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)  * lmp91000.c - Support for Texas Instruments digital potentiostats
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2016, 2018
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Author: Matt Ranostay <matt.ranostay@konsulko.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * TODO: bias voltage + polarity control, and multiple chip support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/mod_devicetable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/iio/iio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/iio/buffer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/iio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/iio/trigger.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/triggered_buffer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define LMP91000_REG_LOCK		0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define LMP91000_REG_TIACN		0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define LMP91000_REG_TIACN_GAIN_SHIFT	2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define LMP91000_REG_REFCN		0x11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define LMP91000_REG_REFCN_EXT_REF	0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define LMP91000_REG_REFCN_50_ZERO	0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define LMP91000_REG_MODECN		0x12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define LMP91000_REG_MODECN_3LEAD	0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define LMP91000_REG_MODECN_TEMP	0x07
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define LMP91000_DRV_NAME	"lmp91000"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) static const int lmp91000_tia_gain[] = { 0, 2750, 3500, 7000, 14000, 35000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 					 120000, 350000 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) static const int lmp91000_rload[] = { 10, 33, 50, 100 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define LMP91000_TEMP_BASE	-40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) static const u16 lmp91000_temp_lut[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	1875, 1867, 1860, 1852, 1844, 1836, 1828, 1821, 1813, 1805,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	1797, 1789, 1782, 1774, 1766, 1758, 1750, 1742, 1734, 1727,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	1719, 1711, 1703, 1695, 1687, 1679, 1671, 1663, 1656, 1648,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	1640, 1632, 1624, 1616, 1608, 1600, 1592, 1584, 1576, 1568,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	1560, 1552, 1544, 1536, 1528, 1520, 1512, 1504, 1496, 1488,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	1480, 1472, 1464, 1456, 1448, 1440, 1432, 1424, 1415, 1407,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	1399, 1391, 1383, 1375, 1367, 1359, 1351, 1342, 1334, 1326,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	1318, 1310, 1302, 1293, 1285, 1277, 1269, 1261, 1253, 1244,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	1236, 1228, 1220, 1212, 1203, 1195, 1187, 1179, 1170, 1162,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	1154, 1146, 1137, 1129, 1121, 1112, 1104, 1096, 1087, 1079,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	1071, 1063, 1054, 1046, 1038, 1029, 1021, 1012, 1004,  996,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	 987,  979,  971,  962,  954,  945,  937,  929,  920,  912,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	 903,  895,  886,  878,  870,  861 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) static const struct regmap_config lmp91000_regmap_config = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	.reg_bits = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	.val_bits = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) struct lmp91000_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct regmap *regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	struct iio_trigger *trig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	struct iio_cb_buffer *cb_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	struct iio_channel *adc_chan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	struct completion completion;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	u8 chan_select;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	/* 64-bit data + 64-bit naturally aligned timestamp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	u32 buffer[4] __aligned(8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) static const struct iio_chan_spec lmp91000_channels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	{ /* chemical channel mV */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		.type = IIO_VOLTAGE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		.channel = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		.address = LMP91000_REG_MODECN_3LEAD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 				      BIT(IIO_CHAN_INFO_OFFSET) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 				      BIT(IIO_CHAN_INFO_SCALE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		.scan_index = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		.scan_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 			.sign = 's',
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 			.realbits = 32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 			.storagebits = 32,
^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) 	IIO_CHAN_SOFT_TIMESTAMP(1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	{ /* temperature channel mV */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		.type = IIO_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		.channel = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		.address = LMP91000_REG_MODECN_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		.scan_index = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int lmp91000_read(struct lmp91000_data *data, int channel, int *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	int state, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	ret = regmap_read(data->regmap, LMP91000_REG_MODECN, &state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	ret = regmap_write(data->regmap, LMP91000_REG_MODECN, channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	/* delay till first temperature reading is complete */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	if (state != channel && channel == LMP91000_REG_MODECN_TEMP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		usleep_range(3000, 4000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	data->chan_select = channel != LMP91000_REG_MODECN_3LEAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	iio_trigger_poll_chained(data->trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	ret = wait_for_completion_timeout(&data->completion, HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	reinit_completion(&data->completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		return -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	*val = data->buffer[data->chan_select];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static irqreturn_t lmp91000_buffer_handler(int irq, void *private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	struct iio_poll_func *pf = private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	struct iio_dev *indio_dev = pf->indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct lmp91000_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	int ret, val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	memset(data->buffer, 0, sizeof(data->buffer));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	ret = lmp91000_read(data, LMP91000_REG_MODECN_3LEAD, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		data->buffer[0] = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 						   iio_get_time_ns(indio_dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	iio_trigger_notify_done(indio_dev->trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static int lmp91000_read_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			     struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			     int *val, int *val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	struct lmp91000_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	case IIO_CHAN_INFO_RAW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	case IIO_CHAN_INFO_PROCESSED: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		int ret = iio_channel_start_all_cb(data->cb_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		ret = lmp91000_read(data, chan->address, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		iio_channel_stop_all_cb(data->cb_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		if (mask == IIO_CHAN_INFO_PROCESSED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			int tmp, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 			ret = iio_convert_raw_to_processed(data->adc_chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 							   *val, &tmp, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 				return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 			for (i = 0; i < ARRAY_SIZE(lmp91000_temp_lut); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 				if (lmp91000_temp_lut[i] < tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 					break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 			*val = (LMP91000_TEMP_BASE + i) * 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	case IIO_CHAN_INFO_OFFSET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		return iio_read_channel_offset(data->adc_chan, val, val2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	case IIO_CHAN_INFO_SCALE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		return iio_read_channel_scale(data->adc_chan, val, val2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) static const struct iio_info lmp91000_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	.read_raw = lmp91000_read_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static int lmp91000_read_config(struct lmp91000_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	struct device *dev = data->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	unsigned int reg, val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	ret = device_property_read_u32(dev, "ti,tia-gain-ohm", &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		if (!device_property_read_bool(dev, "ti,external-tia-resistor")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 			dev_err(dev, "no ti,tia-gain-ohm defined and external resistor not specified\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		val = 0;
^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) 	ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	for (i = 0; i < ARRAY_SIZE(lmp91000_tia_gain); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		if (lmp91000_tia_gain[i] == val) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 			reg = i << LMP91000_REG_TIACN_GAIN_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 			ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		}
^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) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		dev_err(dev, "invalid ti,tia-gain-ohm %d\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	ret = device_property_read_u32(dev, "ti,rload-ohm", &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		val = 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		dev_info(dev, "no ti,rload-ohm defined, default to %d\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	for (i = 0; i < ARRAY_SIZE(lmp91000_rload); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		if (lmp91000_rload[i] == val) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 			reg |= i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 			ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 			break;
^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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		dev_err(dev, "invalid ti,rload-ohm %d\n", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		return ret;
^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) 	regmap_write(data->regmap, LMP91000_REG_LOCK, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	regmap_write(data->regmap, LMP91000_REG_TIACN, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	regmap_write(data->regmap, LMP91000_REG_REFCN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		     LMP91000_REG_REFCN_EXT_REF | LMP91000_REG_REFCN_50_ZERO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	regmap_write(data->regmap, LMP91000_REG_LOCK, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) static int lmp91000_buffer_cb(const void *val, void *private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	struct iio_dev *indio_dev = private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	struct lmp91000_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	data->buffer[data->chan_select] = *((int *)val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	complete_all(&data->completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) static const struct iio_trigger_ops lmp91000_trigger_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) static int lmp91000_buffer_postenable(struct iio_dev *indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	struct lmp91000_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	return iio_channel_start_all_cb(data->cb_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) static int lmp91000_buffer_predisable(struct iio_dev *indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	struct lmp91000_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	iio_channel_stop_all_cb(data->cb_buffer);
^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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) static const struct iio_buffer_setup_ops lmp91000_buffer_setup_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	.postenable = lmp91000_buffer_postenable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	.predisable = lmp91000_buffer_predisable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) static int lmp91000_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 			  const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	struct device *dev = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	struct lmp91000_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	if (!indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	indio_dev->info = &lmp91000_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	indio_dev->channels = lmp91000_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	indio_dev->num_channels = ARRAY_SIZE(lmp91000_channels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	indio_dev->name = LMP91000_DRV_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	indio_dev->modes = INDIO_DIRECT_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	i2c_set_clientdata(client, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	data->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	data->regmap = devm_regmap_init_i2c(client, &lmp91000_regmap_config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	if (IS_ERR(data->regmap)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 		dev_err(dev, "regmap initialization failed.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		return PTR_ERR(data->regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	data->trig = devm_iio_trigger_alloc(data->dev, "%s-mux%d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 					    indio_dev->name, indio_dev->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	if (!data->trig) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 		dev_err(dev, "cannot allocate iio trigger.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	data->trig->ops = &lmp91000_trigger_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	data->trig->dev.parent = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	init_completion(&data->completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	ret = lmp91000_read_config(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	ret = iio_trigger_set_immutable(iio_channel_cb_get_iio_dev(data->cb_buffer),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 					data->trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 		dev_err(dev, "cannot set immutable trigger.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	ret = iio_trigger_register(data->trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		dev_err(dev, "cannot register iio trigger.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	ret = iio_triggered_buffer_setup(indio_dev, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 					 &lmp91000_buffer_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 					 &lmp91000_buffer_setup_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 		goto error_unreg_trigger;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	data->cb_buffer = iio_channel_get_all_cb(dev, &lmp91000_buffer_cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 						 indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	if (IS_ERR(data->cb_buffer)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 		if (PTR_ERR(data->cb_buffer) == -ENODEV)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 			ret = -EPROBE_DEFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 			ret = PTR_ERR(data->cb_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		goto error_unreg_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	data->adc_chan = iio_channel_cb_get_channels(data->cb_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	ret = iio_device_register(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 		goto error_unreg_cb_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) error_unreg_cb_buffer:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	iio_channel_release_all_cb(data->cb_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) error_unreg_buffer:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	iio_triggered_buffer_cleanup(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) error_unreg_trigger:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	iio_trigger_unregister(data->trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) static int lmp91000_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 	struct lmp91000_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	iio_device_unregister(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	iio_channel_stop_all_cb(data->cb_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 	iio_channel_release_all_cb(data->cb_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	iio_triggered_buffer_cleanup(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 	iio_trigger_unregister(data->trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) static const struct of_device_id lmp91000_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	{ .compatible = "ti,lmp91000", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	{ .compatible = "ti,lmp91002", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 	{ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) MODULE_DEVICE_TABLE(of, lmp91000_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) static const struct i2c_device_id lmp91000_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	{ "lmp91000", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	{ "lmp91002", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) MODULE_DEVICE_TABLE(i2c, lmp91000_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) static struct i2c_driver lmp91000_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 		.name = LMP91000_DRV_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 		.of_match_table = lmp91000_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	.probe = lmp91000_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 	.remove = lmp91000_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 	.id_table = lmp91000_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) module_i2c_driver(lmp91000_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) MODULE_AUTHOR("Matt Ranostay <matt.ranostay@konsulko.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) MODULE_DESCRIPTION("LMP91000 digital potentiostat");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) MODULE_LICENSE("GPL");