[PATCH] backlight: ktd253: Bring up in a known state

[Daniel Thompson]

On Tue, Jan 26, 2021 at 10:32:00PM +0100, Linus Walleij wrote:
> The KTD253 backlight might already be on when the driver
> is probed: then we don't really know what the current
> ratio is and all light intensity settings will be off
> relative to what it was at boot.
> 
> To fix this, bring up the backlight OFF then move it to
> the default backlight from there so we know the state.
> 
> Signed-off-by: Linus Walleij <linus.walleij at linaro.org>

Hmnnn... horid, since the backlight will flicker during boot,
but I recall that this bit of hardware is pretty horid anyway
so it is not easily avoided.

Therefore, slightly grudgingly,
Reviewed-by: Daniel Thompson <daniel.thompson at linaro.org>


Daniel.