Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * hdc2010.c - Support for the TI HDC2010 and HDC2080
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * temperature + relative humidity sensors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 2020 Norphonic AS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Author: Eugene Zaikonnikov <ez@norphonic.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Datasheet: https://www.ti.com/product/HDC2010/datasheet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * Datasheet: https://www.ti.com/product/HDC2080/datasheet
^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/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/bitops.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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define HDC2010_REG_TEMP_LOW			0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define HDC2010_REG_TEMP_HIGH			0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define HDC2010_REG_HUMIDITY_LOW		0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define HDC2010_REG_HUMIDITY_HIGH		0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define HDC2010_REG_INTERRUPT_DRDY		0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define HDC2010_REG_TEMP_MAX			0x05
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define HDC2010_REG_HUMIDITY_MAX		0x06
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define HDC2010_REG_INTERRUPT_EN		0x07
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define HDC2010_REG_TEMP_OFFSET_ADJ		0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define HDC2010_REG_HUMIDITY_OFFSET_ADJ		0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define HDC2010_REG_TEMP_THR_L			0x0a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define HDC2010_REG_TEMP_THR_H			0x0b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define HDC2010_REG_RH_THR_L			0x0c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define HDC2010_REG_RH_THR_H			0x0d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define HDC2010_REG_RESET_DRDY_INT_CONF		0x0e
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define HDC2010_REG_MEASUREMENT_CONF		0x0f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define HDC2010_MEAS_CONF			GENMASK(2, 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #define HDC2010_MEAS_TRIG			BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #define HDC2010_HEATER_EN			BIT(3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define HDC2010_AMM				GENMASK(6, 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) struct hdc2010_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	u8 measurement_config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	u8 interrupt_config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	u8 drdy_config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) enum hdc2010_addr_groups {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	HDC2010_GROUP_TEMP = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	HDC2010_GROUP_HUMIDITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) struct hdc2010_reg_record {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	unsigned long primary;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	unsigned long peak;
^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) static const struct hdc2010_reg_record hdc2010_reg_translation[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	[HDC2010_GROUP_TEMP] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		.primary = HDC2010_REG_TEMP_LOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		.peak = HDC2010_REG_TEMP_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	[HDC2010_GROUP_HUMIDITY] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		.primary = HDC2010_REG_HUMIDITY_LOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		.peak = HDC2010_REG_HUMIDITY_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) static IIO_CONST_ATTR(out_current_heater_raw_available, "0 1");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) static struct attribute *hdc2010_attributes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	&iio_const_attr_out_current_heater_raw_available.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) static const struct attribute_group hdc2010_attribute_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	.attrs = hdc2010_attributes,
^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 iio_chan_spec hdc2010_channels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		.type = IIO_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		.address = HDC2010_GROUP_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 			BIT(IIO_CHAN_INFO_PEAK) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 			BIT(IIO_CHAN_INFO_OFFSET) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 			BIT(IIO_CHAN_INFO_SCALE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		.type = IIO_HUMIDITYRELATIVE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		.address = HDC2010_GROUP_HUMIDITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			BIT(IIO_CHAN_INFO_PEAK) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			BIT(IIO_CHAN_INFO_SCALE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		.type = IIO_CURRENT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		.extend_name = "heater",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		.output = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static int hdc2010_update_drdy_config(struct hdc2010_data *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 					     char mask, char val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	u8 tmp = (~mask & data->drdy_config) | val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	ret = i2c_smbus_write_byte_data(data->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 					HDC2010_REG_RESET_DRDY_INT_CONF, tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	data->drdy_config = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static int hdc2010_get_prim_measurement_word(struct hdc2010_data *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 					     struct iio_chan_spec const *chan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	struct i2c_client *client = data->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	s32 ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	ret = i2c_smbus_read_word_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			hdc2010_reg_translation[chan->address].primary);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		dev_err(&client->dev, "Could not read sensor measurement word\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static int hdc2010_get_peak_measurement_byte(struct hdc2010_data *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 					     struct iio_chan_spec const *chan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	struct i2c_client *client = data->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	s32 ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	ret = i2c_smbus_read_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 			hdc2010_reg_translation[chan->address].peak);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		dev_err(&client->dev, "Could not read sensor measurement byte\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static int hdc2010_get_heater_status(struct hdc2010_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	return !!(data->drdy_config & HDC2010_HEATER_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static int hdc2010_read_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 			    struct iio_chan_spec const *chan, int *val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 			    int *val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	struct hdc2010_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	case IIO_CHAN_INFO_RAW: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		if (chan->type == IIO_CURRENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			*val = hdc2010_get_heater_status(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 			return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		ret = iio_device_claim_direct_mode(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		mutex_lock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		ret = hdc2010_get_prim_measurement_word(data, chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		mutex_unlock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		iio_device_release_direct_mode(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		*val = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	case IIO_CHAN_INFO_PEAK: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		ret = iio_device_claim_direct_mode(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		mutex_lock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		ret = hdc2010_get_peak_measurement_byte(data, chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		mutex_unlock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		iio_device_release_direct_mode(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		/* Scaling up the value so we can use same offset as RAW */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		*val = ret * 256;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	case IIO_CHAN_INFO_SCALE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		*val2 = 65536;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		if (chan->type == IIO_TEMP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 			*val = 165000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 			*val = 100000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		return IIO_VAL_FRACTIONAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	case IIO_CHAN_INFO_OFFSET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		*val = -15887;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		*val2 = 515151;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		return IIO_VAL_INT_PLUS_MICRO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static int hdc2010_write_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 			     struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 			     int val, int val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	struct hdc2010_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	int new, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	case IIO_CHAN_INFO_RAW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		if (chan->type != IIO_CURRENT || val2 != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		switch (val) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 			new = HDC2010_HEATER_EN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 			new = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 			return -EINVAL;
^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) 		mutex_lock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		ret = hdc2010_update_drdy_config(data, HDC2010_HEATER_EN, new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		mutex_unlock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static const struct iio_info hdc2010_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	.read_raw = hdc2010_read_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	.write_raw = hdc2010_write_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	.attrs = &hdc2010_attribute_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) static int hdc2010_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 			 const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	struct hdc2010_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	u8 tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	if (!i2c_check_functionality(client->adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	    I2C_FUNC_SMBUS_WORD_DATA | I2C_FUNC_SMBUS_BYTE | I2C_FUNC_I2C))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	if (!indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	i2c_set_clientdata(client, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	data->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	mutex_init(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	indio_dev->dev.parent = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	 * As DEVICE ID register does not differentiate between
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	 * HDC2010 and HDC2080, we have the name hardcoded
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	indio_dev->name = "hdc2010";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	indio_dev->modes = INDIO_DIRECT_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	indio_dev->info = &hdc2010_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	indio_dev->channels = hdc2010_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	indio_dev->num_channels = ARRAY_SIZE(hdc2010_channels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	/* Enable Automatic Measurement Mode at 5Hz */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	ret = hdc2010_update_drdy_config(data, HDC2010_AMM, HDC2010_AMM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	 * We enable both temp and humidity measurement.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	 * However the measurement won't start even in AMM until triggered.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	tmp = (data->measurement_config & ~HDC2010_MEAS_CONF) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		HDC2010_MEAS_TRIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	ret = i2c_smbus_write_byte_data(client, HDC2010_REG_MEASUREMENT_CONF, tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		dev_warn(&client->dev, "Unable to set up measurement\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		if (hdc2010_update_drdy_config(data, HDC2010_AMM, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 			dev_warn(&client->dev, "Unable to restore default AMM\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	data->measurement_config = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	return iio_device_register(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) static int hdc2010_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	struct hdc2010_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	iio_device_unregister(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	/* Disable Automatic Measurement Mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	if (hdc2010_update_drdy_config(data, HDC2010_AMM, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 		dev_warn(&client->dev, "Unable to restore default AMM\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) static const struct i2c_device_id hdc2010_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	{ "hdc2010" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	{ "hdc2080" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	{ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) MODULE_DEVICE_TABLE(i2c, hdc2010_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static const struct of_device_id hdc2010_dt_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	{ .compatible = "ti,hdc2010" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	{ .compatible = "ti,hdc2080" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	{ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) MODULE_DEVICE_TABLE(of, hdc2010_dt_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) static struct i2c_driver hdc2010_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		.name	= "hdc2010",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 		.of_match_table = hdc2010_dt_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	.probe = hdc2010_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	.remove = hdc2010_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	.id_table = hdc2010_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) module_i2c_driver(hdc2010_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) MODULE_AUTHOR("Eugene Zaikonnikov <ez@norphonic.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) MODULE_DESCRIPTION("TI HDC2010 humidity and temperature sensor driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) MODULE_LICENSE("GPL");