[PATCH 3/6] regulator: lp872x: Remove warning about invalid DVS GPIO
broonie at kernel.org
Wed Dec 23 03:58:38 PST 2015
On Wed, Dec 23, 2015 at 12:50:20PM +0100, Paul Kocialkowski wrote:
> Le mercredi 23 décembre 2015 à 11:41 +0000, Mark Brown a écrit :
> > I would expect the driver at least needs to know how the pins or
> > strapped, or otherwise have configuration for ignoring the input on the
> > pins. This just deletes the warnings, it doesn't have any handling for
> > this case that I can see.
> When the DVS GPIO is invalid, lp872x_init_dvs jumps to the
> set_default_dvs_mode label, which instructs the chip not to use the DVS
> pin at all and do it all in software instead (by clearing the
> LP8720_EXT_DVS_M bit in the LP872X_GENERAL_CFG register).
> That is reflected later in the code, when setting the bucks (the DVS pin
> only applies to the bucks) by checking for the LP8720_EXT_DVS_M bit on
> the LP872X_GENERAL_CFG register (in lp872x_select_buck_vout_addr) to
> decide whether to use software or hardware DVS selection.
> As far as I understood, everything goes well when the GPIO is invalid.
So please put this analysis in the changelog so that the changelog
accurately reflects what the change is doing.
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