PMIC: Add ADC Driver for Dialog DA9052
Add DA9052 ADC driver from Dialog.
Modify Kconfig/Makefile for DA9052 ADC driver.
Signed-off-by: Zhou Jingyu <Jingyu.Zhou@freescale.com>
Acked-by: Lily Zhang <r58066@freescale.com>
Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 0b62c3c..8abd62d 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -39,6 +39,16 @@
comment "Native drivers"
+config SENSORS_DA9052
+ tristate "Dialog DA9052 HWMon"
+ depends on PMIC_DIALOG
+ help
+ Say y here to support the ADC found on Dialog Semiconductor DA9052
+ PMIC.
+
+ This driver can also be built as a module. If so, the module
+ will be called da9052-adc.
+
config SENSORS_ABITUGURU
tristate "Abit uGuru (rev 1 & 2)"
depends on X86 && DMI && EXPERIMENTAL
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 3c9ccef..9a41234 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -123,6 +123,7 @@
obj-$(CONFIG_SENSORS_W83L786NG) += w83l786ng.o
obj-$(CONFIG_SENSORS_WM831X) += wm831x-hwmon.o
obj-$(CONFIG_SENSORS_WM8350) += wm8350-hwmon.o
+obj-$(CONFIG_SENSORS_DA9052) += da9052-adc.o
obj-$(CONFIG_PMBUS) += pmbus/
diff --git a/drivers/hwmon/da9052-adc.c b/drivers/hwmon/da9052-adc.c
new file mode 100644
index 0000000..57985c2
--- /dev/null
+++ b/drivers/hwmon/da9052-adc.c
@@ -0,0 +1,644 @@
+/*
+ * da9052-adc.c -- ADC Driver for Dialog DA9052
+ *
+ * Copyright(c) 2009 Dialog Semiconductor Ltd.
+ *
+ * Author: Dialog Semiconductor Ltd <dchen@diasemi.com>
+ *
+ * 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.
+ *
+ */
+#include <linux/platform_device.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/hwmon.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/mfd/da9052/da9052.h>
+#include <linux/mfd/da9052/reg.h>
+#include <linux/mfd/da9052/adc.h>
+
+#define DRIVER_NAME "da9052-adc"
+
+static const char * const input_names[] = {
+ [DA9052_ADC_VDDOUT] = "VDDOUT",
+ [DA9052_ADC_ICH] = "CHARGING CURRENT",
+ [DA9052_ADC_TBAT] = "BATTERY TEMP",
+ [DA9052_ADC_VBAT] = "BATTERY VOLTAGE",
+ [DA9052_ADC_ADCIN4] = "ADC INPUT 4",
+ [DA9052_ADC_ADCIN5] = "ADC INPUT 5",
+ [DA9052_ADC_ADCIN6] = "ADC INPUT 6",
+ [DA9052_ADC_TSI] = "TSI",
+ [DA9052_ADC_TJUNC] = "BATTERY JUNCTION TEMP",
+ [DA9052_ADC_VBBAT] = "BACK-UP BATTERY TEMP",
+};
+
+
+int da9052_manual_read(struct da9052 *da9052,
+ unsigned char channel)
+{
+ unsigned char man_timeout_cnt = DA9052_ADC_MAX_MANCONV_RETRY_COUNT;
+ struct da9052_ssc_msg msg;
+ unsigned short calc_data;
+ unsigned int ret;
+ u16 data = 0;
+
+ msg.addr = DA9052_ADCMAN_REG;
+ msg.data = channel;
+ msg.data = (msg.data | DA9052_ADCMAN_MANCONV);
+
+ mutex_lock(&da9052->manconv_lock);
+ da9052_lock(da9052);
+
+ ret = da9052->write(da9052, &msg);
+ if (ret)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+
+ /* Wait for the event */
+ do {
+ msg.addr = DA9052_ADCCONT_REG;
+ msg.data = 0;
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+
+ if (DA9052_ADCCONT_ADCMODE & msg.data)
+ msleep(1);
+ else
+ msleep(10);
+
+ msg.addr = DA9052_ADCMAN_REG;
+ msg.data = 0;
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+
+ /* Counter to avoid endless while loop */
+ man_timeout_cnt--;
+ if (man_timeout_cnt == 1) {
+ if (!(msg.data & DA9052_ADCMAN_MANCONV))
+ break;
+ else
+ goto err_ssc_comm;
+ }
+ /* Wait until the MAN_CONV bit is cleared to zero */
+ } while (msg.data & DA9052_ADCMAN_MANCONV);
+
+ msg.addr = DA9052_ADCRESH_REG;
+ msg.data = 0;
+
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+
+ calc_data = (unsigned short)msg.data;
+ data = (calc_data << 2);
+
+ msg.addr = DA9052_ADCRESL_REG;
+ msg.data = 0;
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+
+ /* Clear first 14 bits before ORing */
+ calc_data = (unsigned short)msg.data & 0x0003;
+ data |= calc_data;
+
+ mutex_unlock(&da9052->manconv_lock);
+
+ return data;
+err_ssc_comm:
+ mutex_unlock(&da9052->manconv_lock);
+ da9052_unlock(da9052);
+ return -EIO;
+}
+EXPORT_SYMBOL(da9052_manual_read);
+
+int da9052_read_tjunc(struct da9052 *da9052, char *buf)
+{
+ struct da9052_ssc_msg msg;
+ unsigned char temp;
+ int ret;
+
+ msg.addr = DA9052_TJUNCRES_REG;
+ msg.data = 0;
+
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret)
+ goto err_ssc_comm;
+
+ temp = msg.data;
+
+ msg.addr = DA9052_TOFFSET_REG;
+ msg.data = 0;
+ ret = da9052->read(da9052, &msg);
+ if (ret)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+ /* Calculate Junction temperature */
+ temp = (temp - msg.data);
+ *buf = temp;
+ return 0;
+err_ssc_comm:
+ da9052_unlock(da9052);
+ return -EIO;
+}
+EXPORT_SYMBOL(da9052_read_tjunc);
+
+int da9052_read_tbat_ich(struct da9052 *da9052, char *data, int channel_no)
+{
+ struct da9052_ssc_msg msg;
+ int ret;
+
+ /* Read TBAT conversion result */
+ switch (channel_no) {
+ case DA9052_ADC_TBAT:
+ msg.addr = DA9052_TBATRES_REG;
+ break;
+ case DA9052_ADC_ICH:
+ msg.addr = DA9052_ICHGAV_REG;
+ break;
+ default:
+ return -EINVAL;
+ }
+ msg.data = 0;
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+ *data = msg.data;
+ printk(KERN_INFO"msg.data 1= %d\n", msg.data);
+ msg.data = 28;
+ da9052_lock(da9052);
+ ret = da9052->write(da9052, &msg);
+ if (ret)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+ printk(KERN_INFO"msg.data2 = %d\n", msg.data);
+ msg.data = 0;
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+ printk(KERN_INFO"msg.data3 = %d\n", msg.data);
+ return 0;
+
+err_ssc_comm:
+ da9052_unlock(da9052);
+ return ret;
+}
+EXPORT_SYMBOL(da9052_read_tbat_ich);
+
+static int da9052_start_adc(struct da9052 *da9052, unsigned channel)
+{
+ struct da9052_ssc_msg msg;
+ int ret;
+
+ msg.addr = DA9052_ADCCONT_REG;
+ msg.data = 0;
+
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret != 0)
+ goto err_ssc_comm;
+
+ if (channel == DA9052_ADC_VDDOUT)
+ msg.data = (msg.data | DA9052_ADCCONT_AUTOVDDEN);
+ else if (channel == DA9052_ADC_ADCIN4)
+ msg.data = (msg.data | DA9052_ADCCONT_AUTOAD4EN);
+ else if (channel == DA9052_ADC_ADCIN5)
+ msg.data = (msg.data | DA9052_ADCCONT_AUTOAD5EN);
+ else if (channel == DA9052_ADC_ADCIN6)
+ msg.data = (msg.data | DA9052_ADCCONT_AUTOAD6EN);
+ else
+ return -EINVAL;
+
+ ret = da9052->write(da9052, &msg);
+ if (ret != 0)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+ return 0;
+
+err_ssc_comm:
+ da9052_unlock(da9052);
+ return -EIO;
+}
+
+static int da9052_stop_adc(struct da9052 *da9052, unsigned channel)
+{
+ int ret;
+ struct da9052_ssc_msg msg;
+
+ msg.addr = DA9052_ADCCONT_REG;
+ msg.data = 0;
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret != 0)
+ goto err_ssc_comm;
+
+ if (channel == DA9052_ADC_VDDOUT)
+ msg.data = (msg.data & ~(DA9052_ADCCONT_AUTOVDDEN));
+ else if (channel == DA9052_ADC_ADCIN4)
+ msg.data = (msg.data & ~(DA9052_ADCCONT_AUTOAD4EN));
+ else if (channel == DA9052_ADC_ADCIN5)
+ msg.data = (msg.data & ~(DA9052_ADCCONT_AUTOAD5EN));
+ else if (channel == DA9052_ADC_ADCIN6)
+ msg.data = (msg.data & ~(DA9052_ADCCONT_AUTOAD6EN));
+ else
+ return -EINVAL;
+
+ ret = da9052->write(da9052, &msg);
+ if (ret != 0)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+
+ return 0;
+err_ssc_comm:
+ da9052_unlock(da9052);
+ return -EIO;
+}
+
+static ssize_t da9052_adc_read_start_stop(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct da9052_adc_priv *priv = platform_get_drvdata(pdev);
+ struct da9052_ssc_msg msg;
+ int channel = to_sensor_dev_attr(devattr)->index;
+ int ret;
+
+ ret = da9052_start_adc(priv->da9052, channel);
+ if (ret < 0)
+ return ret;
+
+ /* Read the ADC converted value */
+ switch (channel) {
+ case DA9052_ADC_VDDOUT:
+ msg.addr = DA9052_VDDRES_REG;
+ break;
+#if (DA9052_ADC_CONF_ADC4 == 1)
+ case DA9052_ADC_ADCIN4:
+ msg.addr = DA9052_ADCIN4RES_REG;
+ break;
+#endif
+#if (DA9052_ADC_CONF_ADC5 == 1)
+ case DA9052_ADC_ADCIN5:
+ msg.addr = DA9052_ADCIN5RES_REG;
+ break;
+#endif
+#if (DA9052_ADC_CONF_ADC6 == 1)
+ case DA9052_ADC_ADCIN6:
+ msg.addr = DA9052_ADCIN6RES_REG;
+ break;
+#endif
+ default:
+ return -EINVAL;
+ }
+ msg.data = 0;
+ da9052_lock(priv->da9052);
+ ret = priv->da9052->read(priv->da9052, &msg);
+ if (ret != 0)
+ goto err_ssc_comm;
+ da9052_unlock(priv->da9052);
+
+ ret = da9052_stop_adc(priv->da9052, channel);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%u\n", msg.data);
+
+err_ssc_comm:
+ da9052_unlock(priv->da9052);
+ return ret;
+}
+
+static ssize_t da9052_adc_read_ich(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct da9052_adc_priv *priv = platform_get_drvdata(pdev);
+ int ret;
+
+ ret = da9052_read_tbat_ich(priv->da9052, buf, DA9052_ADC_ICH);
+ if (ret < 0)
+ return ret;
+ return sprintf(buf, "%u\n", *buf);
+}
+
+static ssize_t da9052_adc_read_tbat(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct da9052_adc_priv *priv = platform_get_drvdata(pdev);
+ int ret;
+
+ ret = da9052_read_tbat_ich(priv->da9052, buf, DA9052_ADC_TBAT);
+ if (ret < 0)
+ return ret;
+ return sprintf(buf, "%u\n", *buf);
+}
+
+static ssize_t da9052_adc_read_vbat(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct da9052_adc_priv *priv = platform_get_drvdata(pdev);
+ s32 ret;
+
+ ret = da9052_manual_read(priv->da9052, DA9052_ADC_VBAT);
+ if (ret < 0)
+ return ret;
+ return sprintf(buf, "%u\n", ret);
+}
+
+static ssize_t da9052_adc_read_tjunc(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct da9052_adc_priv *priv = platform_get_drvdata(pdev);
+ int ret;
+ ret = da9052_read_tjunc(priv->da9052, buf);
+ if (ret < 0)
+ return ret;
+ return sprintf(buf, "%u\n", *buf);
+}
+
+static ssize_t da9052_adc_read_vbbat(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct da9052_adc_priv *priv = platform_get_drvdata(pdev);
+ s32 ret;
+
+ ret = da9052_manual_read(priv->da9052, DA9052_ADC_VBBAT);
+ if (ret < 0)
+ return ret;
+ return sprintf(buf, "%u\n", ret);
+}
+
+static int da9052_adc_hw_init(struct da9052 *da9052)
+{
+ struct da9052_ssc_msg msg;
+ int ret;
+
+ /* ADC channel 4 and 5 are by default enabled */
+#if (DA9052_ADC_CONF_ADC4 == 1)
+ msg.addr = DA9052_GPIO0001_REG;
+ msg.data = 0;
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret)
+ goto err_ssc_comm;
+
+ msg.data = (msg.data & ~(DA9052_GPIO0001_GPIO0PIN));
+ ret = da9052->write(da9052, &msg);
+ if (ret != 0)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+#endif
+
+#if (DA9052_ADC_CONF_ADC5 == 1)
+ msg.addr = DA9052_GPIO0001_REG;
+ msg.data = 0;
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret)
+ goto err_ssc_comm;
+
+ msg.data = (msg.data & ~(DA9052_GPIO0001_GPIO0PIN));
+ ret = da9052->write(da9052, &msg);
+ if (ret != 0)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+#endif
+
+#if (DA9052_ADC_CONF_ADC6 == 1)
+ msg.addr = DA9052_GPIO0203_REG;
+ msg.data = 0;
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret)
+ goto err_ssc_comm;
+
+ msg.data = (msg.data & ~(DA9052_GPIO0203_GPIO2PIN));
+ ret = da9052->write(da9052, &msg);
+ if (ret != 0)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+#endif
+#if 0
+ /* By default configure the Measurement sequence interval to 10ms */
+ msg.addr = DA9052_ADCCONT_REG;
+ msg.data = 0;
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret != 0)
+ goto err_ssc_comm;
+
+ /* Set the ADC MODE bit for 10msec sampling timer */
+ msg.data = (msg.data & ~(DA9052_ADCCONT_ADCMODE));
+ ret = da9052->write(da9052, &msg);
+ if (ret != 0)
+ goto err_ssc_comm;
+ da9052_unlock(da9052);
+#endif
+ return 0;
+err_ssc_comm:
+ da9052_unlock(da9052);
+ return -EIO;
+}
+
+static ssize_t da9052_adc_show_name(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ return sprintf(buf, "da9052-adc\n");
+}
+
+static ssize_t show_label(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int channel = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%s\n", input_names[channel]);
+}
+#define DA9052_ADC_CHANNELS(id, name) \
+ static SENSOR_DEVICE_ATTR(in##id##_label, S_IRUGO, show_label, \
+ NULL, name)
+
+DA9052_ADC_CHANNELS(0, DA9052_ADC_VDDOUT);
+DA9052_ADC_CHANNELS(1, DA9052_ADC_ICH);
+DA9052_ADC_CHANNELS(2, DA9052_ADC_TBAT);
+DA9052_ADC_CHANNELS(3, DA9052_ADC_VBAT);
+#if (DA9052_ADC_CONF_ADC4 == 1)
+DA9052_ADC_CHANNELS(4, DA9052_ADC_ADCIN4);
+#endif
+#if (DA9052_ADC_CONF_ADC5 == 1)
+DA9052_ADC_CHANNELS(5, DA9052_ADC_ADCIN5);
+#endif
+#if (DA9052_ADC_CONF_ADC6 == 1)
+DA9052_ADC_CHANNELS(6, DA9052_ADC_ADCIN6);
+#endif
+DA9052_ADC_CHANNELS(7, DA9052_ADC_TSI);
+DA9052_ADC_CHANNELS(8, DA9052_ADC_TJUNC);
+DA9052_ADC_CHANNELS(9, DA9052_ADC_VBBAT);
+
+
+static DEVICE_ATTR(name, S_IRUGO, da9052_adc_show_name, NULL);
+static SENSOR_DEVICE_ATTR(read_vddout, S_IRUGO,
+ da9052_adc_read_start_stop, NULL,
+ DA9052_ADC_VDDOUT);
+static SENSOR_DEVICE_ATTR(read_ich, S_IRUGO, da9052_adc_read_ich, NULL,
+ DA9052_ADC_ICH);
+static SENSOR_DEVICE_ATTR(read_tbat, S_IRUGO, da9052_adc_read_tbat, NULL,
+ DA9052_ADC_TBAT);
+static SENSOR_DEVICE_ATTR(read_vbat, S_IRUGO, da9052_adc_read_vbat, NULL,
+ DA9052_ADC_VBAT);
+#if (DA9052_ADC_CONF_ADC4 == 1)
+static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, da9052_adc_read_start_stop, NULL,
+ DA9052_ADC_ADCIN4);
+#endif
+#if (DA9052_ADC_CONF_ADC5 == 1)
+static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, da9052_adc_read_start_stop, NULL,
+ DA9052_ADC_ADCIN5);
+#endif
+#if (DA9052_ADC_CONF_ADC6 == 1)
+static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, da9052_adc_read_start_stop, NULL,
+ DA9052_ADC_ADCIN6);
+#endif
+static SENSOR_DEVICE_ATTR(read_tjunc, S_IRUGO, da9052_adc_read_tjunc, NULL,
+ DA9052_ADC_TJUNC);
+static SENSOR_DEVICE_ATTR(read_vbbat, S_IRUGO, da9052_adc_read_vbbat, NULL,
+ DA9052_ADC_VBBAT);
+
+static struct attribute *da9052_attr[] = {
+ &dev_attr_name.attr,
+ &sensor_dev_attr_read_vddout.dev_attr.attr,
+ &sensor_dev_attr_in0_label.dev_attr.attr,
+ &sensor_dev_attr_read_ich.dev_attr.attr,
+ &sensor_dev_attr_in1_label.dev_attr.attr,
+ &sensor_dev_attr_read_tbat.dev_attr.attr,
+ &sensor_dev_attr_in2_label.dev_attr.attr,
+ &sensor_dev_attr_read_vbat.dev_attr.attr,
+ &sensor_dev_attr_in3_label.dev_attr.attr,
+#if (DA9052_ADC_CONF_ADC4 == 1)
+ &sensor_dev_attr_in4_input.dev_attr.attr,
+ &sensor_dev_attr_in4_label.dev_attr.attr,
+#endif
+#if (DA9052_ADC_CONF_ADC5 == 1)
+ &sensor_dev_attr_in5_input.dev_attr.attr,
+ &sensor_dev_attr_in5_label.dev_attr.attr,
+#endif
+#if (DA9052_ADC_CONF_ADC6 == 1)
+ &sensor_dev_attr_in6_input.dev_attr.attr,
+ &sensor_dev_attr_in6_label.dev_attr.attr,
+#endif
+ &sensor_dev_attr_in7_label.dev_attr.attr,
+ &sensor_dev_attr_read_tjunc.dev_attr.attr,
+ &sensor_dev_attr_in8_label.dev_attr.attr,
+ &sensor_dev_attr_read_vbbat.dev_attr.attr,
+ &sensor_dev_attr_in9_label.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group da9052_group = {
+ .attrs = da9052_attr,
+};
+
+static int __init da9052_adc_probe(struct platform_device *pdev)
+{
+ struct da9052_adc_priv *priv;
+ int ret;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->da9052 = dev_get_drvdata(pdev->dev.parent);
+
+ platform_set_drvdata(pdev, priv);
+
+ /* Register sysfs hooks */
+ ret = sysfs_create_group(&pdev->dev.kobj, &da9052_group);
+ if (ret)
+ goto out_err_create1;
+
+ priv->hwmon_dev = hwmon_device_register(&pdev->dev);
+ if (IS_ERR(priv->hwmon_dev)) {
+ ret = PTR_ERR(priv->hwmon_dev);
+ goto out_err_create2;
+ }
+ /* Initializes the hardware for ADC module */
+ da9052_adc_hw_init(priv->da9052);
+
+ /* Initialize mutex required for ADC Manual read */
+ mutex_init(&priv->da9052->manconv_lock);
+
+ return 0;
+
+out_err_create2:
+ sysfs_remove_group(&pdev->dev.kobj, &da9052_group);
+out_err_create1:
+ platform_set_drvdata(pdev, NULL);
+ kfree(priv);
+
+ return ret;
+}
+
+static int __devexit da9052_adc_remove(struct platform_device *pdev)
+{
+ struct da9052_adc_priv *priv = platform_get_drvdata(pdev);
+
+ mutex_destroy(&priv->da9052->manconv_lock);
+
+ hwmon_device_unregister(priv->hwmon_dev);
+
+ sysfs_remove_group(&pdev->dev.kobj, &da9052_group);
+
+ platform_set_drvdata(pdev, NULL);
+ kfree(priv);
+
+ return 0;
+}
+
+static struct platform_driver da9052_adc_driver = {
+ .remove = __devexit_p(da9052_adc_remove),
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRIVER_NAME,
+ },
+};
+
+static int __init da9052_adc_init(void)
+{
+ return platform_driver_probe(&da9052_adc_driver, da9052_adc_probe);
+}
+module_init(da9052_adc_init);
+
+static void __exit da9052_adc_exit(void)
+{
+ platform_driver_unregister(&da9052_adc_driver);
+}
+module_exit(da9052_adc_exit);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
+MODULE_DESCRIPTION("DA9052 ADC driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);