mx28evk: add USB support

This patch enables USB host support on the MX28EVK board.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd.eu>
Tested-by: Fabio Estevam <fabio.estevam@freescale.com>

board/freescale/mx28evk/mx28evk.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_AUART2_RX__GPIO_3_8 |
+			MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL);
+	gpio_direction_output(MX28_PAD_AUART2_RX__GPIO_3_8, 1);
+#endif
+
 	return 0;
 }
 

include/configs/mx28evk.h

@@ -64,6 +64,7 @@
 #define CONFIG_CMD_NET
 #define CONFIG_CMD_NFS
 #define CONFIG_CMD_PING
+#define CONFIG_CMD_USB
 
 /*
  * Memory configurations
@@ -157,6 +158,17 @@
 #define	CONFIG_RTC_MXS
 #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
+
 /*
  * Boot Linux
  */