linux.git/drivers/iio/adc, branch v3.12

iio: at91: fix adc_clk overflow

2013-09-18T18:43:20+00:00

The adc_clk variable is currently defined using a 32-bits unsigned integer,
which will overflow under some very valid range of operations.

Such overflow will occur if, for example, the parent clock is set to a
20MHz frequency and the ADC startup time is larger than 215ns.

To fix this, introduce an intermediate variable holding the clock rate
in kHz.

Signed-off-by: Josh Wu 
Acked-by: Maxime Ripard 
Signed-off-by: Jonathan Cameron

iio: at91: Use different prescal, startup mask in MR for different IP

2013-08-29T20:49:28+00:00

For at91 boards, there are different IPs for adc. Different IPs has different
STARTUP & PRESCAL mask in ADC_MR.

Signed-off-by: Josh Wu 
Acked-by: Maxime Ripard 
Signed-off-by: Jonathan Cameron

iio: at91: introduce the multiple compatible string for different IPs.

2013-08-29T20:45:04+00:00

As use the multiple compatible string, we can remove hardware register in dt.

CC: devicetree@vger.kernel.org
Signed-off-by: Josh Wu 
Acked-by: Maxime Ripard 
Signed-off-by: Jonathan Cameron

iio: adc: twl6030-gpadc: fix error return code in twl6030_gpadc_read_raw()

2013-08-28T19:45:43+00:00

Fix to return -EINTR in the error handling case instead
of 0 (ret is assigned after goto, which has no effect),
as done elsewhere in this function.

Signed-off-by: Wei Yongjun 
Reported-by: Dan Carpenter 
Signed-off-by: Jonathan Cameron

iio: adc: twl6030-gpadc: Use devm_* API family

2013-08-19T19:15:14+00:00

Using devm_iio_device_alloc and devm_request_threaded_irq makes
code simpler.

Signed-off-by: Oleksandr Kozaruk 
Signed-off-by: Jonathan Cameron

iio: twl6030-gpadc: TWL6030, TWL6032 GPADC driver

2013-08-17T14:50:57+00:00

The GPADC is general purpose ADC found on TWL6030, and TWL6032 PMIC,
known also as Phoenix and PhoenixLite.

The TWL6030 and TWL6032 have GPADC with 17 and 19 channels
respectively. Some channels have current source and are used for
measuring voltage drop on resistive load for detecting battery ID
resistance, or measuring voltage drop on NTC resistors for external
temperature measurements. Some channels measure voltage, (i.e. battery
voltage), and have voltage dividers, thus, capable to scale voltage.
Some channels are dedicated for measuring die temperature.

Some channels are calibrated in 2 points, having offsets from ideal
values kept in trim registers. This is used to correct measurements.

The differences between GPADC in TWL6030 and TWL6032:
- 10 bit vs 12 bit ADC;
- 17 vs 19 channels;
- channels have different purpose(i.e. battery voltage
  channel 8 vs channel 18);
- trim values are interpreted differently.

Based on the driver patched from Balaji TK, Graeme Gregory, Ambresh K,
Girish S Ghongdemath.

Signed-off-by: Balaji T K 
Signed-off-by: Graeme Gregory 
Signed-off-by: Oleksandr Kozaruk 
Signed-off-by: Jonathan Cameron

Merge 3.11-rc5 into staging-next

2013-08-12T17:22:49+00:00

We want the staging fixes in here as well.

Signed-off-by: Greg Kroah-Hartman

iio: adc: Update ti_am335x_adc Kconfig entry

2013-08-03T17:41:19+00:00

Make the string more readable to distinguish it from other TI ADCs.

Signed-off-by: Sachin Kamat 
Signed-off-by: Jonathan Cameron

iio: adc: ti_am335x_adc: Use devm_iio_device_alloc

2013-08-03T17:41:19+00:00

Using devm_iio_device_alloc makes code simpler.

Signed-off-by: Sachin Kamat 
Cc: Rachna Patil 
Signed-off-by: Jonathan Cameron

iio: max1363: Use devm_iio_device_alloc

2013-08-03T17:40:49+00:00

Using devm_iio_device_alloc makes code simpler.

Signed-off-by: Sachin Kamat 
Signed-off-by: Jonathan Cameron