iio: adc: aspeed: Add func to set sampling rate.

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Add the function to set the sampling rate and keep the sampling period
for a driver used to wait the fresh value.
In addition, since the ADC clock is required when initializing the ADC
device, move clk_prepare_enable ahead of the initialization phase.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20210922081520.30580-9-billy_tsai@aspeedtech.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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Billy Tsai 2021-09-22 16:15:17 +08:00 • committed by Jonathan Cameron

parent 90f9647753

commit 13d4f9df33

1 changed files with 39 additions and 19 deletions

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drivers/iio/adc/aspeed_adc.c

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