ARM: dts: imx51-babbage: Fix ULPI PHY reset modelling

GPIO2_5 is the reset GPIO for the USB3317 ULPI PHY. Instead of modelling it as
a regulator, the correct approach is to use the 'reset_gpios' property of the
"usb-nop-xceiv" node.

GPIO1_7 is the reset GPIO for the USB2517 USB hub. As we currently don't have
dt bindings to describe a HUB reset, let's keep using the regulator approach.

Rename the regulator to 'reg_hub_reset' to better describe its function and bind
it with the USB host1 port instead.

USB host support has been introduced by commit 9bf206a9d13be3 ("ARM: dts:
imx51-babbage: Add USB Host1 support"), which landed in 3.16 and it seems that
USB has only been functional due to previous bootloader initialization.

With this patch applied we can get USB host to work without relying on the
bootloader.

Cc: <stable@vger.kernel.org> # 3.16+
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

diff --git a/arch/arm/boot/dts/imx51-babbage.dts b/arch/arm/boot/dts/imx51-babbage.dts
index 56569cecaa7852795ab94f6046321f13bddd837e..649befeb2cf96ef4b968f809a98d5d718227b002 100644 (file)
--- a/arch/arm/boot/dts/imx51-babbage.dts
+++ b/arch/arm/boot/dts/imx51-babbage.dts
@@ -127,24 +127,12 @@
                #address-cells = <1>;
                #size-cells = <0>;
 
-               reg_usbh1_vbus: regulator@0 {
-                       compatible = "regulator-fixed";
-                       pinctrl-names = "default";
-                       pinctrl-0 = <&pinctrl_usbh1reg>;
-                       reg = <0>;
-                       regulator-name = "usbh1_vbus";
-                       regulator-min-microvolt = <5000000>;
-                       regulator-max-microvolt = <5000000>;
-                       gpio = <&gpio2 5 GPIO_ACTIVE_HIGH>;
-                       enable-active-high;
-               };
-
-               reg_usbotg_vbus: regulator@1 {
+               reg_hub_reset: regulator@0 {
                        compatible = "regulator-fixed";
                        pinctrl-names = "default";
                        pinctrl-0 = <&pinctrl_usbotgreg>;
-                       reg = <1>;
-                       regulator-name = "usbotg_vbus";
+                       reg = <0>;
+                       regulator-name = "hub_reset";
                        regulator-min-microvolt = <5000000>;
                        regulator-max-microvolt = <5000000>;
                        gpio = <&gpio1 7 GPIO_ACTIVE_HIGH>;
@@ -176,6 +164,7 @@
                        reg = <0>;
                        clocks = <&clks IMX5_CLK_DUMMY>;
                        clock-names = "main_clk";
+                       reset-gpios = <&gpio2 5 GPIO_ACTIVE_LOW>;
                };
        };
 };
@@ -419,7 +408,7 @@
 &usbh1 {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_usbh1>;
-       vbus-supply = <&reg_usbh1_vbus>;
+       vbus-supply = <&reg_hub_reset>;
        fsl,usbphy = <&usbh1phy>;
        phy_type = "ulpi";
        status = "okay";
@@ -429,7 +418,6 @@
        dr_mode = "otg";
        disable-over-current;
        phy_type = "utmi_wide";
-       vbus-supply = <&reg_usbotg_vbus>;
        status = "okay";
 };