[PATCH v2 2/3] arm64: dts: renesas: salvator-common: Configure PMIC for DDR Backup Power

Geert Uytterhoeven geert at linux-m68k.org
Mon Mar 26 02:13:54 PDT 2018


Hi Simon,

On Mon, Mar 26, 2018 at 11:06 AM, Simon Horman <horms at verge.net.au> wrote:
> On Fri, Mar 16, 2018 at 03:08:13PM +0300, Sergei Shtylyov wrote:
>> On 03/16/2018 03:00 PM, Geert Uytterhoeven wrote:
>>
>> >>> On Salvator-X(S), all of the DDR0, DDR1, DDR0C, and DDR1C power rails
>> >>> need to be kept powered when backup mode is enabled.  Reflect this in
>> >>> the "rohm,ddr-backup-power" property for the BD9571MWV PMIC node.
>> >>>
>> >>> The accessory power switch (SW23) is a toggle switch, hense specify
>> >>> "rohm,rstbmode-level".
>> >>>
>> >>> Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
>> >>> ---
>> >>> v2:
>> >>>   - Add rohm,rstbmode-level.
>> >>> ---
>> >>>  arch/arm64/boot/dts/renesas/salvator-common.dtsi | 2 ++
>> >>>  1 file changed, 2 insertions(+)
>> >>>
>> >>> diff --git a/arch/arm64/boot/dts/renesas/salvator-common.dtsi b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
>> >>> index 2a7f36abd2dd85c6..80794c38c2669d75 100644
>> >>> --- a/arch/arm64/boot/dts/renesas/salvator-common.dtsi
>> >>> +++ b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
>> >>> @@ -376,6 +376,8 @@
>> >>>               #interrupt-cells = <2>;
>> >>>               gpio-controller;
>> >>>               #gpio-cells = <2>;
>> >>> +             rohm,ddr-backup-power = <15>;
>> >>
>> >>   Why not 0xf if those are all bit flags?
>> >
>> > Because it's a small number?
>> > Does it matter?
>>
>>    I think hex is preferable for the bit flags. Decimal makes one think it's something
>> else -- some magnitude, etc...
>
> Geert, it seems that Rob Herring is of the same opinion.
> Would you care to respin this series?

Sure, after the respun driver series has been accepted.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds



More information about the linux-arm-kernel mailing list