Orange Pi5 kernel

 // SPDX-License-Identifier: GPL-2.0-only
/*
 * JSA1212 Ambient Light & Proximity Sensor Driver
 *
 * Copyright (c) 2014, Intel Corporation.
 *
 * JSA1212 I2C slave address: 0x44(ADDR tied to GND), 0x45(ADDR tied to VDD)
 *
 * TODO: Interrupt support, thresholds, range support.
 */
 
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/mutex.h>
#include <linux/acpi.h>
#include <linux/regmap.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
 
/* JSA1212 reg address */
#define JSA1212_CONF_REG		0x01
#define JSA1212_INT_REG			0x02
#define JSA1212_PXS_LT_REG		0x03
#define JSA1212_PXS_HT_REG		0x04
#define JSA1212_ALS_TH1_REG		0x05
#define JSA1212_ALS_TH2_REG		0x06
#define JSA1212_ALS_TH3_REG		0x07
#define JSA1212_PXS_DATA_REG		0x08
#define JSA1212_ALS_DT1_REG		0x09
#define JSA1212_ALS_DT2_REG		0x0A
#define JSA1212_ALS_RNG_REG		0x0B
#define JSA1212_MAX_REG			0x0C
 
/* JSA1212 reg masks */
#define JSA1212_CONF_MASK		0xFF
#define JSA1212_INT_MASK		0xFF
#define JSA1212_PXS_LT_MASK		0xFF
#define JSA1212_PXS_HT_MASK		0xFF
#define JSA1212_ALS_TH1_MASK		0xFF
#define JSA1212_ALS_TH2_LT_MASK		0x0F
#define JSA1212_ALS_TH2_HT_MASK		0xF0
#define JSA1212_ALS_TH3_MASK		0xFF
#define JSA1212_PXS_DATA_MASK		0xFF
#define JSA1212_ALS_DATA_MASK		0x0FFF
#define JSA1212_ALS_DT1_MASK		0xFF
#define JSA1212_ALS_DT2_MASK		0x0F
#define JSA1212_ALS_RNG_MASK		0x07
 
/* JSA1212 CONF REG bits */
#define JSA1212_CONF_PXS_MASK		0x80
#define JSA1212_CONF_PXS_ENABLE		0x80
#define JSA1212_CONF_PXS_DISABLE	0x00
#define JSA1212_CONF_ALS_MASK		0x04
#define JSA1212_CONF_ALS_ENABLE		0x04
#define JSA1212_CONF_ALS_DISABLE	0x00
#define JSA1212_CONF_IRDR_MASK		0x08
/* Proxmity sensing IRDR current sink settings */
#define JSA1212_CONF_IRDR_200MA		0x08
#define JSA1212_CONF_IRDR_100MA		0x00
#define JSA1212_CONF_PXS_SLP_MASK	0x70
#define JSA1212_CONF_PXS_SLP_0MS	0x70
#define JSA1212_CONF_PXS_SLP_12MS	0x60
#define JSA1212_CONF_PXS_SLP_50MS	0x50
#define JSA1212_CONF_PXS_SLP_75MS	0x40
#define JSA1212_CONF_PXS_SLP_100MS	0x30
#define JSA1212_CONF_PXS_SLP_200MS	0x20
#define JSA1212_CONF_PXS_SLP_400MS	0x10
#define JSA1212_CONF_PXS_SLP_800MS	0x00
 
/* JSA1212 INT REG bits */
#define JSA1212_INT_CTRL_MASK		0x01
#define JSA1212_INT_CTRL_EITHER		0x00
#define JSA1212_INT_CTRL_BOTH		0x01
#define JSA1212_INT_ALS_PRST_MASK	0x06
#define JSA1212_INT_ALS_PRST_1CONV	0x00
#define JSA1212_INT_ALS_PRST_4CONV	0x02
#define JSA1212_INT_ALS_PRST_8CONV	0x04
#define JSA1212_INT_ALS_PRST_16CONV	0x06
#define JSA1212_INT_ALS_FLAG_MASK	0x08
#define JSA1212_INT_ALS_FLAG_CLR	0x00
#define JSA1212_INT_PXS_PRST_MASK	0x60
#define JSA1212_INT_PXS_PRST_1CONV	0x00
#define JSA1212_INT_PXS_PRST_4CONV	0x20
#define JSA1212_INT_PXS_PRST_8CONV	0x40
#define JSA1212_INT_PXS_PRST_16CONV	0x60
#define JSA1212_INT_PXS_FLAG_MASK	0x80
#define JSA1212_INT_PXS_FLAG_CLR	0x00
 
/* JSA1212 ALS RNG REG bits */
#define JSA1212_ALS_RNG_0_2048		0x00
#define JSA1212_ALS_RNG_0_1024		0x01
#define JSA1212_ALS_RNG_0_512		0x02
#define JSA1212_ALS_RNG_0_256		0x03
#define JSA1212_ALS_RNG_0_128		0x04
 
/* JSA1212 INT threshold range */
#define JSA1212_ALS_TH_MIN	0x0000
#define JSA1212_ALS_TH_MAX	0x0FFF
#define JSA1212_PXS_TH_MIN	0x00
#define JSA1212_PXS_TH_MAX	0xFF
 
#define JSA1212_ALS_DELAY_MS	200
#define JSA1212_PXS_DELAY_MS	100
 
#define JSA1212_DRIVER_NAME	"jsa1212"
#define JSA1212_REGMAP_NAME	"jsa1212_regmap"
 
enum jsa1212_op_mode {
<------>JSA1212_OPMODE_ALS_EN,
<------>JSA1212_OPMODE_PXS_EN,
};
 
struct jsa1212_data {
<------>struct i2c_client *client;
<------>struct mutex lock;
<------>u8 als_rng_idx;
<------>bool als_en; /* ALS enable status */
<------>bool pxs_en; /* proximity enable status */
<------>struct regmap *regmap;
};
 
/* ALS range idx to val mapping */
static const int jsa1212_als_range_val[] = {2048, 1024, 512, 256, 128,
<------><------><------><------><------><------>128, 128, 128};
 
/* Enables or disables ALS function based on status */
static int jsa1212_als_enable(struct jsa1212_data *data, u8 status)
{
<------>int ret;
 
<------>ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
<------><------><------><------>JSA1212_CONF_ALS_MASK,
<------><------><------><------>status);
<------>if (ret < 0)
<------><------>return ret;
 
<------>data->als_en = !!status;
 
<------>return 0;
}
 
/* Enables or disables PXS function based on status */
static int jsa1212_pxs_enable(struct jsa1212_data *data, u8 status)
{
<------>int ret;
 
<------>ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
<------><------><------><------>JSA1212_CONF_PXS_MASK,
<------><------><------><------>status);
<------>if (ret < 0)
<------><------>return ret;
 
<------>data->pxs_en = !!status;
 
<------>return 0;
}
 
static int jsa1212_read_als_data(struct jsa1212_data *data,
<------><------><------><------>unsigned int *val)
{
<------>int ret;
<------>__le16 als_data;
 
<------>ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE);
<------>if (ret < 0)
<------><------>return ret;
 
<------>/* Delay for data output */
<------>msleep(JSA1212_ALS_DELAY_MS);
 
<------>/* Read 12 bit data */
<------>ret = regmap_bulk_read(data->regmap, JSA1212_ALS_DT1_REG, &als_data, 2);
<------>if (ret < 0) {
<------><------>dev_err(&data->client->dev, "als data read err\n");
<------><------>goto als_data_read_err;
<------>}
 
<------>*val = le16_to_cpu(als_data);
 
als_data_read_err:
<------>return jsa1212_als_enable(data, JSA1212_CONF_ALS_DISABLE);
}
 
static int jsa1212_read_pxs_data(struct jsa1212_data *data,
<------><------><------><------>unsigned int *val)
{
<------>int ret;
<------>unsigned int pxs_data;
 
<------>ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE);
<------>if (ret < 0)
<------><------>return ret;
 
<------>/* Delay for data output */
<------>msleep(JSA1212_PXS_DELAY_MS);
 
<------>/* Read out all data */
<------>ret = regmap_read(data->regmap, JSA1212_PXS_DATA_REG, &pxs_data);
<------>if (ret < 0) {
<------><------>dev_err(&data->client->dev, "pxs data read err\n");
<------><------>goto pxs_data_read_err;
<------>}
 
<------>*val = pxs_data & JSA1212_PXS_DATA_MASK;
 
pxs_data_read_err:
<------>return jsa1212_pxs_enable(data, JSA1212_CONF_PXS_DISABLE);
}
 
static int jsa1212_read_raw(struct iio_dev *indio_dev,
<------><------><------><------>struct iio_chan_spec const *chan,
<------><------><------><------>int *val, int *val2, long mask)
{
<------>int ret;
<------>struct jsa1212_data *data = iio_priv(indio_dev);
 
<------>switch (mask) {
<------>case IIO_CHAN_INFO_RAW:
<------><------>mutex_lock(&data->lock);
<------><------>switch (chan->type) {
<------><------>case IIO_LIGHT:
<------><------><------>ret = jsa1212_read_als_data(data, val);
<------><------><------>break;
<------><------>case IIO_PROXIMITY:
<------><------><------>ret = jsa1212_read_pxs_data(data, val);
<------><------><------>break;
<------><------>default:
<------><------><------>ret = -EINVAL;
<------><------><------>break;
<------><------>}
<------><------>mutex_unlock(&data->lock);
<------><------>return ret < 0 ? ret : IIO_VAL_INT;
<------>case IIO_CHAN_INFO_SCALE:
<------><------>switch (chan->type) {
<------><------>case IIO_LIGHT:
<------><------><------>*val = jsa1212_als_range_val[data->als_rng_idx];
<------><------><------>*val2 = BIT(12); /* Max 12 bit value */
<------><------><------>return IIO_VAL_FRACTIONAL;
<------><------>default:
<------><------><------>break;
<------><------>}
<------><------>break;
<------>default:
<------><------>break;
<------>}
 
<------>return -EINVAL;
}
 
static const struct iio_chan_spec jsa1212_channels[] = {
<------>{
<------><------>.type = IIO_LIGHT,
<------><------>.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
<------><------><------>BIT(IIO_CHAN_INFO_SCALE),
<------>},
<------>{
<------><------>.type = IIO_PROXIMITY,
<------><------>.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
<------>}
};
 
static const struct iio_info jsa1212_info = {
<------>.read_raw		= &jsa1212_read_raw,
};
 
static int jsa1212_chip_init(struct jsa1212_data *data)
{
<------>int ret;
 
<------>ret = regmap_write(data->regmap, JSA1212_CONF_REG,
<------><------><------><------>(JSA1212_CONF_PXS_SLP_50MS |
<------><------><------><------>JSA1212_CONF_IRDR_200MA));
<------>if (ret < 0)
<------><------>return ret;
 
<------>ret = regmap_write(data->regmap, JSA1212_INT_REG,
<------><------><------><------>JSA1212_INT_ALS_PRST_4CONV);
<------>if (ret < 0)
<------><------>return ret;
 
<------>data->als_rng_idx = JSA1212_ALS_RNG_0_2048;
 
<------>return 0;
}
 
static bool jsa1212_is_volatile_reg(struct device *dev, unsigned int reg)
{
<------>switch (reg) {
<------>case JSA1212_PXS_DATA_REG:
<------>case JSA1212_ALS_DT1_REG:
<------>case JSA1212_ALS_DT2_REG:
<------>case JSA1212_INT_REG:
<------><------>return true;
<------>default:
<------><------>return false;
<------>}
}
 
static const struct regmap_config jsa1212_regmap_config = {
<------>.name =  JSA1212_REGMAP_NAME,
<------>.reg_bits = 8,
<------>.val_bits = 8,
<------>.max_register = JSA1212_MAX_REG,
<------>.cache_type = REGCACHE_RBTREE,
<------>.volatile_reg = jsa1212_is_volatile_reg,
};
 
static int jsa1212_probe(struct i2c_client *client,
<------><------><------> const struct i2c_device_id *id)
{
<------>struct jsa1212_data *data;
<------>struct iio_dev *indio_dev;
<------>struct regmap *regmap;
<------>int ret;
 
<------>indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
<------>if (!indio_dev)
<------><------>return -ENOMEM;
 
<------>regmap = devm_regmap_init_i2c(client, &jsa1212_regmap_config);
<------>if (IS_ERR(regmap)) {
<------><------>dev_err(&client->dev, "Regmap initialization failed.\n");
<------><------>return PTR_ERR(regmap);
<------>}
 
<------>data = iio_priv(indio_dev);
 
<------>i2c_set_clientdata(client, indio_dev);
<------>data->client = client;
<------>data->regmap = regmap;
 
<------>mutex_init(&data->lock);
 
<------>ret = jsa1212_chip_init(data);
<------>if (ret < 0)
<------><------>return ret;
 
<------>indio_dev->channels = jsa1212_channels;
<------>indio_dev->num_channels = ARRAY_SIZE(jsa1212_channels);
<------>indio_dev->name = JSA1212_DRIVER_NAME;
<------>indio_dev->modes = INDIO_DIRECT_MODE;
 
<------>indio_dev->info = &jsa1212_info;
 
<------>ret = iio_device_register(indio_dev);
<------>if (ret < 0)
<------><------>dev_err(&client->dev, "%s: register device failed\n", __func__);
 
<------>return ret;
}
 
 /* power off the device */
static int jsa1212_power_off(struct jsa1212_data *data)
{
<------>int ret;
 
<------>mutex_lock(&data->lock);
 
<------>ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
<------><------><------><------>JSA1212_CONF_ALS_MASK |
<------><------><------><------>JSA1212_CONF_PXS_MASK,
<------><------><------><------>JSA1212_CONF_ALS_DISABLE |
<------><------><------><------>JSA1212_CONF_PXS_DISABLE);
 
<------>if (ret < 0)
<------><------>dev_err(&data->client->dev, "power off cmd failed\n");
 
<------>mutex_unlock(&data->lock);
 
<------>return ret;
}
 
static int jsa1212_remove(struct i2c_client *client)
{
<------>struct iio_dev *indio_dev = i2c_get_clientdata(client);
<------>struct jsa1212_data *data = iio_priv(indio_dev);
 
<------>iio_device_unregister(indio_dev);
 
<------>return jsa1212_power_off(data);
}
 
#ifdef CONFIG_PM_SLEEP
static int jsa1212_suspend(struct device *dev)
{
<------>struct jsa1212_data *data;
 
<------>data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
 
<------>return jsa1212_power_off(data);
}
 
static int jsa1212_resume(struct device *dev)
{
<------>int ret = 0;
<------>struct jsa1212_data *data;
 
<------>data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
 
<------>mutex_lock(&data->lock);
 
<------>if (data->als_en) {
<------><------>ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE);
<------><------>if (ret < 0) {
<------><------><------>dev_err(dev, "als resume failed\n");
<------><------><------>goto unlock_and_ret;
<------><------>}
<------>}
 
<------>if (data->pxs_en) {
<------><------>ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE);
<------><------>if (ret < 0)
<------><------><------>dev_err(dev, "pxs resume failed\n");
<------>}
 
unlock_and_ret:
<------>mutex_unlock(&data->lock);
<------>return ret;
}
 
static SIMPLE_DEV_PM_OPS(jsa1212_pm_ops, jsa1212_suspend, jsa1212_resume);
 
#define JSA1212_PM_OPS (&jsa1212_pm_ops)
#else
#define JSA1212_PM_OPS NULL
#endif
 
static const struct acpi_device_id jsa1212_acpi_match[] = {
<------>{"JSA1212", 0},
<------>{ },
};
MODULE_DEVICE_TABLE(acpi, jsa1212_acpi_match);
 
static const struct i2c_device_id jsa1212_id[] = {
<------>{ JSA1212_DRIVER_NAME, 0 },
<------>{ }
};
MODULE_DEVICE_TABLE(i2c, jsa1212_id);
 
static struct i2c_driver jsa1212_driver = {
<------>.driver = {
<------><------>.name	= JSA1212_DRIVER_NAME,
<------><------>.pm	= JSA1212_PM_OPS,
<------><------>.acpi_match_table = ACPI_PTR(jsa1212_acpi_match),
<------>},
<------>.probe		= jsa1212_probe,
<------>.remove		= jsa1212_remove,
<------>.id_table	= jsa1212_id,
};
module_i2c_driver(jsa1212_driver);
 
MODULE_AUTHOR("Sathya Kuppuswamy <sathyanarayanan.kuppuswamy@linux.intel.com>");
MODULE_DESCRIPTION("JSA1212 proximity/ambient light sensor driver");
MODULE_LICENSE("GPL v2");

	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* JSA1212 Ambient Light & Proximity Sensor Driver
	*
	* Copyright (c) 2014, Intel Corporation.
	*
	* JSA1212 I2C slave address: 0x44(ADDR tied to GND), 0x45(ADDR tied to VDD)
	*
	* TODO: Interrupt support, thresholds, range support.
	*/

	#include <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/module.h>
	#include <linux/delay.h>
	#include <linux/i2c.h>
	#include <linux/mutex.h>
	#include <linux/acpi.h>
	#include <linux/regmap.h>
	#include <linux/iio/iio.h>
	#include <linux/iio/sysfs.h>

	/* JSA1212 reg address */
	#define JSA1212_CONF_REG 0x01
	#define JSA1212_INT_REG 0x02
	#define JSA1212_PXS_LT_REG 0x03
	#define JSA1212_PXS_HT_REG 0x04
	#define JSA1212_ALS_TH1_REG 0x05
	#define JSA1212_ALS_TH2_REG 0x06
	#define JSA1212_ALS_TH3_REG 0x07
	#define JSA1212_PXS_DATA_REG 0x08
	#define JSA1212_ALS_DT1_REG 0x09
	#define JSA1212_ALS_DT2_REG 0x0A
	#define JSA1212_ALS_RNG_REG 0x0B
	#define JSA1212_MAX_REG 0x0C

	/* JSA1212 reg masks */
	#define JSA1212_CONF_MASK 0xFF
	#define JSA1212_INT_MASK 0xFF
	#define JSA1212_PXS_LT_MASK 0xFF
	#define JSA1212_PXS_HT_MASK 0xFF
	#define JSA1212_ALS_TH1_MASK 0xFF
	#define JSA1212_ALS_TH2_LT_MASK 0x0F
	#define JSA1212_ALS_TH2_HT_MASK 0xF0
	#define JSA1212_ALS_TH3_MASK 0xFF
	#define JSA1212_PXS_DATA_MASK 0xFF
	#define JSA1212_ALS_DATA_MASK 0x0FFF
	#define JSA1212_ALS_DT1_MASK 0xFF
	#define JSA1212_ALS_DT2_MASK 0x0F
	#define JSA1212_ALS_RNG_MASK 0x07

	/* JSA1212 CONF REG bits */
	#define JSA1212_CONF_PXS_MASK 0x80
	#define JSA1212_CONF_PXS_ENABLE 0x80
	#define JSA1212_CONF_PXS_DISABLE 0x00
	#define JSA1212_CONF_ALS_MASK 0x04
	#define JSA1212_CONF_ALS_ENABLE 0x04
	#define JSA1212_CONF_ALS_DISABLE 0x00
	#define JSA1212_CONF_IRDR_MASK 0x08
	/* Proxmity sensing IRDR current sink settings */
	#define JSA1212_CONF_IRDR_200MA 0x08
	#define JSA1212_CONF_IRDR_100MA 0x00
	#define JSA1212_CONF_PXS_SLP_MASK 0x70
	#define JSA1212_CONF_PXS_SLP_0MS 0x70
	#define JSA1212_CONF_PXS_SLP_12MS 0x60
	#define JSA1212_CONF_PXS_SLP_50MS 0x50
	#define JSA1212_CONF_PXS_SLP_75MS 0x40
	#define JSA1212_CONF_PXS_SLP_100MS 0x30
	#define JSA1212_CONF_PXS_SLP_200MS 0x20
	#define JSA1212_CONF_PXS_SLP_400MS 0x10
	#define JSA1212_CONF_PXS_SLP_800MS 0x00

	/* JSA1212 INT REG bits */
	#define JSA1212_INT_CTRL_MASK 0x01
	#define JSA1212_INT_CTRL_EITHER 0x00
	#define JSA1212_INT_CTRL_BOTH 0x01
	#define JSA1212_INT_ALS_PRST_MASK 0x06
	#define JSA1212_INT_ALS_PRST_1CONV 0x00
	#define JSA1212_INT_ALS_PRST_4CONV 0x02
	#define JSA1212_INT_ALS_PRST_8CONV 0x04
	#define JSA1212_INT_ALS_PRST_16CONV 0x06
	#define JSA1212_INT_ALS_FLAG_MASK 0x08
	#define JSA1212_INT_ALS_FLAG_CLR 0x00
	#define JSA1212_INT_PXS_PRST_MASK 0x60
	#define JSA1212_INT_PXS_PRST_1CONV 0x00
	#define JSA1212_INT_PXS_PRST_4CONV 0x20
	#define JSA1212_INT_PXS_PRST_8CONV 0x40
	#define JSA1212_INT_PXS_PRST_16CONV 0x60
	#define JSA1212_INT_PXS_FLAG_MASK 0x80
	#define JSA1212_INT_PXS_FLAG_CLR 0x00

	/* JSA1212 ALS RNG REG bits */
	#define JSA1212_ALS_RNG_0_2048 0x00
	#define JSA1212_ALS_RNG_0_1024 0x01
	#define JSA1212_ALS_RNG_0_512 0x02
	#define JSA1212_ALS_RNG_0_256 0x03
	#define JSA1212_ALS_RNG_0_128 0x04

	/* JSA1212 INT threshold range */
	#define JSA1212_ALS_TH_MIN 0x0000
	#define JSA1212_ALS_TH_MAX 0x0FFF
	#define JSA1212_PXS_TH_MIN 0x00
	#define JSA1212_PXS_TH_MAX 0xFF

	#define JSA1212_ALS_DELAY_MS 200
	#define JSA1212_PXS_DELAY_MS 100

	#define JSA1212_DRIVER_NAME "jsa1212"
	#define JSA1212_REGMAP_NAME "jsa1212_regmap"

	enum jsa1212_op_mode {
	<------>JSA1212_OPMODE_ALS_EN,
	<------>JSA1212_OPMODE_PXS_EN,
	};

	struct jsa1212_data {
	<------>struct i2c_client *client;
	<------>struct mutex lock;
	<------>u8 als_rng_idx;
	<------>bool als_en; /* ALS enable status */
	<------>bool pxs_en; /* proximity enable status */
	<------>struct regmap *regmap;
	};

	/* ALS range idx to val mapping */
	static const int jsa1212_als_range_val[] = {2048, 1024, 512, 256, 128,
	<------><------><------><------><------><------>128, 128, 128};

	/* Enables or disables ALS function based on status */
	static int jsa1212_als_enable(struct jsa1212_data *data, u8 status)
	{
	<------>int ret;

	<------>ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
	<------><------><------><------>JSA1212_CONF_ALS_MASK,
	<------><------><------><------>status);
	<------>if (ret < 0)
	<------><------>return ret;

	<------>data->als_en = !!status;

	<------>return 0;
	}

	/* Enables or disables PXS function based on status */
	static int jsa1212_pxs_enable(struct jsa1212_data *data, u8 status)
	{
	<------>int ret;

	<------>ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
	<------><------><------><------>JSA1212_CONF_PXS_MASK,
	<------><------><------><------>status);
	<------>if (ret < 0)
	<------><------>return ret;

	<------>data->pxs_en = !!status;

	<------>return 0;
	}

	static int jsa1212_read_als_data(struct jsa1212_data *data,
	<------><------><------><------>unsigned int *val)
	{
	<------>int ret;
	<------>__le16 als_data;

	<------>ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE);
	<------>if (ret < 0)
	<------><------>return ret;

	<------>/* Delay for data output */
	<------>msleep(JSA1212_ALS_DELAY_MS);

	<------>/* Read 12 bit data */
	<------>ret = regmap_bulk_read(data->regmap, JSA1212_ALS_DT1_REG, &als_data, 2);
	<------>if (ret < 0) {
	<------><------>dev_err(&data->client->dev, "als data read err\n");
	<------><------>goto als_data_read_err;
	<------>}

	<------>*val = le16_to_cpu(als_data);

	als_data_read_err:
	<------>return jsa1212_als_enable(data, JSA1212_CONF_ALS_DISABLE);
	}

	static int jsa1212_read_pxs_data(struct jsa1212_data *data,
	<------><------><------><------>unsigned int *val)
	{
	<------>int ret;
	<------>unsigned int pxs_data;

	<------>ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE);
	<------>if (ret < 0)
	<------><------>return ret;

	<------>/* Delay for data output */
	<------>msleep(JSA1212_PXS_DELAY_MS);

	<------>/* Read out all data */
	<------>ret = regmap_read(data->regmap, JSA1212_PXS_DATA_REG, &pxs_data);
	<------>if (ret < 0) {
	<------><------>dev_err(&data->client->dev, "pxs data read err\n");
	<------><------>goto pxs_data_read_err;
	<------>}

	<------>*val = pxs_data & JSA1212_PXS_DATA_MASK;

	pxs_data_read_err:
	<------>return jsa1212_pxs_enable(data, JSA1212_CONF_PXS_DISABLE);
	}

	static int jsa1212_read_raw(struct iio_dev *indio_dev,
	<------><------><------><------>struct iio_chan_spec const *chan,
	<------><------><------><------>int val, int val2, long mask)
	{
	<------>int ret;
	<------>struct jsa1212_data *data = iio_priv(indio_dev);

	<------>switch (mask) {
	<------>case IIO_CHAN_INFO_RAW:
	<------><------>mutex_lock(&data->lock);
	<------><------>switch (chan->type) {
	<------><------>case IIO_LIGHT:
	<------><------><------>ret = jsa1212_read_als_data(data, val);
	<------><------><------>break;
	<------><------>case IIO_PROXIMITY:
	<------><------><------>ret = jsa1212_read_pxs_data(data, val);
	<------><------><------>break;
	<------><------>default:
	<------><------><------>ret = -EINVAL;
	<------><------><------>break;
	<------><------>}
	<------><------>mutex_unlock(&data->lock);
	<------><------>return ret < 0 ? ret : IIO_VAL_INT;
	<------>case IIO_CHAN_INFO_SCALE:
	<------><------>switch (chan->type) {
	<------><------>case IIO_LIGHT:
	<------><------><------>*val = jsa1212_als_range_val[data->als_rng_idx];
	<------><------><------>val2 = BIT(12); / Max 12 bit value */
	<------><------><------>return IIO_VAL_FRACTIONAL;
	<------><------>default:
	<------><------><------>break;
	<------><------>}
	<------><------>break;
	<------>default:
	<------><------>break;
	<------>}

	<------>return -EINVAL;
	}

	static const struct iio_chan_spec jsa1212_channels[] = {
	<------>{
	<------><------>.type = IIO_LIGHT,
	<------><------>.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) \|
	<------><------><------>BIT(IIO_CHAN_INFO_SCALE),
	<------>},
	<------>{
	<------><------>.type = IIO_PROXIMITY,
	<------><------>.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
	<------>}
	};

	static const struct iio_info jsa1212_info = {
	<------>.read_raw = &jsa1212_read_raw,
	};

	static int jsa1212_chip_init(struct jsa1212_data *data)
	{
	<------>int ret;

	<------>ret = regmap_write(data->regmap, JSA1212_CONF_REG,
	<------><------><------><------>(JSA1212_CONF_PXS_SLP_50MS \|
	<------><------><------><------>JSA1212_CONF_IRDR_200MA));
	<------>if (ret < 0)
	<------><------>return ret;

	<------>ret = regmap_write(data->regmap, JSA1212_INT_REG,
	<------><------><------><------>JSA1212_INT_ALS_PRST_4CONV);
	<------>if (ret < 0)
	<------><------>return ret;

	<------>data->als_rng_idx = JSA1212_ALS_RNG_0_2048;

	<------>return 0;
	}

	static bool jsa1212_is_volatile_reg(struct device *dev, unsigned int reg)
	{
	<------>switch (reg) {
	<------>case JSA1212_PXS_DATA_REG:
	<------>case JSA1212_ALS_DT1_REG:
	<------>case JSA1212_ALS_DT2_REG:
	<------>case JSA1212_INT_REG:
	<------><------>return true;
	<------>default:
	<------><------>return false;
	<------>}
	}

	static const struct regmap_config jsa1212_regmap_config = {
	<------>.name = JSA1212_REGMAP_NAME,
	<------>.reg_bits = 8,
	<------>.val_bits = 8,
	<------>.max_register = JSA1212_MAX_REG,
	<------>.cache_type = REGCACHE_RBTREE,
	<------>.volatile_reg = jsa1212_is_volatile_reg,
	};

	static int jsa1212_probe(struct i2c_client *client,
	<------><------><------> const struct i2c_device_id *id)
	{
	<------>struct jsa1212_data *data;
	<------>struct iio_dev *indio_dev;
	<------>struct regmap *regmap;
	<------>int ret;

	<------>indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
	<------>if (!indio_dev)
	<------><------>return -ENOMEM;

	<------>regmap = devm_regmap_init_i2c(client, &jsa1212_regmap_config);
	<------>if (IS_ERR(regmap)) {
	<------><------>dev_err(&client->dev, "Regmap initialization failed.\n");
	<------><------>return PTR_ERR(regmap);
	<------>}

	<------>data = iio_priv(indio_dev);

	<------>i2c_set_clientdata(client, indio_dev);
	<------>data->client = client;
	<------>data->regmap = regmap;

	<------>mutex_init(&data->lock);

	<------>ret = jsa1212_chip_init(data);
	<------>if (ret < 0)
	<------><------>return ret;

	<------>indio_dev->channels = jsa1212_channels;
	<------>indio_dev->num_channels = ARRAY_SIZE(jsa1212_channels);
	<------>indio_dev->name = JSA1212_DRIVER_NAME;
	<------>indio_dev->modes = INDIO_DIRECT_MODE;

	<------>indio_dev->info = &jsa1212_info;

	<------>ret = iio_device_register(indio_dev);
	<------>if (ret < 0)
	<------><------>dev_err(&client->dev, "%s: register device failed\n", __func__);

	<------>return ret;
	}

	/* power off the device */
	static int jsa1212_power_off(struct jsa1212_data *data)
	{
	<------>int ret;

	<------>mutex_lock(&data->lock);

	<------>ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
	<------><------><------><------>JSA1212_CONF_ALS_MASK \|
	<------><------><------><------>JSA1212_CONF_PXS_MASK,
	<------><------><------><------>JSA1212_CONF_ALS_DISABLE \|
	<------><------><------><------>JSA1212_CONF_PXS_DISABLE);

	<------>if (ret < 0)
	<------><------>dev_err(&data->client->dev, "power off cmd failed\n");

	<------>mutex_unlock(&data->lock);

	<------>return ret;
	}

	static int jsa1212_remove(struct i2c_client *client)
	{
	<------>struct iio_dev *indio_dev = i2c_get_clientdata(client);
	<------>struct jsa1212_data *data = iio_priv(indio_dev);

	<------>iio_device_unregister(indio_dev);

	<------>return jsa1212_power_off(data);
	}

	#ifdef CONFIG_PM_SLEEP
	static int jsa1212_suspend(struct device *dev)
	{
	<------>struct jsa1212_data *data;

	<------>data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));

	<------>return jsa1212_power_off(data);
	}

	static int jsa1212_resume(struct device *dev)
	{
	<------>int ret = 0;
	<------>struct jsa1212_data *data;

	<------>data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));

	<------>mutex_lock(&data->lock);

	<------>if (data->als_en) {
	<------><------>ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE);
	<------><------>if (ret < 0) {
	<------><------><------>dev_err(dev, "als resume failed\n");
	<------><------><------>goto unlock_and_ret;
	<------><------>}
	<------>}

	<------>if (data->pxs_en) {
	<------><------>ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE);
	<------><------>if (ret < 0)
	<------><------><------>dev_err(dev, "pxs resume failed\n");
	<------>}

	unlock_and_ret:
	<------>mutex_unlock(&data->lock);
	<------>return ret;
	}

	static SIMPLE_DEV_PM_OPS(jsa1212_pm_ops, jsa1212_suspend, jsa1212_resume);

	#define JSA1212_PM_OPS (&jsa1212_pm_ops)
	#else
	#define JSA1212_PM_OPS NULL
	#endif

	static const struct acpi_device_id jsa1212_acpi_match[] = {
	<------>{"JSA1212", 0},
	<------>{ },
	};
	MODULE_DEVICE_TABLE(acpi, jsa1212_acpi_match);

	static const struct i2c_device_id jsa1212_id[] = {
	<------>{ JSA1212_DRIVER_NAME, 0 },
	<------>{ }
	};
	MODULE_DEVICE_TABLE(i2c, jsa1212_id);

	static struct i2c_driver jsa1212_driver = {
	<------>.driver = {
	<------><------>.name = JSA1212_DRIVER_NAME,
	<------><------>.pm = JSA1212_PM_OPS,
	<------><------>.acpi_match_table = ACPI_PTR(jsa1212_acpi_match),
	<------>},
	<------>.probe = jsa1212_probe,
	<------>.remove = jsa1212_remove,
	<------>.id_table = jsa1212_id,
	};
	module_i2c_driver(jsa1212_driver);

	MODULE_AUTHOR("Sathya Kuppuswamy <sathyanarayanan.kuppuswamy@linux.intel.com>");
	MODULE_DESCRIPTION("JSA1212 proximity/ambient light sensor driver");
	MODULE_LICENSE("GPL v2");