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iio:adc:ltc2497: Add support for board file based iio consumer mapping. 

Add missing hooks in the LTC2497 IIO driver to allow hwmon mapping.

Signed-off-by: Gaurav Gupta <gauragup@cisco.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
hifive-unleashed-5.1
Gaurav Gupta 2017-06-27 11:59:56 -07:00 committed by Jonathan Cameron
parent 004123f3df
commit b995a732da
1 changed files with 35 additions and 19 deletions
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54
drivers/iio/adc/ltc2497.c
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@ -11,6 +11,7 @@
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/iio/iio.h>
#include <linux/iio/driver.h>
#include <linux/iio/sysfs.h>
#include <linux/module.h>
#include <linux/of.h>
@ -127,13 +128,14 @@ static int ltc2497_read_raw(struct iio_dev *indio_dev,
}
}
#define LTC2497_CHAN(_chan, _addr) { \
#define LTC2497_CHAN(_chan, _addr, _ds_name) { \
.type = IIO_VOLTAGE, \
.indexed = 1, \
.channel = (_chan), \
.address = (_addr | (_chan / 2) | ((_chan & 1) ? LTC2497_SIGN : 0)), \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
.datasheet_name = (_ds_name), \
}
#define LTC2497_CHAN_DIFF(_chan, _addr) { \
@ -148,22 +150,22 @@ static int ltc2497_read_raw(struct iio_dev *indio_dev,
}
static const struct iio_chan_spec ltc2497_channel[] = {
LTC2497_CHAN(0, LTC2497_SGL),
LTC2497_CHAN(1, LTC2497_SGL),
LTC2497_CHAN(2, LTC2497_SGL),
LTC2497_CHAN(3, LTC2497_SGL),
LTC2497_CHAN(4, LTC2497_SGL),
LTC2497_CHAN(5, LTC2497_SGL),
LTC2497_CHAN(6, LTC2497_SGL),
LTC2497_CHAN(7, LTC2497_SGL),
LTC2497_CHAN(8, LTC2497_SGL),
LTC2497_CHAN(9, LTC2497_SGL),
LTC2497_CHAN(10, LTC2497_SGL),
LTC2497_CHAN(11, LTC2497_SGL),
LTC2497_CHAN(12, LTC2497_SGL),
LTC2497_CHAN(13, LTC2497_SGL),
LTC2497_CHAN(14, LTC2497_SGL),
LTC2497_CHAN(15, LTC2497_SGL),
LTC2497_CHAN(0, LTC2497_SGL, "CH0"),
LTC2497_CHAN(1, LTC2497_SGL, "CH1"),
LTC2497_CHAN(2, LTC2497_SGL, "CH2"),
LTC2497_CHAN(3, LTC2497_SGL, "CH3"),
LTC2497_CHAN(4, LTC2497_SGL, "CH4"),
LTC2497_CHAN(5, LTC2497_SGL, "CH5"),
LTC2497_CHAN(6, LTC2497_SGL, "CH6"),
LTC2497_CHAN(7, LTC2497_SGL, "CH7"),
LTC2497_CHAN(8, LTC2497_SGL, "CH8"),
LTC2497_CHAN(9, LTC2497_SGL, "CH9"),
LTC2497_CHAN(10, LTC2497_SGL, "CH10"),
LTC2497_CHAN(11, LTC2497_SGL, "CH11"),
LTC2497_CHAN(12, LTC2497_SGL, "CH12"),
LTC2497_CHAN(13, LTC2497_SGL, "CH13"),
LTC2497_CHAN(14, LTC2497_SGL, "CH14"),
LTC2497_CHAN(15, LTC2497_SGL, "CH15"),
LTC2497_CHAN_DIFF(0, LTC2497_DIFF),
LTC2497_CHAN_DIFF(1, LTC2497_DIFF),
LTC2497_CHAN_DIFF(2, LTC2497_DIFF),
@ -192,6 +194,7 @@ static int ltc2497_probe(struct i2c_client *client,
{
struct iio_dev *indio_dev;
struct ltc2497_st *st;
struct iio_map *plat_data;
int ret;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C |
@ -221,19 +224,31 @@ static int ltc2497_probe(struct i2c_client *client,
if (ret < 0)
return ret;
if (client->dev.platform_data) {
plat_data = ((struct iio_map *)client->dev.platform_data);
ret = iio_map_array_register(indio_dev, plat_data);
if (ret) {
dev_err(&indio_dev->dev, "iio map err: %d\n", ret);
goto err_regulator_disable;
}
}
ret = i2c_smbus_write_byte(st->client, LTC2497_CONFIG_DEFAULT);
if (ret < 0)
goto err_regulator_disable;
goto err_array_unregister;
st->addr_prev = LTC2497_CONFIG_DEFAULT;
st->time_prev = ktime_get();
ret = iio_device_register(indio_dev);
if (ret < 0)
goto err_regulator_disable;
goto err_array_unregister;
return 0;
err_array_unregister:
iio_map_array_unregister(indio_dev);
err_regulator_disable:
regulator_disable(st->ref);
@ -245,6 +260,7 @@ static int ltc2497_remove(struct i2c_client *client)
struct iio_dev *indio_dev = i2c_get_clientdata(client);
struct ltc2497_st *st = iio_priv(indio_dev);
iio_map_array_unregister(indio_dev);
iio_device_unregister(indio_dev);
regulator_disable(st->ref);