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>
---
.../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
