From: Suniel Mahesh <[email protected]> roc-rk3399-pc has an FE1.1 USB 2.0 HUB which connects two USB ports (HOST1 and HOST2). For end devices to work we need to enable USB hub so that HOST detects there presence and enumerates them accordingly. This requires explicit pinctrl within gpio enablement.
Signed-off-by: Suniel Mahesh <[email protected]> Reviewed-by: Kever Yang <[email protected]> --- Note: 1. patch was reviewed, but not committed to mainline 2. tested this on roc-rk3399-pc board version roc-rk3399-pc-v1.1-a 2018-9-25 --- arch/arm/dts/rk3399-roc-pc-u-boot.dtsi | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/arm/dts/rk3399-roc-pc-u-boot.dtsi b/arch/arm/dts/rk3399-roc-pc-u-boot.dtsi index 5746442..598e0e2 100644 --- a/arch/arm/dts/rk3399-roc-pc-u-boot.dtsi +++ b/arch/arm/dts/rk3399-roc-pc-u-boot.dtsi @@ -14,6 +14,16 @@ chosen { u-boot,spl-boot-order = "same-as-spl", &sdhci, &sdmmc; }; + + vcc_hub_en: vcc_hub_en-regulator { + compatible = "regulator-fixed"; + enable-active-high; + gpio = <&gpio2 RK_PA4 GPIO_ACTIVE_HIGH>; + pinctrl-names = "default"; + pinctrl-0 = <&hub_rst>; + regulator-name = "vcc_hub_en"; + regulator-always-on; + }; }; &vdd_log { -- 2.7.4
