Re: [PATCH V1 2/5] backlight: qcom-wled: Add support for WLED4 peripheral

[Bjorn Andersson]

On Tue 08 May 03:25 PDT 2018, kgunda@xxxxxxxxxxxxxx wrote:

> On 2018-05-07 21:50, Bjorn Andersson wrote:
> > On Thu 03 May 02:57 PDT 2018, Kiran Gunda wrote:
[..]
> > > +- qcom,ovp
> > > +	Usage:        optional
> > > +	Value type:   <u32>
> > > +	Definition:   mV; Over-voltage protection limit;
> > 
> > The existing users of qcom,pm8941-wled depends on this being in V, so
> > you can't change the unit. I suggest that you add a new "qcom,ovp-mv"
> > property and make the driver fall back to looking for qcom,ovp if that
> > isn't specified.
> > 
> > PS. This is a very good example of why it is a good idea to not
> > restructure and make changes at the same time - I almost missed this.
> > 
> Actually I have checked the current kernel and none of the properties are
> being configured from the device tree node. Hence, i thought it is the right
> time modify the units to mV to support the PMI8998.
> 

arch/arm/boot/dts/qcom-msm8974-sony-xperia-honami.dts does.

> You still want to have the qcom,ovp-mv, even though it is not being
> configured from device tree ?

Yes, please.

> > > +		      For pm8941:  one of 27000, 29000, 32000, 35000
> > > +				  Default: 29000 mV
> > > +		      For pmi8998: one of 18100, 19600, 29600, 31100
> > > +				  Default: 29600 mV
> > > +

Regards,
Bjorn