Am 3. Dezember 2024 10:40:54 MEZ schrieb AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>:
>Il 02/12/24 13:25, Frank Wunderlich ha scritto:
>> From: Frank Wunderlich <frank-w@xxxxxxxxxxxxxxx>
>>
>> Add regulator nodes used for mmc to Bananapi R4 board.
>>
>> Signed-off-by: Frank Wunderlich <frank-w@xxxxxxxxxxxxxxx>
>
>If you're adding the eMMC regulators, I assume that there's an eMMC, or that even
>if there's no device in some version of the board, these two regulators are always
>assigned to the eMMC device - right?
Like BPi-R3 there is one mmc controller mapped to either sd or emmc. I can move the regulators to the dtbo,but then they are defined twice (at least 3v3).
>You should, at this point, do exactly that: you can leave the mmc0 disabled and
>only enable it in a DTBO.
I enable it only in dtbo...
>&mmc0 {
> /* eMMC gets enabled by DTBO if present */
> vmmc-supply = <®_3p3v>;
> vqmmc-supply = <®_1p8v>;
>};
Problem is here that sdcard uses only the 3v3 twice
https://github.com/frank-w/BPI-Router-Linux/blob/6.12-main/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4-sd.dtso
And emmc needs both
https://github.com/frank-w/BPI-Router-Linux/blob/6.12-main/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4-emmc.dtso
Only defining the vmmc-supply in dts and set only the other in dtso is possible but but imho not nice.
>Cheers,
>Angelo
>
>> ---
>> v2:
>> - move mmc regulators to board dts of bpi-r4
>> ---
>> .../dts/mediatek/mt7988a-bananapi-bpi-r4.dts | 18 ++++++++++++++++++
>> 1 file changed, 18 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4.dts b/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4.dts
>> index d914eae2b524..df53512c6890 100644
>> --- a/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4.dts
>> +++ b/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4.dts
>> @@ -8,6 +8,24 @@ / {
>> compatible = "bananapi,bpi-r4", "mediatek,mt7988a";
>> model = "Banana Pi BPI-R4";
>> chassis-type = "embedded";
>> +
>> + reg_1p8v: regulator-1p8v {
>> + compatible = "regulator-fixed";
>> + regulator-name = "fixed-1.8V";
>> + regulator-min-microvolt = <1800000>;
>> + regulator-max-microvolt = <1800000>;
>> + regulator-boot-on;
>> + regulator-always-on;
>> + };
>> +
>> + reg_3p3v: regulator-3p3v {
>> + compatible = "regulator-fixed";
>> + regulator-name = "fixed-3.3V";
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> + regulator-boot-on;
>> + regulator-always-on;
>> + };
>> };
>> &pio {
>
>
regards Frank
