OMAP3: mcx: read hot-water-button after reset

Detect hot-water-button to start a differnt image.

Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Tom Rini <trini@ti.com>

board/htkw/mcx/mcx.c

@@ -37,6 +37,8 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#define HOT_WATER_BUTTON	38
+
 #ifdef CONFIG_USB_EHCI
 static struct omap_usbhs_board_data usbhs_bdata = {
 	.port_mode[0] = OMAP_EHCI_PORT_MODE_PHY,
@@ -68,6 +70,27 @@ int board_init(void)
 	return 0;
 }
 
+#ifdef CONFIG_BOARD_LATE_INIT
+int board_late_init(void)
+{
+	if (gpio_request(HOT_WATER_BUTTON, "hot-water-button") < 0) {
+		puts("Failed to get hot-water-button pin\n");
+		return -ENODEV;
+	}
+	gpio_direction_input(HOT_WATER_BUTTON);
+
+	/*
+	 * if hot-water-button is pressed
+	 * change bootcmd
+	 */
+	if (gpio_get_value(HOT_WATER_BUTTON))
+		return 0;
+
+	setenv("bootcmd", "run swupdate");
+	return 0;
+}
+#endif
+
 /*
  * Routine: set_muxconf_regs
  * Description: Setting up the configuration Mux registers specific to the

include/configs/mcx.h

@@ -30,6 +30,7 @@
 
 #define MACH_TYPE_MCX			3656
 #define CONFIG_MACH_TYPE	MACH_TYPE_MCX
+#define CONFIG_BOARD_LATE_INIT
 
 #define CONFIG_SYS_CACHELINE_SIZE	64
 
@@ -140,6 +141,7 @@
 #define CONFIG_MTD_PARTITIONS
 #define CONFIG_MTD_DEVICE
 #define CONFIG_CMD_MTDPARTS
+#define CONFIG_CMD_GPIO
 
 #undef CONFIG_CMD_FLASH		/* flinfo, erase, protect	*/
 #undef CONFIG_CMD_FPGA		/* FPGA configuration Support	*/