Hi,
On 22/05/17 19:06, Tony Lindgren wrote:
> Looks like nobody bothered to configure USB host for 37xx-evm
> when we converted things to device tree, so let's add it. This
> is similar to beagleboard configuration with few extra quirks
> to configure the port. And as with beagleboard, OHCI won't work
> because there is no USB LS/FS PHY. A HS USB hub is needed to use
> devices like keyboard and mice.
>
> Cc: Roger Quadros <rogerq@xxxxxx>
> Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
> ---
> arch/arm/boot/dts/omap3-evm-37xx.dts | 82 +++++++++++++++++++++++++++++++++
> arch/arm/boot/dts/omap3-evm-common.dtsi | 33 +++++++++++++
> 2 files changed, 115 insertions(+)
>
> diff --git a/arch/arm/boot/dts/omap3-evm-37xx.dts b/arch/arm/boot/dts/omap3-evm-37xx.dts
> --- a/arch/arm/boot/dts/omap3-evm-37xx.dts
> +++ b/arch/arm/boot/dts/omap3-evm-37xx.dts
> @@ -98,6 +98,32 @@
> >;
> };
>
> + hsusb2_pins: pinmux_hsusb2_pins {
> + pinctrl-single,pins = <
> +
> + /* On-board EHCI USB2 gpmc_nbe1.gpio_61 */
> + OMAP3_CORE1_IOPAD(0x20c8, PIN_OUTPUT | MUX_MODE4)
GPIO_61 looks like nUSB2_EN_1V8 from you comment. This is PHY power related and not hsusb2 related
so it should be in a different group?
> +
> + /* mcspi1_cs3.hsusb2_data2 */
> + OMAP3_CORE1_IOPAD(0x21d4, PIN_INPUT_PULLDOWN | MUX_MODE3)
> +
> + /* mcspi2_clk.hsusb2_data7 */
> + OMAP3_CORE1_IOPAD(0x21d6, PIN_INPUT_PULLDOWN | MUX_MODE3)
> +
> + /* mcspi2_simo.hsusb2_data4 */
> + OMAP3_CORE1_IOPAD(0x21d8, PIN_INPUT_PULLDOWN | MUX_MODE3)
> +
> + /* mcspi2_somi.hsusb2_data5 */
> + OMAP3_CORE1_IOPAD(0x21da, PIN_INPUT_PULLDOWN | MUX_MODE3)
> +
> + /* mcspi2_cs0.hsusb2_data6 */
> + OMAP3_CORE1_IOPAD(0x21dc, PIN_INPUT_PULLDOWN | MUX_MODE3)
> +
> + /* mcspi2_cs1.hsusb2_data3 */
> + OMAP3_CORE1_IOPAD(0x21de, PIN_INPUT_PULLDOWN | MUX_MODE3)
> + >;
> + };
> +
> wl12xx_gpio: pinmux_wl12xx_gpio {
> pinctrl-single,pins = <
> OMAP3_CORE1_IOPAD(0x2180, PIN_OUTPUT | MUX_MODE4) /* uart1_cts.gpio_150 */
> @@ -112,6 +138,37 @@
> };
> };
>
> +&omap3_pmx_core2 {
> + hsusb2_2_pins: pinmux_hsusb2_2_pins {
> + pinctrl-single,pins = <
> +
> + /* EHCI PHY reset GPIO etk_d7.gpio_21 */
> + OMAP3630_CORE2_IOPAD(0x25ea, PIN_OUTPUT | MUX_MODE4)
GPIO_21 is PHY RESET related and not hsusb2 related. Can we have this in a pin group for hsusb2_phy?
Also, hsusb2_pins and hsusb2_2_pins are both related to hsusb2. In omap3-beagle.dts
we don't assign them to any node and they are just setup once at boot by pincltrl default.
> +
> + /* EHCI VBUS etk_d8.gpio_22 */
> + OMAP3630_CORE2_IOPAD(0x25ec, PIN_OUTPUT | MUX_MODE4)
GPIO_21 is PHY power enable so can we have this in a pin group for hsusb2_power?
> +
> + /* etk_d10.hsusb2_clk */
> + OMAP3630_CORE2_IOPAD(0x25f0, PIN_OUTPUT | MUX_MODE3)
> +
> + /* etk_d11.hsusb2_stp */
> + OMAP3630_CORE2_IOPAD(0x25f2, PIN_OUTPUT | MUX_MODE3)
> +
> + /* etk_d12.hsusb2_dir */
> + OMAP3630_CORE2_IOPAD(0x25f4, PIN_INPUT_PULLDOWN | MUX_MODE3)
> +
> + /* etk_d13.hsusb2_nxt */
> + OMAP3630_CORE2_IOPAD(0x25f6, PIN_INPUT_PULLDOWN | MUX_MODE3)
> +
> + /* etk_d14.hsusb2_data0 */
> + OMAP3630_CORE2_IOPAD(0x25f8, PIN_INPUT_PULLDOWN | MUX_MODE3)
> +
> + /* etk_d15.hsusb2_data1 */
> + OMAP3630_CORE2_IOPAD(0x25fa, PIN_INPUT_PULLDOWN | MUX_MODE3)
> + >;
> + };
> +};
> +
> &omap3_pmx_wkup {
> dss_dpi_pins2: pinmux_dss_dpi_pins1 {
> pinctrl-single,pins = <
> @@ -153,6 +210,31 @@
> pinctrl-0 = <&uart3_pins>;
> };
>
> +&hsusb2_power {
> + pinctrl-names = "default";
> + pinctrl-0 = <&hsusb2_pins &hsusb2_2_pins>;
> +};
> +
> +/* GPIO_61 (nUSB2_EN_1V8) low for on-board EHCI USB2 interface */
> +&gpio2 {
> + en_hsusb2_clk {
Is this GPIO_61 enabling 1V8 supply or clk? Node name should be fixed accordingly.
> + gpio-hog;
> + gpios = <29 GPIO_ACTIVE_HIGH>;
Should this be be GPIO_61?
Does this need to be a hog?
> + output-low;
> + line-name = "hsusb2 port";
Can line name be more revealing? e.g. hsusb2 power or hsusb2 clock?
> + };
> +};
> +
> +/* T2_GPIO_2 low to route GPIO_61 to on-board devices */
> +&twl_gpio {
> + en_hsusb2_clk {
> + gpio-hog;
> + gpios = <2 GPIO_ACTIVE_HIGH>;
> + output-low;
> + line-name = "en_hsusb2_clk";
> + };
> +};
> +
> &gpmc {
> ranges = <0 0 0x30000000 0x1000000>, /* CS0: 16MB for NAND */
> <5 0 0x2c000000 0x01000000>;
> diff --git a/arch/arm/boot/dts/omap3-evm-common.dtsi b/arch/arm/boot/dts/omap3-evm-common.dtsi
> --- a/arch/arm/boot/dts/omap3-evm-common.dtsi
> +++ b/arch/arm/boot/dts/omap3-evm-common.dtsi
> @@ -12,6 +12,24 @@
> };
> };
>
> + /* HS USB Port 2 Power */
> + hsusb2_power: hsusb2_power_reg {
> + compatible = "regulator-fixed";
> + regulator-name = "hsusb2_vbus";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + gpio = <&gpio1 22 GPIO_ACTIVE_HIGH>; /* gpio_22 */
> + startup-delay-us = <70000>;
> + enable-active-high;
> + };
> +
> + /* HS USB Host PHY on PORT 2 */
> + hsusb2_phy: hsusb2_phy {
Here we can put the PHY reset related pinmux group.
> + compatible = "usb-nop-xceiv";
> + reset-gpios = <&gpio1 21 GPIO_ACTIVE_LOW>; /* gpio_21 */
> + vcc-supply = <&hsusb2_power>;
> + };
> +
> leds {
> compatible = "gpio-leds";
> ledb {
> @@ -143,6 +161,14 @@
> >;
> };
>
> +&usbhshost {
> + port2-mode = "ehci-phy";
> +};
> +
> +&usbhsehci {
> + phys = <0 &hsusb2_phy>;
> +};
> +
> &usb_otg_hs {
> interface-type = <0>;
> usb-phy = <&usb2_phy>;
> @@ -159,3 +185,10 @@
> reg = <5 0 0xff>;
> };
> };
> +
> +&vaux2 {
> + regulator-name = "usb_1v8";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-always-on> +};
>
--
cheers,
-roger
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