[PATCH v6 11/12] ARM: tegra: nexus7: Enable USB OTG mode

Dmitry Osipenko
2021-07-31T17:39:41Z

Nexus 7 has OTG-cable microUSB port, enable OTG mode. USB peripheral
devices now can be connected to Nexus 7 using OTG adapter, switching
USB port into host mode.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
.../tegra30-asus-nexus7-grouper-common.dtsi | 25 +++++++++++++++++--
1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi b/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi
index 4f116c26f6ce..798ac22a50d2 100644
--- a/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi
+++ b/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi
@@ -941,9 +941,29 @@ power_supply: charger@6a {
interrupts = <TEGRA_GPIO(V, 1) IRQ_TYPE_EDGE_BOTH>;

summit,enable-charge-control = <SMB3XX_CHG_ENABLE_PIN_ACTIVE_LOW>;
+ summit,inok-polarity = <SMB3XX_SYSOK_INOK_ACTIVE_LOW>;
summit,enable-usb-charging;

monitored-battery = <&battery_cell>;
+
+ usb_vbus: usb-vbus {
+ regulator-name = "usb_vbus";
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <5000000>;
+ regulator-min-microamp = <750000>;
+ regulator-max-microamp = <750000>;
+
+ /*
+ * SMB347 INOK input pin is connected to PMIC's
+ * ACOK output, which is fixed to ACTIVE_LOW as
+ * long as battery voltage is in a good range.
+ *
+ * Active INOK disables SMB347 output, so polarity
+ * needs to be toggled when we want to get the
+ * output.
+ */
+ summit,needs-inok-toggle;
+ };
};
};

@@ -1017,12 +1037,13 @@ sdmmc4: mmc@78000600 {
usb@7d000000 {
compatible = "nvidia,tegra30-udc";
status = "okay";
- dr_mode = "peripheral";
+ dr_mode = "otg";
+ vbus-supply = <&usb_vbus>;
};

usb-phy@7d000000 {
status = "okay";
- dr_mode = "peripheral";
+ dr_mode = "otg";
nvidia,hssync-start-delay = <0>;
nvidia,xcvr-lsfslew = <2>;
nvidia,xcvr-lsrslew = <2>;
--
2.32.0