| Message ID | 20230120012616.30960-1-andre.przywara@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ARM: dts: sun8i: a83t: bananapi-m3: describe SATA disk regulator | expand |
On 1/19/23 19:26, Andre Przywara wrote: > The Bananapi-M3 has a SATA connector, driven by a USB-to-SATA bridge > soldered on the board. The power for the SATA device is provided by a > GPIO controlled regulator. Since the SATA device is behind USB, it has > no DT node, so we never described this regulator. Instead U-Boot was > turning this on in a rather hackish way, which we now want to get rid of. > On top of that it seems fragile to leave this GPIO undescribed, as > userland could claim it and turn the disk off. > > Add a fixed regulator, controlled by the PD25 GPIO, and mark it as > always-on. This would mimic the current situation, but in a safer way, > and would allow U-Boot to drop the CONFIG_SATAPWR enable hack. > > Signed-off-by: Andre Przywara <andre.przywara@arm.com> Acked-by: Samuel Holland <samuel@sholland.org> > --- > arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts > index 5a7e1bd5f8258..8d56b103f0630 100644 > --- a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts > +++ b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts > @@ -105,6 +105,21 @@ wifi_pwrseq: wifi_pwrseq { > /* enables internal regulator and de-asserts reset */ > reset-gpios = <&r_pio 0 2 GPIO_ACTIVE_LOW>; /* PL2 WL-PMU-EN */ > }; > + > + /* > + * Power supply for the SATA disk, behind a USB-SATA bridge. > + * Since it is a USB device, there is no consumer in the DT, so we > + * have to keep this always on. > + */ > + regulator-sata-disk-pwr { > + compatible = "regulator-fixed"; > + regulator-name = "sata-disk-pwr"; > + regulator-min-microvolt = <5000000>; > + regulator-max-microvolt = <5000000>; > + regulator-always-on; > + enable-active-high; > + gpio = <&pio 3 25 GPIO_ACTIVE_HIGH>; /* PD25 */ > + }; > }; > > &cpu0 {
Dne petek, 20. januar 2023 ob 02:26:16 CET je Andre Przywara napisal(a): > The Bananapi-M3 has a SATA connector, driven by a USB-to-SATA bridge > soldered on the board. The power for the SATA device is provided by a > GPIO controlled regulator. Since the SATA device is behind USB, it has > no DT node, so we never described this regulator. Instead U-Boot was > turning this on in a rather hackish way, which we now want to get rid of. > On top of that it seems fragile to leave this GPIO undescribed, as > userland could claim it and turn the disk off. > > Add a fixed regulator, controlled by the PD25 GPIO, and mark it as > always-on. This would mimic the current situation, but in a safer way, > and would allow U-Boot to drop the CONFIG_SATAPWR enable hack. > > Signed-off-by: Andre Przywara <andre.przywara@arm.com> Applied, thanks! Best regards, Jernej
diff --git a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts index 5a7e1bd5f8258..8d56b103f0630 100644 --- a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts +++ b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts @@ -105,6 +105,21 @@ wifi_pwrseq: wifi_pwrseq { /* enables internal regulator and de-asserts reset */ reset-gpios = <&r_pio 0 2 GPIO_ACTIVE_LOW>; /* PL2 WL-PMU-EN */ }; + + /* + * Power supply for the SATA disk, behind a USB-SATA bridge. + * Since it is a USB device, there is no consumer in the DT, so we + * have to keep this always on. + */ + regulator-sata-disk-pwr { + compatible = "regulator-fixed"; + regulator-name = "sata-disk-pwr"; + regulator-min-microvolt = <5000000>; + regulator-max-microvolt = <5000000>; + regulator-always-on; + enable-active-high; + gpio = <&pio 3 25 GPIO_ACTIVE_HIGH>; /* PD25 */ + }; }; &cpu0 {
The Bananapi-M3 has a SATA connector, driven by a USB-to-SATA bridge soldered on the board. The power for the SATA device is provided by a GPIO controlled regulator. Since the SATA device is behind USB, it has no DT node, so we never described this regulator. Instead U-Boot was turning this on in a rather hackish way, which we now want to get rid of. On top of that it seems fragile to leave this GPIO undescribed, as userland could claim it and turn the disk off. Add a fixed regulator, controlled by the PD25 GPIO, and mark it as always-on. This would mimic the current situation, but in a safer way, and would allow U-Boot to drop the CONFIG_SATAPWR enable hack. Signed-off-by: Andre Przywara <andre.przywara@arm.com> --- arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts | 15 +++++++++++++++ 1 file changed, 15 insertions(+)