linux-kernel - Re: [PATCH 07/11] ARM: dts: sunxi: Add dtsi file for AXP809 PMIC

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Date:	Sat, 6 Feb 2016 20:42:24 +0800
From:	Chen-Yu Tsai <wens@...e.org>
To:	Mark Brown <broonie@...nel.org>
Cc:	Chen-Yu Tsai <wens@...e.org>, Lee Jones <lee.jones@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	devicetree <devicetree@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH 07/11] ARM: dts: sunxi: Add dtsi file for AXP809 PMIC

On Tue, Feb 2, 2016 at 8:17 PM, Mark Brown <broonie@...nel.org> wrote:
> On Tue, Feb 02, 2016 at 06:27:40PM +0800, Chen-Yu Tsai wrote:
>
>> +             reg_dcdc1: dcdc1 {
>> +                     regulator-name = "dcdc1";
>> +             };
>
> Why is this generic DTS include specifying regulator names?

My intent is to provide better looking names by default.
I just realized I could do this in the driver by replacing
a few fields.

But I still might need to do this for the AXP806, which
is a slave PMIC also used with A80 SoCs. The names overlap
with the AXP809. Allwinner gets around this by adding a
"s_" prefix to them. I suppose that works too.

Mark, may I assume you are OK with this DTS include listing
the regulators, even if their sections are empty?

>
>> +             reg_rtc_ldo: rtc_ldo {
>> +                     /* RTC_LDO is a fixed, always-on regulator */
>> +                     regulator-always-on;
>> +                     regulator-min-microvolt = <1800000>;
>> +                     regulator-max-microvolt = <1800000>;
>
> If the regulator itself is limited in this way there is no need to
> specify this in the DTS.

Will remove.

Thanks
ChenYu