Commit Graph

12 Commits

Author SHA1 Message Date
Fabio Baltieri c0214f9894 hwmon: (ina2xx) Cast to s16 on shunt and current regs
All devices supported by ina2xx are bidirectional and report the
measured shunt voltage and power values as a signed 16 bit, but the
current driver implementation caches all registers as u16, leading
to an incorrect sign extension when reporting to userspace in
ina2xx_get_value().

This patch fixes the problem by casting the signed registers to s16.
Tested on an INA219.

Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com>
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2014-06-12 08:36:18 -07:00
Guenter Roeck 468bf0e395 hwmon: (ina2xx) Convert to use devm_hwmon_device_register_with_groups
Also introduce dev variable in probe function to simplify access
to client->dev, and use new macro ATTRIBUTE_GROUPS to declare
attribute groups.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-10-13 16:16:29 -07:00
Jingoo Han 8876dd78d9 hwmon: (ina2xx) Remove casting the return value which is a void pointer
Casting the return value which is a void pointer is redundant.
The conversion from void pointer to any other pointer type is
guaranteed by the C programming language.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-09-10 06:28:31 -07:00
Jingoo Han a8b3a3a53f hwmon: use dev_get_platdata()
Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-08-11 22:10:39 -07:00
Tang Yuantian 31e7ad74f6 hwmon: (ina2xx) Add device tree support to pass the shunt resistor
Adding another way that is device tree to pass the shunt resistor
value to driver except for platform data.

Signed-off-by: Tang Yuantian <Yuantian.Tang@freescale.com>
[Guenter Roeck: Added missing of.h include]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-06-27 10:31:42 -07:00
Guenter Roeck f0df0fd92d hwmon: (ina2xx) Fix 'Avoid unnecessary line continuations' checkpatch warning
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-04-07 21:16:40 -07:00
Wei Yongjun d835ca0fd2 hwmon: (ina2xx) use module_i2c_driver to simplify the code
Use the module_i2c_driver() macro to make the code smaller
and a bit simpler.

dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2012-12-05 10:55:54 -08:00
Jean Delvare dcd8f39230 hwmon: Add missing inclusions of <linux/jiffies.h>
Many hwmon drivers use jiffies but omit the inclusion of the header
file. Fix that, and also fix one driver which was including the header
file but didn't need it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Luca Tettamanti <kronos.it@gmail.com>
Cc: Marc Hulsman <m.hulsman@tudelft.nl>
Cc: Rudolf Marek <r.marek@assembler.cz>
2012-10-10 15:25:56 +02:00
Guenter Roeck dc92cd0c13 hwmon: (ina2xx) Add support for INA220 and INA230
INA220 is register compatible to INA219, and INA230 is register compatible to
INA226, so all we need to do is to add name aliases for those two chips.

Cc: Lothar Felten <l-felten@ti.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
2012-09-23 21:08:35 -07:00
Guenter Roeck 6106db25c2 hwmon: (ina2xx) Use structure array to distinguish chip types
Replace per-device initialization and per-device calculation code with
per-device configuration data, which is then used to configure the chip and
perform calculations based on that data.

This patch reduces code size by more than 400 bytes on x86_64.

Cc: Lothar Felten <l-felten@ti.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
2012-09-23 21:08:34 -07:00
Guenter Roeck 080b98e9ab hwmon: (ina2xx) Fix word size register read and write operations
The driver uses be16_to_cpu and cpu_to_be16 to convert data in SMBus word
operations from chip to host byte order. However, the data passed from and to
the SMBus word API functions is in host byte order, not in chip byte order.
Conversion should therefore use swab16 instead of be16 to change the byte order.

Replace driver internal word conversion functions with SMBus API functions to
solve the problem.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Cc: stable@vger.kernel.org # 3.5+
Acked-by: Jean Delvare <khali@linux-fr.org>
2012-09-12 06:42:11 -07:00
Felten, Lothar f7c2fe386a hwmon: INA219 and INA226 support
Add support for the Texas Instruments INA219 and INA226 power monitors.

Signed-off-by: Lothar Felten <l-felten@ti.com>
[guenter.roeck@ericsson.com: formatting cleanup; check for smbus word data;
 select PGA=8 for INA219]
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
2012-05-22 06:48:02 -07:00