Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * isl29125.c - Support for Intersil ISL29125 RGB light sensor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2014 Peter Meerwald <pmeerw@pmeerw.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * RGB light sensor with 16-bit channels for red, green, blue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * 7-bit I2C slave address 0x44
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * TODO: interrupt support, IR compensation, thresholds, 12bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/iio/iio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/iio/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/iio/trigger_consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/iio/buffer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/iio/triggered_buffer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define ISL29125_DRV_NAME "isl29125"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define ISL29125_DEVICE_ID 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define ISL29125_CONF1 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define ISL29125_CONF2 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define ISL29125_CONF3 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define ISL29125_STATUS 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define ISL29125_GREEN_DATA 0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define ISL29125_RED_DATA 0x0b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define ISL29125_BLUE_DATA 0x0d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define ISL29125_ID 0x7d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define ISL29125_MODE_MASK GENMASK(2, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define ISL29125_MODE_PD 0x0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #define ISL29125_MODE_G 0x1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #define ISL29125_MODE_R 0x2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define ISL29125_MODE_B 0x3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define ISL29125_MODE_RGB 0x5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #define ISL29125_SENSING_RANGE_0 5722   /* 375 lux full range */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) #define ISL29125_SENSING_RANGE_1 152590 /* 10k lux full range */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #define ISL29125_MODE_RANGE BIT(3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) #define ISL29125_STATUS_CONV BIT(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) struct isl29125_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	u8 conf1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	/* Ensure timestamp is naturally aligned */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		u16 chans[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		s64 timestamp __aligned(8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	} scan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) #define ISL29125_CHANNEL(_color, _si) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	.type = IIO_INTENSITY, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	.modified = 1, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	.channel2 = IIO_MOD_LIGHT_##_color, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	.scan_index = _si, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	.scan_type = { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		.sign = 'u', \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		.realbits = 16, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		.storagebits = 16, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		.endianness = IIO_CPU, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	}, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) static const struct iio_chan_spec isl29125_channels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	ISL29125_CHANNEL(GREEN, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	ISL29125_CHANNEL(RED, 1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	ISL29125_CHANNEL(BLUE, 2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	IIO_CHAN_SOFT_TIMESTAMP(3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) static const struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	u8 mode, data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) } isl29125_regs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	{ISL29125_MODE_G, ISL29125_GREEN_DATA},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	{ISL29125_MODE_R, ISL29125_RED_DATA},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	{ISL29125_MODE_B, ISL29125_BLUE_DATA},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) static int isl29125_read_data(struct isl29125_data *data, int si)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	int tries = 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	ret = i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		data->conf1 | isl29125_regs[si].mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	msleep(101);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	while (tries--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		ret = i2c_smbus_read_byte_data(data->client, ISL29125_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 			goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		if (ret & ISL29125_STATUS_CONV)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		msleep(20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	if (tries < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		dev_err(&data->client->dev, "data not ready\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	ret = i2c_smbus_read_word_data(data->client, isl29125_regs[si].data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	i2c_smbus_write_byte_data(data->client, ISL29125_CONF1, data->conf1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static int isl29125_read_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			   struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			   int *val, int *val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	struct isl29125_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	case IIO_CHAN_INFO_RAW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		ret = iio_device_claim_direct_mode(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		ret = isl29125_read_data(data, chan->scan_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		iio_device_release_direct_mode(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		*val = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	case IIO_CHAN_INFO_SCALE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		*val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		if (data->conf1 & ISL29125_MODE_RANGE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			*val2 = ISL29125_SENSING_RANGE_1; /*10k lux full range*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			*val2 = ISL29125_SENSING_RANGE_0; /*375 lux full range*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		return IIO_VAL_INT_PLUS_MICRO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static int isl29125_write_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 			       struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			       int val, int val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	struct isl29125_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	case IIO_CHAN_INFO_SCALE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		if (val != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		if (val2 == ISL29125_SENSING_RANGE_1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 			data->conf1 |= ISL29125_MODE_RANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		else if (val2 == ISL29125_SENSING_RANGE_0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			data->conf1 &= ~ISL29125_MODE_RANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 			data->conf1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static irqreturn_t isl29125_trigger_handler(int irq, void *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	struct iio_poll_func *pf = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	struct iio_dev *indio_dev = pf->indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	struct isl29125_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	int i, j = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	for_each_set_bit(i, indio_dev->active_scan_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		indio_dev->masklength) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		int ret = i2c_smbus_read_word_data(data->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 			isl29125_regs[i].data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 			goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		data->scan.chans[j++] = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		iio_get_time_ns(indio_dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	iio_trigger_notify_done(indio_dev->trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static IIO_CONST_ATTR(scale_available, "0.005722 0.152590");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static struct attribute *isl29125_attributes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	&iio_const_attr_scale_available.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static const struct attribute_group isl29125_attribute_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	.attrs = isl29125_attributes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static const struct iio_info isl29125_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	.read_raw = isl29125_read_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	.write_raw = isl29125_write_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	.attrs = &isl29125_attribute_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) static int isl29125_buffer_postenable(struct iio_dev *indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	struct isl29125_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	data->conf1 |= ISL29125_MODE_RGB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		data->conf1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) static int isl29125_buffer_predisable(struct iio_dev *indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	struct isl29125_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	data->conf1 &= ~ISL29125_MODE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	data->conf1 |= ISL29125_MODE_PD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		data->conf1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static const struct iio_buffer_setup_ops isl29125_buffer_setup_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	.postenable = isl29125_buffer_postenable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	.predisable = isl29125_buffer_predisable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static int isl29125_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 			   const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	struct isl29125_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	if (indio_dev == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	i2c_set_clientdata(client, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	data->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	indio_dev->info = &isl29125_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	indio_dev->name = ISL29125_DRV_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	indio_dev->channels = isl29125_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	indio_dev->num_channels = ARRAY_SIZE(isl29125_channels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	indio_dev->modes = INDIO_DIRECT_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	ret = i2c_smbus_read_byte_data(data->client, ISL29125_DEVICE_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	if (ret != ISL29125_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	data->conf1 = ISL29125_MODE_PD | ISL29125_MODE_RANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	ret = i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		data->conf1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	ret = i2c_smbus_write_byte_data(data->client, ISL29125_STATUS, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	ret = iio_triggered_buffer_setup(indio_dev, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		isl29125_trigger_handler, &isl29125_buffer_setup_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	ret = iio_device_register(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		goto buffer_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) buffer_cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	iio_triggered_buffer_cleanup(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) static int isl29125_powerdown(struct isl29125_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		(data->conf1 & ~ISL29125_MODE_MASK) | ISL29125_MODE_PD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static int isl29125_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	iio_device_unregister(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	iio_triggered_buffer_cleanup(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	isl29125_powerdown(iio_priv(indio_dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) static int isl29125_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	struct isl29125_data *data = iio_priv(i2c_get_clientdata(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		to_i2c_client(dev)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	return isl29125_powerdown(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) static int isl29125_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	struct isl29125_data *data = iio_priv(i2c_get_clientdata(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		to_i2c_client(dev)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 		data->conf1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) static SIMPLE_DEV_PM_OPS(isl29125_pm_ops, isl29125_suspend, isl29125_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static const struct i2c_device_id isl29125_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	{ "isl29125", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	{ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) MODULE_DEVICE_TABLE(i2c, isl29125_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) static struct i2c_driver isl29125_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		.name	= ISL29125_DRV_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		.pm	= &isl29125_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	.probe		= isl29125_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	.remove		= isl29125_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	.id_table	= isl29125_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) module_i2c_driver(isl29125_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) MODULE_DESCRIPTION("ISL29125 RGB light sensor driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) MODULE_LICENSE("GPL");