Miquel Raynal <miquel.raynal@xxxxxxxxxxx> writes:
> Armada 7040-db USB ports deliver 500mA by default while they
> could deliver up to 900mA (usually, for USB3 devices).
>
> The board embeds a GPIO controlled regulator on each port which can be
> configured to deliver each amount of current.
>
> Add a vin-supply property to the USB3 Vbus nodes for this purpose. The
> regulator will be automatically 'enabled', ie. set to limit at 900mA
> instead of 500mA.
>
> Suggested-by: Alex Leibovich <alexl@xxxxxxxxxxx>
> Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Applied on mvebu/dt64
Thanks,
Gregory
> ---
> .../arm64/boot/dts/marvell/armada-7040-db.dts | 28 +++++++++++++++++++
> 1 file changed, 28 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/marvell/armada-7040-db.dts b/arch/arm64/boot/dts/marvell/armada-7040-db.dts
> index d20d84ce7ca8..f34ee87a0f56 100644
> --- a/arch/arm64/boot/dts/marvell/armada-7040-db.dts
> +++ b/arch/arm64/boot/dts/marvell/armada-7040-db.dts
> @@ -28,6 +28,32 @@
> ethernet2 = &cp0_eth2;
> };
>
> + cp0_exp_usb3_0_current_regulator: gpio-regulator {
> + compatible = "regulator-gpio";
> + regulator-name = "cp0-usb3-0-current-regulator";
> + regulator-type = "current";
> + regulator-min-microamp = <500000>;
> + regulator-max-microamp = <900000>;
> + gpios = <&expander0 4 GPIO_ACTIVE_HIGH>;
> + states = <500000 0x0
> + 900000 0x1>;
> + enable-active-high;
> + gpios-states = <0>;
> + };
> +
> + cp0_exp_usb3_1_current_regulator: gpio-regulator {
> + compatible = "regulator-gpio";
> + regulator-name = "cp0-usb3-1-current-regulator";
> + regulator-type = "current";
> + regulator-min-microamp = <500000>;
> + regulator-max-microamp = <900000>;
> + gpios = <&expander0 5 GPIO_ACTIVE_HIGH>;
> + states = <500000 0x0
> + 900000 0x1>;
> + enable-active-high;
> + gpios-states = <0>;
> + };
> +
> cp0_reg_usb3_0_vbus: cp0-usb3-0-vbus {
> compatible = "regulator-fixed";
> regulator-name = "usb3h0-vbus";
> @@ -35,6 +61,7 @@
> regulator-max-microvolt = <5000000>;
> enable-active-high;
> gpio = <&expander0 0 GPIO_ACTIVE_HIGH>;
> + vin-supply = <&cp0_exp_usb3_0_current_regulator>;
> };
>
> cp0_reg_usb3_1_vbus: cp0-usb3-1-vbus {
> @@ -44,6 +71,7 @@
> regulator-max-microvolt = <5000000>;
> enable-active-high;
> gpio = <&expander0 1 GPIO_ACTIVE_HIGH>;
> + vin-supply = <&cp0_exp_usb3_1_current_regulator>;
> };
>
> cp0_usb3_0_phy: cp0-usb3-0-phy {
> --
> 2.19.1
>
>
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--
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com
