Hi,
On Sat, Jul 9, 2016 at 4:18 PM, Maxime Ripard
<maxime.ripard@xxxxxxxxxxxxxxxxxx> wrote:
> Hi,
>
> On Wed, Jul 06, 2016 at 05:10:49PM +0800, Chen-Yu Tsai wrote:
>> The Bananapi M1+, like other Allwinner A20 based boards, uses the AXP209
>> PMIC to supply its power. The vendor FEX file's DVFS table suggests the
>> board's CPU power rail has a voltage drop of 25 ~ 50 mV.
>>
>> Add the PMIC regulator nodes and copy the DVFS table from the FEX file.
>>
>> Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx>
>> ---
>> arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts | 48 ++++++++++++++++++++++--
>> 1 file changed, 44 insertions(+), 4 deletions(-)
>>
>> diff --git a/arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts b/arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts
>> index ba5bca0fe997..7bb418bd1b6e 100644
>> --- a/arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts
>> +++ b/arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts
>> @@ -105,6 +105,22 @@
>> status = "okay";
>> };
>>
>> +&cpu0 {
>> + cpu-supply = <®_dcdc2>;
>> +
>> + /* The custom DVFS table suggests a voltage drop of 25 ~ 50 mV */
>> + operating-points = <
>> + /* kHz uV */
>> + 1080000 1450000
>> + 912000 1425000
>> + 864000 1350000
>> + 720000 1250000
>> + 528000 1150000
>> + 312000 1100000
>> + 144000 1050000
>> + >;
>> +};
>> +
>
> We've always tried to not use all the non-sense OPPs coming from the
> FEX files. Have you experienced any issues with the default ones?
I'll find some time to run a stress test on it.
> The other patches have been queued either for 4.8 as fixes, or 4.9.
Thanks!
ChenYu
>
> Thanks!
> Maxime
>
> --
> Maxime Ripard, Free Electrons
> Embedded Linux and Kernel engineering
> http://free-electrons.com
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