| Message ID | 20230127142221.3718184-2-christianshewitt@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: dts: meson: fix BPI-M5 and add BPI-M2-PRO | expand |
On 27/01/2023 15:22, Christian Hewitt wrote: > For proper warm (re)boot from SD card the BPI-M5 board requires TFLASH_VDD_EN > and VDDIO_C pins to be switched to high impedance mode. This can be achieved > using OPEN_DRAIN instead of ACTIVE_HIGH to leave the GPIO pins in input mode > and retain high state (pin has the pull-up). > > This change is inspired by meson-sm1-odroid.dtsi where OPEN_DRAIN has been > used to resolve similar problems with the Odroid C4 board (TF_IO in the C4 > dts is the equivalent regulator). > > Fixes: 976e920183e4 ("arm64: dts: meson-sm1: add Banana PI BPI-M5 board dts") > Suggested-by: Neil Armstrong <neil.armstrong@linaro.org> > Signed-off-by: Christian Hewitt <christianshewitt@gmail.com> > --- > arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts b/arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts > index 028220ed45ad..3c1267a7ffef 100644 > --- a/arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts > +++ b/arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts > @@ -123,7 +123,7 @@ vddio_c: regulator-vddio_c { > regulator-min-microvolt = <1800000>; > regulator-max-microvolt = <3300000>; > > - enable-gpio = <&gpio_ao GPIOE_2 GPIO_ACTIVE_HIGH>; > + enable-gpio = <&gpio_ao GPIOE_2 GPIO_OPEN_DRAIN>; > enable-active-high; > regulator-always-on; > Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts b/arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts index 028220ed45ad..3c1267a7ffef 100644 --- a/arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts +++ b/arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts @@ -123,7 +123,7 @@ vddio_c: regulator-vddio_c { regulator-min-microvolt = <1800000>; regulator-max-microvolt = <3300000>; - enable-gpio = <&gpio_ao GPIOE_2 GPIO_ACTIVE_HIGH>; + enable-gpio = <&gpio_ao GPIOE_2 GPIO_OPEN_DRAIN>; enable-active-high; regulator-always-on;
For proper warm (re)boot from SD card the BPI-M5 board requires TFLASH_VDD_EN and VDDIO_C pins to be switched to high impedance mode. This can be achieved using OPEN_DRAIN instead of ACTIVE_HIGH to leave the GPIO pins in input mode and retain high state (pin has the pull-up). This change is inspired by meson-sm1-odroid.dtsi where OPEN_DRAIN has been used to resolve similar problems with the Odroid C4 board (TF_IO in the C4 dts is the equivalent regulator). Fixes: 976e920183e4 ("arm64: dts: meson-sm1: add Banana PI BPI-M5 board dts") Suggested-by: Neil Armstrong <neil.armstrong@linaro.org> Signed-off-by: Christian Hewitt <christianshewitt@gmail.com> --- arch/arm64/boot/dts/amlogic/meson-sm1-bananapi-m5.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)