[linux-sunxi] Re: [PATCH 3/6] ARM: sun8i: r40: add 5V regulator for Banana Pi M2 Ultra

[Maxime Ripard]

On Tue, Oct 10, 2017 at 02:25:35AM +0000, Chen-Yu Tsai wrote:
> On Tue, Oct 10, 2017 at 7:25 AM, Icenowy Zheng <icenowy at aosc.io> wrote:
> >
> >
> > 于 2017年10月10日 GMT+08:00 上午5:04:07, Maxime Ripard <maxime.ripard at free-electrons.com> 写到:
> >>On Sun, Oct 08, 2017 at 04:29:03AM +0000, Icenowy Zheng wrote:
> >>> On newer revisions of the Banana Pi M2 Ultra boards, the 5V power
> >>output
> >>> (used by HDMI, SATA and USB) is controller via a GPIO.
> >>>
> >>> Add the regulator node for it.
> >>>
> >>> Older revisions just have the 5V power output always on, and the GPIO
> >>is
> >>> reserved on these boards. So it won't affect the older revisions.
> >>>
> >>> Signed-off-by: Icenowy Zheng <icenowy at aosc.io>
> >>> ---
> >>>  arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dts | 9 +++++++++
> >>>  1 file changed, 9 insertions(+)
> >>>
> >>> diff --git a/arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dts
> >>b/arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dts
> >>> index 7b52608cebe6..035599d870b9 100644
> >>> --- a/arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dts
> >>> +++ b/arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dts
> >>> @@ -78,6 +78,15 @@
> >>>              };
> >>>      };
> >>>
> >>> +    reg_vcc5v0: vcc5v0 {
> >>> +            compatible = "regulator-fixed";
> >>> +            regulator-name = "vcc5v0";
> >>> +            regulator-min-microvolt = <5000000>;
> >>> +            regulator-max-microvolt = <5000000>;
> >>> +            gpio = <&pio 7 23 GPIO_ACTIVE_HIGH>; /* PH23 */
> >>> +            enable-active-high;
> >>
> >>This is redundant with the GPIO flag
> >
> > I remember someone suggested me to add this
> > property (maybe wens). It's said that the driver may not
> > process the GPIO_ACTIVE_HIGH correctly.
> 
> I believe it was me. The fixed regulator driver has not migrated to
> the GPIO descriptor API, and it doesn't look like it cares about the
> GPIO flags.

Maybe we should just migrate it then?

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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