int max17135_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct max17135 *max17135;
+ struct max17135_platform_data *pdata = client->dev.platform_data;
+ int ret = 0;
+
+ if (!pdata || !pdata->init)
+ return -ENODEV;
+
+ /* Create the PMIC data structure */
+ max17135 = kzalloc(sizeof(struct max17135), GFP_KERNEL);
+ if (max17135 == NULL) {
+ kfree(client);
+ return -ENOMEM;
+ }
+
+ /* Initialize the PMIC data structure */
+ i2c_set_clientdata(client, max17135);
+ max17135->dev = &client->dev;
+ max17135->i2c_client = client;
+
+ max17135_client = client;
+
+ if (pdata && pdata->init) {
+ ret = pdata->init(max17135);
+ if (ret != 0)
+ goto err;
+ }
+
+ dev_info(&client->dev, "PMIC MAX17135 for eInk display\n");
+
+ return ret;
+err:
+ kfree(max17135);
+
+ return ret;
+}
+
+
+static int max17135_remove(struct i2c_client *i2c)
+{
+ struct max17135 *max17135 = i2c_get_clientdata(i2c);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(max17135->pdev); i++)
+ platform_device_unregister(max17135->pdev[i]);
+
+ kfree(max17135);
+
+ return 0;
+}
+
+static int max17135_suspend(struct i2c_client *client, pm_message_t state)
+{
+ return 0;
+}
+
+static int max17135_resume(struct i2c_client *client)
+{
+ return 0;
+}
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int max17135_detect(struct i2c_client *client,
+ struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ u8 chip_rev, chip_id;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ /* detection */
+ if (i2c_smbus_read_byte_data(client,
+ REG_MAX17135_PRODUCT_REV) != 0) {
+ dev_err(&adapter->dev,
+ "Max17135 PMIC not found!\n");
+ return -ENODEV;
+ }
+
+ /* identification */
+ chip_rev = i2c_smbus_read_byte_data(client,
+ REG_MAX17135_PRODUCT_REV);
+ chip_id = i2c_smbus_read_byte_data(client,
+ REG_MAX17135_PRODUCT_ID);
+
+ if (chip_rev != 0x00 || chip_id != 0x4D) { /* identification failed */
+ dev_info(&adapter->dev,
+ "Unsupported chip (man_id=0x%02X, "
+ "chip_id=0x%02X).\n", chip_rev, chip_id);
+ return -ENODEV;
+ }
+
+ strlcpy(info->type, "max17135_sensor", I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static const struct i2c_device_id max17135_id[] = {
+ { "max17135", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max17135_id);
+
+
+static struct i2c_driver max17135_driver = {
+ .driver = {
+ .name = "max17135",
+ .owner = THIS_MODULE,
+ },
+ .probe = max17135_probe,
+ .remove = max17135_remove,
+ .suspend = max17135_suspend,
+ .resume = max17135_resume,
+ .id_table = max17135_id,
+ .detect = max17135_detect,
+ .address_list = &normal_i2c[0],
+};
+
+static int __init max17135_init(void)
+{
+ return i2c_add_driver(&max17135_driver);
+}
+
+static void __exit max17135_exit(void)
+{
+ i2c_del_driver(&max17135_driver);
+}
+
+/*
+ * Module entry points
+ */
+subsys_initcall_sync(max17135_init);
+module_exit(max17135_exit);
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index ab3e1fcd825..a3520dbd727 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -272,6 +272,11 @@ config REGULATOR_TPS6524X
serial interface currently supported on the sequencer serial
port controller.
+config REGULATOR_MAX17135
+ tristate "Maxim MAX17135 Regulator Support"
+ depends on MFD_MAX17135
+ default n
+
config REGULATOR_DA9052
tristate "Dialog DA9052 regulators"
depends on PMIC_DIALOG
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index a1840b5b520..ac537b08e39 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -42,6 +42,6 @@ obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o
obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o
obj-$(CONFIG_REGULATOR_AB8500) += ab8500.o
obj-$(CONFIG_REGULATOR_DA9052) += da9052-regulator.o
-
+obj-$(CONFIG_REGULATOR_MAX17135) += max17135-regulator.o
ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
diff --git a/drivers/regulator/max17135-regulator.c b/drivers/regulator/max17135-regulator.c
new file mode 100644
index 00000000000..97bf2aff8b3
--- /dev/null
+++ b/drivers/regulator/max17135-regulator.c
@@ -0,0 +1,642 @@
+/*
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/driver.h>
+#include <linux/mfd/max17135.h>
+#include <linux/gpio.h>
+
+/*
+ * Regulator definitions
+ * *_MIN_uV - minimum microvolt for regulator
+ * *_MAX_uV - maximum microvolt for regulator
+ * *_STEP_uV - microvolts between regulator output levels
+ * *_MIN_VAL - minimum register field value for regulator
+ * *_MAX_VAL - maximum register field value for regulator
+ */
+#define MAX17135_HVINP_MIN_uV 5000000
+#define MAX17135_HVINP_MAX_uV 20000000
+#define MAX17135_HVINP_STEP_uV 1000000
+#define MAX17135_HVINP_MIN_VAL 0
+#define MAX17135_HVINP_MAX_VAL 1
+
+#define MAX17135_HVINN_MIN_uV 5000000
+#define MAX17135_HVINN_MAX_uV 20000000
+#define MAX17135_HVINN_STEP_uV 1000000
+#define MAX17135_HVINN_MIN_VAL 0
+#define MAX17135_HVINN_MAX_VAL 1
+
+#define MAX17135_GVDD_MIN_uV 5000000
+#define MAX17135_GVDD_MAX_uV 20000000
+#define MAX17135_GVDD_STEP_uV 1000000
+#define MAX17135_GVDD_MIN_VAL 0
+#define MAX17135_GVDD_MAX_VAL 1
+
+#define MAX17135_GVEE_MIN_uV 5000000
+#define MAX17135_GVEE_MAX_uV 20000000
+#define MAX17135_GVEE_STEP_uV 1000000
+#define MAX17135_GVEE_MIN_VAL 0
+#define MAX17135_GVEE_MAX_VAL 1
+
+#define MAX17135_VCOM_MIN_VAL 0
+#define MAX17135_VCOM_MAX_VAL 255
+
+#define MAX17135_VNEG_MIN_uV 5000000
+#define MAX17135_VNEG_MAX_uV 20000000
+#define MAX17135_VNEG_STEP_uV 1000000
+#define MAX17135_VNEG_MIN_VAL 0
+#define MAX17135_VNEG_MAX_VAL 1
+
+#define MAX17135_VPOS_MIN_uV 5000000
+#define MAX17135_VPOS_MAX_uV 20000000
+#define MAX17135_VPOS_STEP_uV 1000000
+#define MAX17135_VPOS_MIN_VAL 0
+#define MAX17135_VPOS_MAX_VAL 1
+
+struct max17135_vcom_programming_data {
+ int vcom_min_uV;
+ int vcom_max_uV;
+ int vcom_step_uV;
+};
+
+static long unsigned int max17135_pass_num = { 1 };
+static int max17135_vcom = { -1250000 };
+
+struct max17135_vcom_programming_data vcom_data[2] = {
+ {
+ -4325000,
+ -500000,
+ 15000,
+ },
+ {
+ -3050000,
+ -500000,
+ 10000,
+ },
+};
+
+static int max17135_is_power_good(struct max17135 *max17135);
+
+/*
+ * Regulator operations
+ */
+static int max17135_hvinp_set_voltage(struct regulator_dev *reg,
+ int minuV, int uV, unsigned *selector)
+{
+ unsigned int reg_val;
+ unsigned int fld_val;
+
+ if ((uV >= MAX17135_HVINP_MIN_uV) &&
+ (uV <= MAX17135_HVINP_MAX_uV))
+ fld_val = (uV - MAX17135_HVINP_MIN_uV) /
+ MAX17135_HVINP_STEP_uV;
+ else
+ return -EINVAL;
+
+ max17135_reg_read(REG_MAX17135_HVINP, &reg_val);
+
+ reg_val &= ~BITFMASK(HVINP);
+ reg_val |= BITFVAL(HVINP, fld_val); /* shift to correct bit */
+
+ return max17135_reg_write(REG_MAX17135_HVINP, reg_val);
+}
+
+static int max17135_hvinp_get_voltage(struct regulator_dev *reg)
+{
+ unsigned int reg_val;
+ unsigned int fld_val;
+ int volt;
+
+ max17135_reg_read(REG_MAX17135_HVINP, &reg_val);
+
+ fld_val = (reg_val & BITFMASK(HVINP)) >> HVINP_LSH;
+
+ if ((fld_val >= MAX17135_HVINP_MIN_VAL) &&
+ (fld_val <= MAX17135_HVINP_MAX_VAL)) {
+ volt = (fld_val * MAX17135_HVINP_STEP_uV) +
+ MAX17135_HVINP_MIN_uV;
+ } else {
+ printk(KERN_ERR "MAX17135: HVINP voltage is out of range\n");
+ volt = 0;
+ }
+ return volt;
+}
+
+static int max17135_hvinp_enable(struct regulator_dev *reg)
+{
+ return 0;
+}
+
+static int max17135_hvinp_disable(struct regulator_dev *reg)
+{
+ return 0;
+}
+
+/* Convert uV to the VCOM register bitfield setting */
+static inline int vcom_uV_to_rs(int uV, int pass_num)
+{
+ return (vcom_data[pass_num].vcom_max_uV - uV)
+ / vcom_data[pass_num].vcom_step_uV;
+}
+
+/* Convert the VCOM register bitfield setting to uV */
+static inline int vcom_rs_to_uV(int rs, int pass_num)
+{
+ return vcom_data[pass_num].vcom_max_uV
+ - (vcom_data[pass_num].vcom_step_uV * rs);
+}
+
+static int max17135_vcom_set_voltage(struct regulator_dev *reg,
+ int minuV, int uV, unsigned *selector)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+ unsigned int reg_val;
+ int vcom_read;
+
+ if ((uV < vcom_data[max17135->pass_num-1].vcom_min_uV)
+ || (uV > vcom_data[max17135->pass_num-1].vcom_max_uV))
+ return -EINVAL;
+
+ max17135_reg_read(REG_MAX17135_DVR, &reg_val);
+
+ /*
+ * Only program VCOM if it is not set to the desired value.
+ * Programming VCOM excessively degrades ability to keep
+ * DVR register value persistent.
+ */
+ vcom_read = vcom_rs_to_uV(reg_val, max17135->pass_num-1);
+ if (vcom_read != max17135->vcom_uV) {
+ reg_val &= ~BITFMASK(DVR);
+ reg_val |= BITFVAL(DVR, vcom_uV_to_rs(uV,
+ max17135->pass_num-1));
+ max17135_reg_write(REG_MAX17135_DVR, reg_val);
+
+ reg_val = BITFVAL(CTRL_DVR, true); /* shift to correct bit */
+ return max17135_reg_write(REG_MAX17135_PRGM_CTRL, reg_val);
+ }
+
+ return 0;
+}
+
+static int max17135_vcom_get_voltage(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+ unsigned int reg_val;
+
+ max17135_reg_read(REG_MAX17135_DVR, &reg_val);
+ return vcom_rs_to_uV(BITFEXT(reg_val, DVR), max17135->pass_num-1);
+}
+
+static int max17135_vcom_enable(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+
+ /*
+ * Check to see if we need to set the VCOM voltage.
+ * Should only be done one time. And, we can
+ * only change vcom voltage if we have been enabled.
+ */
+ if (!max17135->vcom_setup && max17135_is_power_good(max17135)) {
+ max17135_vcom_set_voltage(reg,
+ max17135->vcom_uV,
+ max17135->vcom_uV,
+ NULL);
+ max17135->vcom_setup = true;
+ }
+
+ /* enable VCOM regulator output */
+ if (max17135->pass_num == 1)
+ gpio_set_value(max17135->gpio_pmic_vcom_ctrl, 1);
+ else {
+ unsigned int reg_val;
+
+ max17135_reg_read(REG_MAX17135_ENABLE, &reg_val);
+ reg_val &= ~BITFMASK(VCOM_ENABLE);
+ reg_val |= BITFVAL(VCOM_ENABLE, 1); /* shift to correct bit */
+ max17135_reg_write(REG_MAX17135_ENABLE, reg_val);
+ }
+
+ return 0;
+}
+
+static int max17135_vcom_disable(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+
+ if (max17135->pass_num == 1)
+ gpio_set_value(max17135->gpio_pmic_vcom_ctrl, 0);
+ else {
+ unsigned int reg_val;
+
+ max17135_reg_read(REG_MAX17135_ENABLE, &reg_val);
+ reg_val &= ~BITFMASK(VCOM_ENABLE);
+ max17135_reg_write(REG_MAX17135_ENABLE, reg_val);
+ }
+
+ return 0;
+}
+
+static int max17135_vcom_is_enabled(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+
+ /* read VCOM regulator enable setting */
+ if (max17135->pass_num == 1) {
+ int gpio = gpio_get_value(max17135->gpio_pmic_vcom_ctrl);
+ if (gpio == 0)
+ return 0;
+ else
+ return 1;
+ } else {
+ unsigned int reg_val;
+
+ max17135_reg_read(REG_MAX17135_ENABLE, &reg_val);
+ reg_val &= BITFMASK(VCOM_ENABLE);
+ if (reg_val != 0)
+ return 1;
+ else
+ return 0;
+ }
+}
+
+static int max17135_is_power_good(struct max17135 *max17135)
+{
+ /*
+ * XOR of polarity (starting value) and current
+ * value yields whether power is good.
+ */
+ return gpio_get_value(max17135->gpio_pmic_pwrgood) ^
+ max17135->pwrgood_polarity;
+}
+
+static int max17135_wait_power_good(struct max17135 *max17135)
+{
+ int i;
+
+ for (i = 0; i < max17135->max_wait * 3; i++) {
+ if (max17135_is_power_good(max17135))
+ return 0;
+
+ msleep(1);
+ }
+ return -ETIMEDOUT;
+}
+
+static int max17135_display_enable(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+
+ /* The Pass 1 parts cannot turn on the PMIC via I2C. */
+ if (max17135->pass_num == 1)
+ gpio_set_value(max17135->gpio_pmic_wakeup, 1);
+ else {
+ unsigned int reg_val;
+
+ max17135_reg_read(REG_MAX17135_ENABLE, &reg_val);
+ reg_val &= ~BITFMASK(ENABLE);
+ reg_val |= BITFVAL(ENABLE, 1);
+ max17135_reg_write(REG_MAX17135_ENABLE, reg_val);
+ }
+
+ return max17135_wait_power_good(max17135);
+}
+
+static int max17135_display_disable(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+
+ if (max17135->pass_num == 1)
+ gpio_set_value(max17135->gpio_pmic_wakeup, 0);
+ else {
+ unsigned int reg_val;
+
+ max17135_reg_read(REG_MAX17135_ENABLE, &reg_val);
+ reg_val &= ~BITFMASK(ENABLE);
+ max17135_reg_write(REG_MAX17135_ENABLE, reg_val);
+ }
+
+ msleep(max17135->max_wait);
+
+ return 0;
+}
+
+static int max17135_display_is_enabled(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+ int gpio = gpio_get_value(max17135->gpio_pmic_wakeup);
+
+ if (gpio == 0)
+ return 0;
+ else
+ return 1;
+}
+
+/*
+ * Regulator operations
+ */
+
+static struct regulator_ops max17135_display_ops = {
+ .enable = max17135_display_enable,
+ .disable = max17135_display_disable,
+ .is_enabled = max17135_display_is_enabled,
+};
+
+static struct regulator_ops max17135_gvdd_ops = {
+};
+
+static struct regulator_ops max17135_gvee_ops = {
+};
+
+static struct regulator_ops max17135_hvinn_ops = {
+};
+
+static struct regulator_ops max17135_hvinp_ops = {
+ .enable = max17135_hvinp_enable,
+ .disable = max17135_hvinp_disable,
+ .get_voltage = max17135_hvinp_get_voltage,
+ .set_voltage = max17135_hvinp_set_voltage,
+};
+
+static struct regulator_ops max17135_vcom_ops = {
+ .enable = max17135_vcom_enable,
+ .disable = max17135_vcom_disable,
+ .get_voltage = max17135_vcom_get_voltage,
+ .set_voltage = max17135_vcom_set_voltage,
+ .is_enabled = max17135_vcom_is_enabled,
+};
+
+static struct regulator_ops max17135_vneg_ops = {
+};
+
+static struct regulator_ops max17135_vpos_ops = {
+};
+
+/*
+ * Regulator descriptors
+ */
+static struct regulator_desc max17135_reg[MAX17135_NUM_REGULATORS] = {
+{
+ .name = "DISPLAY",
+ .id = MAX17135_DISPLAY,
+ .ops = &max17135_display_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "GVDD",
+ .id = MAX17135_GVDD,
+ .ops = &max17135_gvdd_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "GVEE",
+ .id = MAX17135_GVEE,
+ .ops = &max17135_gvee_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "HVINN",
+ .id = MAX17135_HVINN,
+ .ops = &max17135_hvinn_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "HVINP",
+ .id = MAX17135_HVINP,
+ .ops = &max17135_hvinp_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "VCOM",
+ .id = MAX17135_VCOM,
+ .ops = &max17135_vcom_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "VNEG",
+ .id = MAX17135_VNEG,
+ .ops = &max17135_vneg_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "VPOS",
+ .id = MAX17135_VPOS,
+ .ops = &max17135_vpos_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+};
+
+static void max17135_setup_timings(struct max17135 *max17135)
+{
+ unsigned int reg_val;
+
+ int timing1, timing2, timing3, timing4,
+ timing5, timing6, timing7, timing8;
+
+ max17135_reg_read(REG_MAX17135_TIMING1, &timing1);
+ max17135_reg_read(REG_MAX17135_TIMING2, &timing2);
+ max17135_reg_read(REG_MAX17135_TIMING3, &timing3);
+ max17135_reg_read(REG_MAX17135_TIMING4, &timing4);
+ max17135_reg_read(REG_MAX17135_TIMING5, &timing5);
+ max17135_reg_read(REG_MAX17135_TIMING6, &timing6);
+ max17135_reg_read(REG_MAX17135_TIMING7, &timing7);
+ max17135_reg_read(REG_MAX17135_TIMING8, &timing8);
+
+ if ((timing1 != max17135->gvee_pwrup) ||
+ (timing2 != max17135->vneg_pwrup) ||
+ (timing3 != max17135->vpos_pwrup) ||
+ (timing4 != max17135->gvdd_pwrup) ||
+ (timing5 != max17135->gvdd_pwrdn) ||
+ (timing6 != max17135->vpos_pwrdn) ||
+ (timing7 != max17135->vneg_pwrdn) ||
+ (timing8 != max17135->gvee_pwrdn)) {
+ max17135_reg_write(REG_MAX17135_TIMING1, max17135->gvee_pwrup);
+ max17135_reg_write(REG_MAX17135_TIMING2, max17135->vneg_pwrup);
+ max17135_reg_write(REG_MAX17135_TIMING3, max17135->vpos_pwrup);
+ max17135_reg_write(REG_MAX17135_TIMING4, max17135->gvdd_pwrup);
+ max17135_reg_write(REG_MAX17135_TIMING5, max17135->gvdd_pwrdn);
+ max17135_reg_write(REG_MAX17135_TIMING6, max17135->vpos_pwrdn);
+ max17135_reg_write(REG_MAX17135_TIMING7, max17135->vneg_pwrdn);
+ max17135_reg_write(REG_MAX17135_TIMING8, max17135->gvee_pwrdn);
+
+ reg_val = BITFVAL(CTRL_TIMING, true); /* shift to correct bit */
+ max17135_reg_write(REG_MAX17135_PRGM_CTRL, reg_val);
+ }
+}
+
+
+/*
+ * Regulator init/probing/exit functions
+ */
+static int max17135_regulator_probe(struct platform_device *pdev)
+{
+ struct regulator_dev *rdev;
+
+ rdev = regulator_register(&max17135_reg[pdev->id], &pdev->dev,
+ pdev->dev.platform_data,
+ dev_get_drvdata(&pdev->dev));
+
+ if (IS_ERR(rdev)) {
+ dev_err(&pdev->dev, "failed to register %s\n",
+ max17135_reg[pdev->id].name);
+ return PTR_ERR(rdev);
+ }
+
+ return 0;
+}
+
+static int max17135_regulator_remove(struct platform_device *pdev)
+{
+ struct regulator_dev *rdev = platform_get_drvdata(pdev);
+ regulator_unregister(rdev);
+ return 0;
+}
+
+static struct platform_driver max17135_regulator_driver = {
+ .probe = max17135_regulator_probe,
+ .remove = max17135_regulator_remove,
+ .driver = {
+ .name = "max17135-reg",
+ },
+};
+
+int max17135_register_regulator(struct max17135 *max17135, int reg,
+ struct regulator_init_data *initdata)
+{
+ struct platform_device *pdev;
+ int ret;
+
+ struct i2c_client *client = max17135->i2c_client;
+ /* If we can't find PMIC via I2C, we should not register regulators */
+ if (i2c_smbus_read_byte_data(client,
+ REG_MAX17135_PRODUCT_REV) != 0) {
+ dev_err(max17135->dev,
+ "Max17135 PMIC not found!\n");
+ return -ENXIO;
+ }
+
+ if (max17135->pdev[reg])
+ return -EBUSY;
+
+ pdev = platform_device_alloc("max17135-reg", reg);
+ if (!pdev)
+ return -ENOMEM;
+
+ max17135->pdev[reg] = pdev;
+
+ initdata->driver_data = max17135;
+
+ pdev->dev.platform_data = initdata;
+ pdev->dev.parent = max17135->dev;
+ platform_set_drvdata(pdev, max17135);
+
+ ret = platform_device_add(pdev);
+
+ if (ret != 0) {
+ dev_err(max17135->dev,
+ "Failed to register regulator %d: %d\n",
+ reg, ret);
+ platform_device_del(pdev);
+ max17135->pdev[reg] = NULL;
+ }
+
+ if (!max17135->init_done) {
+ max17135->pass_num = max17135_pass_num;
+ max17135->vcom_uV = max17135_vcom;
+
+ /*
+ * Set up PMIC timing values.
+ * Should only be done one time! Timing values may only be
+ * changed a limited number of times according to spec.
+ */
+ max17135_setup_timings(max17135);
+
+ max17135->pwrgood_polarity =
+ gpio_get_value(max17135->gpio_pmic_pwrgood);
+
+ max17135->init_done = true;
+ }
+
+ return ret;
+}
+
+static int __init max17135_regulator_init(void)
+{
+ return platform_driver_register(&max17135_regulator_driver);
+}
+subsys_initcall(max17135_regulator_init);
+
+static void __exit max17135_regulator_exit(void)
+{
+ platform_driver_unregister(&max17135_regulator_driver);
+}
+module_exit(max17135_regulator_exit);
+
+
+/*
+ * Parse user specified options (`max17135:')
+ * example:
+ * max17135:pass=2,vcom=-1250000
+ */
+static int __init max17135_setup(char *options)
+{
+ int ret;
+ char *opt;
+ while ((opt = strsep(&options, ",")) != NULL) {
+ if (!*opt)
+ continue;
+ if (!strncmp(opt, "pass=", 5)) {
+ ret = strict_strtoul(opt + 5, 0, &max17135_pass_num);
+ if (ret < 0)
+ return ret;
+ }
+ if (!strncmp(opt, "vcom=", 5)) {
+ int offs = 5;
+ if (opt[5] == '-')
+ offs = 6;
+ ret = strict_strtoul(opt + offs, 0,
+ (long *)&max17135_vcom);
+ if (ret < 0)
+ return ret;
+ max17135_vcom = -max17135_vcom;
+ }
+ }
+
+ return 1;
+}
+
+__setup("max17135:", max17135_setup);
+
+/* Module information */
+MODULE_DESCRIPTION("MAX17135 regulator driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/max17135.h b/include/linux/mfd/max17135.h
new file mode 100644
index 00000000000..0a8af30853c
--- /dev/null
+++ b/include/linux/mfd/max17135.h
@@ -0,0 +1,217 @@
+/*
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#ifndef __LINUX_REGULATOR_MAX17135_H_
+#define __LINUX_REGULATOR_MAX17135_H_
+
+/*
+ * PMIC Register Addresses
+ */
+enum {
+ REG_MAX17135_EXT_TEMP = 0x0,
+ REG_MAX17135_CONFIG,
+ REG_MAX17135_INT_TEMP = 0x4,
+ REG_MAX17135_STATUS,
+ REG_MAX17135_PRODUCT_REV,
+ REG_MAX17135_PRODUCT_ID,
+ REG_MAX17135_DVR,
+ REG_MAX17135_ENABLE,
+ REG_MAX17135_FAULT, /*0x0A*/
+ REG_MAX17135_HVINP,
+ REG_MAX17135_PRGM_CTRL,
+ REG_MAX17135_TIMING1 = 0x10, /* Timing regs base address is 0x10 */
+ REG_MAX17135_TIMING2,
+ REG_MAX17135_TIMING3,
+ REG_MAX17135_TIMING4,
+ REG_MAX17135_TIMING5,
+ REG_MAX17135_TIMING6,
+ REG_MAX17135_TIMING7,
+ REG_MAX17135_TIMING8,
+};
+#define MAX17135_REG_NUM 21
+#define MAX17135_MAX_REGISTER 0xFF
+
+/*
+ * Bitfield macros that use rely on bitfield width/shift information.
+ */
+#define BITFMASK(field) (((1U << (field ## _WID)) - 1) << (field ## _LSH))
+#define BITFVAL(field, val) ((val) << (field ## _LSH))
+#define BITFEXT(var, bit) ((var & BITFMASK(bit)) >> (bit ## _LSH))
+
+/*
+ * Shift and width values for each register bitfield
+ */
+#define EXT_TEMP_LSH 7
+#define EXT_TEMP_WID 9
+
+#define THERMAL_SHUTDOWN_LSH 0
+#define THERMAL_SHUTDOWN_WID 1
+
+#define INT_TEMP_LSH 7
+#define INT_TEMP_WID 9
+
+#define STAT_BUSY_LSH 0
+#define STAT_BUSY_WID 1
+#define STAT_OPEN_LSH 1
+#define STAT_OPEN_WID 1
+#define STAT_SHRT_LSH 2
+#define STAT_SHRT_WID 1
+
+#define PROD_REV_LSH 0
+#define PROD_REV_WID 8
+
+#define PROD_ID_LSH 0
+#define PROD_ID_WID 8
+
+#define DVR_LSH 0
+#define DVR_WID 8
+
+#define ENABLE_LSH 0
+#define ENABLE_WID 1
+#define VCOM_ENABLE_LSH 1
+#define VCOM_ENABLE_WID 1
+
+#define FAULT_FBPG_LSH 0
+#define FAULT_FBPG_WID 1
+#define FAULT_HVINP_LSH 1
+#define FAULT_HVINP_WID 1
+#define FAULT_HVINN_LSH 2
+#define FAULT_HVINN_WID 1
+#define FAULT_FBNG_LSH 3
+#define FAULT_FBNG_WID 1
+#define FAULT_HVINPSC_LSH 4
+#define FAULT_HVINPSC_WID 1
+#define FAULT_HVINNSC_LSH 5
+#define FAULT_HVINNSC_WID 1
+#define FAULT_OT_LSH 6
+#define FAULT_OT_WID 1
+#define FAULT_POK_LSH 7
+#define FAULT_POK_WID 1
+
+#define HVINP_LSH 0
+#define HVINP_WID 4
+
+#define CTRL_DVR_LSH 0
+#define CTRL_DVR_WID 1
+#define CTRL_TIMING_LSH 1
+#define CTRL_TIMING_WID 1
+
+#define TIMING1_LSH 0
+#define TIMING1_WID 8
+#define TIMING2_LSH 0
+#define TIMING2_WID 8
+#define TIMING3_LSH 0
+#define TIMING3_WID 8
+#define TIMING4_LSH 0
+#define TIMING4_WID 8
+#define TIMING5_LSH 0
+#define TIMING5_WID 8
+#define TIMING6_LSH 0
+#define TIMING6_WID 8
+#define TIMING7_LSH 0
+#define TIMING7_WID 8
+#define TIMING8_LSH 0
+#define TIMING8_WID 8
+
+struct max17135 {
+ /* chip revision */
+ int rev;
+
+ struct device *dev;
+
+ /* Platform connection */
+ struct i2c_client *i2c_client;
+
+ /* Client devices */
+ struct platform_device *pdev[MAX17135_REG_NUM];
+
+ /* Timings */
+ unsigned int gvee_pwrup;
+ unsigned int vneg_pwrup;
+ unsigned int vpos_pwrup;
+ unsigned int gvdd_pwrup;
+ unsigned int gvdd_pwrdn;
+ unsigned int vpos_pwrdn;
+ unsigned int vneg_pwrdn;
+ unsigned int gvee_pwrdn;
+
+ /* GPIOs */
+ int gpio_pmic_pwrgood;
+ int gpio_pmic_vcom_ctrl;
+ int gpio_pmic_wakeup;
+ int gpio_pmic_intr;
+
+ /* MAX17135 part variables */
+ int pass_num;
+ int vcom_uV;
+
+ /* One-time VCOM setup marker */
+ bool vcom_setup;
+ bool init_done;
+
+ /* powerup/powerdown wait time */
+ int max_wait;
+
+ /* Dynamically determined polarity for PWRGOOD */
+ int pwrgood_polarity;
+};
+
+enum {
+ /* In alphabetical order */
+ MAX17135_DISPLAY, /* virtual master enable */
+ MAX17135_GVDD,
+ MAX17135_GVEE,
+ MAX17135_HVINN,
+ MAX17135_HVINP,
+ MAX17135_VCOM,
+ MAX17135_VNEG,
+ MAX17135_VPOS,
+ MAX17135_NUM_REGULATORS,
+};
+
+/*
+ * Declarations
+ */
+struct regulator_init_data;
+
+struct max17135_platform_data {
+ unsigned int gvee_pwrup;
+ unsigned int vneg_pwrup;
+ unsigned int vpos_pwrup;
+ unsigned int gvdd_pwrup;
+ unsigned int gvdd_pwrdn;
+ unsigned int vpos_pwrdn;
+ unsigned int vneg_pwrdn;
+ unsigned int gvee_pwrdn;
+ int gpio_pmic_pwrgood;
+ int gpio_pmic_vcom_ctrl;
+ int gpio_pmic_wakeup;
+ int gpio_pmic_intr;
+ int pass_num;
+ int vcom_uV;
+ struct regulator_init_data *regulator_init;
+ int (*init)(struct max17135 *);
+};
+
+int max17135_register_regulator(struct max17135 *max17135, int reg,
+ struct regulator_init_data *initdata);
+
+int max17135_reg_read(int reg_num, unsigned int *reg_val);
+int max17135_reg_write(int reg_num, const unsigned int reg_val);
+
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-28 14:29:27 +0000