| Message ID | 20210721200832.916644-2-jernej.skrabec@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: dts: allwinner: h6: tanix-tx6: Enable eMMC | expand |
Hi, On Wed, Jul 21, 2021 at 10:08:31PM +0200, Jernej Skrabec wrote: > While there is no publicly available schematic of this board, it's not > hard to determine voltage of GPIO port C, D and G (only ones which can > be set). > > Port C and G are used for MMC/SDIO communication, so they use 1.8 V > power supply. It's not clear if port D is even used, but if it is, it's > pretty safe to assume it uses 3.3 V power supply. Value read from PIO > Group Withstand Voltage Mode Select register from within pre-installed > Android agrees with that assesment. > > Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com> > --- > .../boot/dts/allwinner/sun50i-h6-tanix-tx6.dts | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-tanix-tx6.dts b/arch/arm64/boot/dts/allwinner/sun50i-h6-tanix-tx6.dts > index be81330db14f..a1dd8f472cc8 100644 > --- a/arch/arm64/boot/dts/allwinner/sun50i-h6-tanix-tx6.dts > +++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-tanix-tx6.dts > @@ -32,6 +32,13 @@ hdmi_con_in: endpoint { > }; > }; > > + reg_vcc1v8: vcc1v8 { > + compatible = "regulator-fixed"; > + regulator-name = "vcc1v8"; > + regulator-min-microvolt = <1800000>; > + regulator-max-microvolt = <1800000>; > + }; > + I appreciate that the other 3.3V regulator has the same issue, but the node name must reflect the class of the device. Maybe regulator-vcc1v8? Maxime
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-tanix-tx6.dts b/arch/arm64/boot/dts/allwinner/sun50i-h6-tanix-tx6.dts index be81330db14f..a1dd8f472cc8 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-h6-tanix-tx6.dts +++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-tanix-tx6.dts @@ -32,6 +32,13 @@ hdmi_con_in: endpoint { }; }; + reg_vcc1v8: vcc1v8 { + compatible = "regulator-fixed"; + regulator-name = "vcc1v8"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + }; + reg_vcc3v3: vcc3v3 { compatible = "regulator-fixed"; regulator-name = "vcc3v3"; @@ -99,6 +106,12 @@ &ohci3 { status = "okay"; }; +&pio { + vcc-pc-supply = <®_vcc1v8>; + vcc-pd-supply = <®_vcc3v3>; + vcc-pg-supply = <®_vcc1v8>; +}; + &r_ir { linux,rc-map-name = "rc-tanix-tx5max"; status = "okay";
While there is no publicly available schematic of this board, it's not hard to determine voltage of GPIO port C, D and G (only ones which can be set). Port C and G are used for MMC/SDIO communication, so they use 1.8 V power supply. It's not clear if port D is even used, but if it is, it's pretty safe to assume it uses 3.3 V power supply. Value read from PIO Group Withstand Voltage Mode Select register from within pre-installed Android agrees with that assesment. Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com> --- .../boot/dts/allwinner/sun50i-h6-tanix-tx6.dts | 13 +++++++++++++ 1 file changed, 13 insertions(+)