According to the schematic, the USB0_DP/DM pins are used for
the USB0. According to the AM3517 datasheet,
"This mux selection is controlled by CONTROL_DEVCONF2 register"
The pdata-quirks section sets up this register based on the ti
kernel 3.8 for the am3517-evm.
The device tree section disables the default omap3 and enables
the am3517 variation
RFC:
When we modprobe g_zero to use the OTG port as host, we're still getting errors:
udc-core: couldn't find an available UDC - added [zero] to list of pending drivers
I was hoping someome might have some insight as to what to try.
Signed-off-by: Adam Ford <aford173@xxxxxxxxx>
diff --git a/arch/arm/boot/dts/am3517-evm.dts b/arch/arm/boot/dts/am3517-evm.dts
index 135f38e6f6e2..191f60e4475f 100644
--- a/arch/arm/boot/dts/am3517-evm.dts
+++ b/arch/arm/boot/dts/am3517-evm.dts
@@ -169,6 +169,18 @@
#pwm-cells = <3>;
};
+ usb0_vbus: usb0_vbus {
+ compatible = "regulator-fixed";
+ regulator-name = "usb0_vbus";
+ pinctrl-names = "default";
+ pinctrl-0 = <&otg_drv_vbus>;
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <5000000>;
+ regulator-always-on;
+ startup-delay-us = <70000>;
+ gpio = <&gpio4 29 GPIO_ACTIVE_LOW>; /* gpio_125 */
+ };
+
hsusb1_phy: hsusb1_phy {
compatible = "usb-nop-xceiv";
reset-gpios = <&gpio2 25 GPIO_ACTIVE_LOW>; /* gpio_57 */
@@ -243,6 +255,15 @@
phys = <&hsusb1_phy>;
};
+&usb_otg_hs {
+ status = "disabled";
+};
+
+&am35x_otg_hs {
+ status = "okay";
+ vbus-supply = <&usb0_vbus>;
+};
+
&omap3_pmx_core {
pinctrl-names = "default";
pinctrl-0 = <&hsusb1_reset_pins>;
@@ -305,6 +326,12 @@
>;
};
+ otg_drv_vbus: pinmux_otg_drv_vbus {
+ pinctrl-single,pins = <
+ OMAP3_CORE1_IOPAD(0x2210, PIN_OUTPUT | MUX_MODE4) /* usb0_drvvbus.gpio_125 */
+ >;
+ };
+
hsusb1_reset_pins: pinmux_hsusb1_reset_pins {
pinctrl-single,pins = <
OMAP3_CORE1_IOPAD(0x20ba, PIN_OUTPUT | MUX_MODE4) /* gpmc_ncs6.gpio_57 */
diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c
index 6459816c2879..b3a31fbf793f 100644
--- a/arch/arm/mach-omap2/pdata-quirks.c
+++ b/arch/arm/mach-omap2/pdata-quirks.c
@@ -262,6 +262,17 @@ static void __init omap3_sbc_t3517_legacy_init(void)
static void __init am3517_evm_legacy_init(void)
{
+ unsigned int devconf2;
+ /*
+ * Set up USB clock/mode in the DEVCONF2 register.
+ */
+ devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2);
+ /* USB2.0 PHY reference clock is 13 MHz */
+ devconf2 &= ~(CONF2_REFFREQ | CONF2_OTGMODE | CONF2_PHY_GPIOMODE);
+ devconf2 |= CONF2_REFFREQ_13MHZ | CONF2_SESENDEN | CONF2_VBDTCTEN
+ | CONF2_DATPOL;
+ omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2);
+
am35xx_emac_reset();
}
--
2.17.0
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