Re: [PATCH v5 03/11] staging: iio: ad7780: add gain reading to ad778x
From: Jonathan Cameron <jic23@kernel.org>
Date: 2019-03-16 17:54:33
Also in:
linux-iio, lkml
On Fri, 15 Mar 2019 23:13:13 -0300 Renato Lui Geh [off-list ref] wrote:
This patch adds a new functionality of reading gain values from the ad778x chips. This value is stored in the chip's state struct and is updated whenever a read or write call is performed on the driver. Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
Applied, thanks
quoted hunk ↗ jump to hunk
--- drivers/staging/iio/adc/ad7780.c | 5 +++++ 1 file changed, 5 insertions(+)diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c index f4cd7bc3e02f..fbcc0d3345ca 100644 --- a/drivers/staging/iio/adc/ad7780.c +++ b/drivers/staging/iio/adc/ad7780.c@@ -42,6 +42,8 @@ #define AD7780_GAIN_MIDPOINT 64 #define AD7780_FILTER_MIDPOINT 13350 +static const unsigned int ad778x_gain[2] = { 1, 128 }; + struct ad7780_chip_info { struct iio_chan_spec channel; unsigned int pattern_mask;@@ -179,6 +181,9 @@ static int ad7780_postprocess_sample(struct ad_sigma_delta *sigma_delta, ((raw_sample & chip_info->pattern_mask) != chip_info->pattern)) return -EIO; + if (chip_info->is_ad778x) + st->gain = ad778x_gain[raw_sample & AD7780_GAIN]; + return 0; }