On Odroid U3 (Exynos4412-based) board if USB was initialized by bootloader (in U-Boot "usb start" before tftpboot), the HUB (usb3503) and LAN (smsc95xx) after after successful probing were not visible in the system ("lsusb"). In such case the devices had to be fully reset before configuring. Reset by GPIO (called RESET_N pin) and by RESET field in STCD register in usb3503 HUB are not sufficient. Instead full reset has to be done by disabling and enabling regulator. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx> --- arch/arm/boot/dts/exynos4412-odroid-common.dtsi | 2 +- arch/arm/boot/dts/exynos4412-odroidu3.dts | 6 ++++++ 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi index 14e653e32e0f..efa204a85c83 100644 --- a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi +++ b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi @@ -67,7 +67,7 @@ }; }; - emmc_pwrseq: pwrseq { + emmc_pwrseq: pwrseq1 { pinctrl-0 = <&sd1_cd>; pinctrl-names = "default"; compatible = "mmc-pwrseq-emmc"; diff --git a/arch/arm/boot/dts/exynos4412-odroidu3.dts b/arch/arm/boot/dts/exynos4412-odroidu3.dts index 31cdc036fda4..3da0e6b3c32a 100644 --- a/arch/arm/boot/dts/exynos4412-odroidu3.dts +++ b/arch/arm/boot/dts/exynos4412-odroidu3.dts @@ -41,6 +41,11 @@ cooling-levels = <0 102 170 230>; }; + lan_pwrseq: pwrseq2 { + compatible = "mmc-pwrseq-simple"; + ext-supply = <&buck8_reg>; + }; + thermal-zones { cpu_thermal: cpu-thermal { cooling-maps { @@ -104,6 +109,7 @@ &ehci { port@1 { status = "okay"; + usb-pwrseq = <&lan_pwrseq>; }; port@2 { status = "okay"; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html