iio: adc: aspeed: Add vref config function

Add the function to check the vref_fixed_mv and set the value to driver
data.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210922081520.30580-4-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Billy Tsai 2021-09-22 16:15:12 +08:00 • committed by Jonathan Cameron
commit 1de952a4b1