linux.git/drivers/hwmon/ads7828.c, branch v4.9.209

hwmon: (ads7828) Enable internal reference

2016-04-19T13:30:28+00:00

On ads7828 the internal reference defaults to off upon power up. When
using internal reference, it needs to be turned on and the voltage needs
to settle before normal conversion cycle can be started. Hence perform a
dummy read in the probe to enable the internal reference allowing the
voltage to settle before performing a normal read.

Without this fix, the first read from the ADC when using internal
reference always returns incorrect data.

Signed-off-by: Akshay Bhat 
Cc: stable@vger.kernel.org # v4.1+
Signed-off-by: Guenter Roeck

hwmon: (ads7828) Check return value of devm_regmap_init_i2c

2015-02-23T04:10:30+00:00

devm_regmap_init_i2c() can fail, thus add return value checking.

Signed-off-by: Axel Lin 
Signed-off-by: Guenter Roeck

hwmon: (ads2828) Only keep data in device data structure if needed

2015-02-02T16:20:06+00:00

The variables diff_input, ext_vref, and vref_mv are only used in the probe
function and therefore don't need to be kept in the device data structure.

Reviewed-and-Tested-by: Robert Rosengren 
Signed-off-by: Guenter Roeck

hwmon: (ads2828) Convert to use regmap

2015-02-02T16:19:58+00:00

Simplify code and reduce code size by using regmap to access i2c registers.

Reviewed-and-Tested-by: Robert Rosengren 
Signed-off-by: Guenter Roeck

hwmon: (ads7828) Convert to devm_hwmon_device_register_with_groups

2014-08-04T14:01:34+00:00

Use ATTRIBUTE_GROUPS macro and devm_hwmon_device_register_with_groups() to
simplify the code a bit.

Signed-off-by: Axel Lin 
Signed-off-by: Guenter Roeck

hwmon: use dev_get_platdata()

2013-08-12T05:10:39+00:00

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.

Signed-off-by: Jingoo Han 
Signed-off-by: Guenter Roeck

hwmon: Replace SENSORS_LIMIT with clamp_val

2013-01-26T05:03:54+00:00

SENSORS_LIMIT and the generic clamp_val have the same functionality,
and clamp_val is more efficient.

This patch reduces text size by 9052 bytes and bss size by 11624 bytes
for x86_64 builds.

Signed-off-by: Guenter Roeck 
Acked-by: George Joseph 
Acked-by: Jean Delvare

hwmon: (ads7828) add support for ADS7830

2012-12-05T18:55:54+00:00

The ADS7830 device is almost the same as the ADS7828,
except that it does 8-bit sampling, instead of 12-bit.
This patch extends the ads7828 driver to support this chip.

Signed-off-by: Guillaume Roguez 
Signed-off-by: Vivien Didelot 
Signed-off-by: Guenter Roeck

hwmon: (ads7828) driver cleanup

2012-12-05T18:55:54+00:00

As there is no reliable way to identify the chip, it is preferable to
remove the detect callback, to avoid misdetection.

Module parameters are not worth it here, so let's get rid of them and
add an ads7828_platform_data structure instead.

Clean the code by removing unused macros, fixing coding style issues,
avoiding function prototypes and using convenient macros such as
module_i2c_driver().

Signed-off-by: Vivien Didelot 
Signed-off-by: Guenter Roeck

hwmon: (ads7828) Convert to use devm_ functions

2012-09-24T04:08:30+00:00

Convert to use devm_ functions to reduce code size and simplify the code.

Signed-off-by: Guenter Roeck