Re: [PATCH v2 2/4] mfd: wm5110: Add register patch required for low power sleep

[Lee Jones]

On Mon, 23 Mar 2015, Charles Keepax wrote:

> On Mon, Mar 23, 2015 at 02:13:07PM +0000, Lee Jones wrote:
> > On Tue, 17 Mar 2015, Charles Keepax wrote:
> > 
> > > Some register settings must be applied before the first time low power
> > > sleep mode is entered on the wm5110 to ensure optimium performance.
> > > These settings require SYSCLK to be enabled whilst they are being
> > > applied. This patch applies the settings using the recently factored out
> > > boot time SYSCLK functionality.
> > > 
> > > Signed-off-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
> > > ---
> > >  drivers/mfd/arizona-core.c |   29 +++++++++++++++++++++++++++++
> > >  1 files changed, 29 insertions(+), 0 deletions(-)
> > > 
> > > diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
> > > index ef1f8aa..8f61ccf 100644
> > > --- a/drivers/mfd/arizona-core.c
> > > +++ b/drivers/mfd/arizona-core.c
> > > @@ -344,6 +344,25 @@ static inline int arizona_apply_hardware_patch(struct arizona *arizona)
> > >  	return arizona_exec_with_sysclk(arizona, arizona_hardware_patch_wseq);
> > >  }
> > >  
> > > +static const struct reg_default wm5110_sleep_patch[] = {
> > > +	{ 0x337A, 0xC100 },
> > > +	{ 0x337B, 0x0041 },
> > > +	{ 0x3300, 0xA210 },
> > > +	{ 0x3301, 0x050C },
> > > +};
> > 
> > Really not keen on all these magic numbers.
> > 
> > Would you be kind enough to define them please?
> 
> This is basically just a register patch, its only not included in
> the normal patch due to the constraint on SYSCLK being enabled.
> Its not very normal to add defines for register patch entries and
> often not really practical in terms of IP. I would prefer to
> leave this as is if possible, I am not sure the sort of naming I
> am going to put on it in terms of defines is likely to add much
> more clarity to the situation.

At least supply a nice descriptive comment then please.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org â Open source software for ARM SoCs
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