M28EVK: Enable USB HOST support

This enables the second port, aka. the port with the USB connector on the
M28EVK.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Remy Bohmer <linux@bohmer.net>

board/denx/m28evk/m28evk.c

@@ -52,6 +52,13 @@ int board_early_init_f(void)
 	/* SSP2 clock at 96MHz */
 	mx28_set_sspclk(MXC_SSPCLK2, 96000, 0);
 
+#ifdef	CONFIG_CMD_USB
+	mxs_iomux_setup_pad(MX28_PAD_SSP2_SS1__USB1_OVERCURRENT);
+	mxs_iomux_setup_pad(MX28_PAD_AUART3_TX__GPIO_3_13 |
+			MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP);
+	gpio_direction_output(MX28_PAD_AUART3_TX__GPIO_3_13, 0);
+#endif
+
 	return 0;
 }
 

include/configs/m28evk.h

@@ -75,6 +75,7 @@
 #define	CONFIG_CMD_SETEXPR
 #define	CONFIG_CMD_SF
 #define	CONFIG_CMD_SPI
+#define	CONFIG_CMD_USB
 
 /*
  * Memory configurations
@@ -217,6 +218,17 @@
 #endif
 #endif
 
+/*
+ * USB
+ */
+#ifdef	CONFIG_CMD_USB
+#define	CONFIG_USB_EHCI
+#define	CONFIG_USB_EHCI_MXS
+#define	CONFIG_EHCI_MXS_PORT		1
+#define	CONFIG_EHCI_IS_TDI
+#define	CONFIG_USB_STORAGE
+#endif
+
 /*
  * SPI
  */