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SubjectRe: [PATCH V1 1/4] qcom: spmi-wled: Add support for qcom wled driver
On 2017-11-16 22:25, Bjorn Andersson wrote:
> On Thu 16 Nov 04:18 PST 2017, Kiran Gunda wrote:
>> WLED driver provides the interface to the display driver to
>> adjust the brightness of the display backlight.
> Hi Kiran,
> This driver has a lot in common with the already upstream
> pm8941-wled.c,
> because it's just a new revision of the same block.
> Please extend the existing driver rather than providing a new one
> (and yes, renaming the file is okay).
> Regards,
> Bjorn

Hi Bjorn,

Yes this driver design is similar to pm8941, however the WLED HW block
has undergone quite a few changes in
analog and digital from PM8941 to PM8998. Few of them include splitting
one module into wled-ctrl
and wled-sink peripherals, changes in the register offsets and the bit
interpretation. Hence we
concluded that it was better to have a new driver to support this new
gen WELD module and decouple
it from the pm8941. Also, going forward this driver will support AMOLED
AVDD rail (not supported by pm8941)
touching a few more registers/configuration and newer PMICs. So spinning
off a new driver would make it
cleaner and easier to extend further.


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