On Sat, 15 Jul 2023 14:05:57 +0300 George Stark <gnstark@xxxxxxxxxxxxxx> wrote: > This patch is a part of effort to support meson a1 SoC and make meson saradc driver > independent from vendor boot code initialization in common. > > Information was taken from vendor kernel 5.4, 4.19 and vendor uboot 2019. > Most of the bits are undocumented at all or it's not said how they affect measuring. > > All those bits are already initialized in bl* code and since kernel driver dosn't > rewrite or reset any registers but only changes some bits at init stage everything > works fine. > > Test procedure is rather simple - one can change those bits in runtime > (e.g. using devmem) and try to read channels (cat /sys/bus/platform/drivers/meson-saradc/.../iio:device0/*) > changing some of those bits leads to measure procedure errors or abnormal results. > Another test is build meson saradc as module, reset adc by reset bit, reload module > and compare measure results to those got before reset. > > George Stark (3): > iio: adc: meson: init channels 0,1 input muxes > iio: adc: meson: init internal continuous ring counter > iio: adc: meson: init voltage control bits > > drivers/iio/adc/meson_saradc.c | 73 ++++++++++++++++++++++++++++++++++ > 1 file changed, 73 insertions(+) > These look fine to me, but I'd like them to sit on list a little while on off chance anyone else has feedback on them. Thanks, Jonathan
