mx23: SPL: Add boot mode support

This adds the boot mode support for i.MX23 processors.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>

arch/arm/cpu/arm926ejs/mxs/spl_boot.c

@@ -51,12 +51,21 @@ void early_delay(int delay)
 
 #define	MUX_CONFIG_BOOTMODE_PAD	(MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL)
 static const iomux_cfg_t iomux_boot[] = {
+#if defined(CONFIG_MX23)
+	MX23_PAD_LCD_D00__GPIO_1_0 | MUX_CONFIG_BOOTMODE_PAD,
+	MX23_PAD_LCD_D01__GPIO_1_1 | MUX_CONFIG_BOOTMODE_PAD,
+	MX23_PAD_LCD_D02__GPIO_1_2 | MUX_CONFIG_BOOTMODE_PAD,
+	MX23_PAD_LCD_D03__GPIO_1_3 | MUX_CONFIG_BOOTMODE_PAD,
+	MX23_PAD_LCD_D04__GPIO_1_4 | MUX_CONFIG_BOOTMODE_PAD,
+	MX23_PAD_LCD_D05__GPIO_1_5 | MUX_CONFIG_BOOTMODE_PAD,
+#elif defined(CONFIG_MX28)
 	MX28_PAD_LCD_D00__GPIO_1_0 | MUX_CONFIG_BOOTMODE_PAD,
 	MX28_PAD_LCD_D01__GPIO_1_1 | MUX_CONFIG_BOOTMODE_PAD,
 	MX28_PAD_LCD_D02__GPIO_1_2 | MUX_CONFIG_BOOTMODE_PAD,
 	MX28_PAD_LCD_D03__GPIO_1_3 | MUX_CONFIG_BOOTMODE_PAD,
 	MX28_PAD_LCD_D04__GPIO_1_4 | MUX_CONFIG_BOOTMODE_PAD,
 	MX28_PAD_LCD_D05__GPIO_1_5 | MUX_CONFIG_BOOTMODE_PAD,
+#endif
 };
 
 static uint8_t mxs_get_bootmode_index(void)
@@ -68,6 +77,21 @@ static uint8_t mxs_get_bootmode_index(void)
 	/* Setup IOMUX of bootmode pads to GPIO */
 	mxs_iomux_setup_multiple_pads(iomux_boot, ARRAY_SIZE(iomux_boot));
 
+#if defined(CONFIG_MX23)
+	/* Setup bootmode pins as GPIO input */
+	gpio_direction_input(MX23_PAD_LCD_D00__GPIO_1_0);
+	gpio_direction_input(MX23_PAD_LCD_D01__GPIO_1_1);
+	gpio_direction_input(MX23_PAD_LCD_D02__GPIO_1_2);
+	gpio_direction_input(MX23_PAD_LCD_D03__GPIO_1_3);
+	gpio_direction_input(MX23_PAD_LCD_D05__GPIO_1_5);
+
+	/* Read bootmode pads */
+	bootmode |= (gpio_get_value(MX23_PAD_LCD_D00__GPIO_1_0) ? 1 : 0) << 0;
+	bootmode |= (gpio_get_value(MX23_PAD_LCD_D01__GPIO_1_1) ? 1 : 0) << 1;
+	bootmode |= (gpio_get_value(MX23_PAD_LCD_D02__GPIO_1_2) ? 1 : 0) << 2;
+	bootmode |= (gpio_get_value(MX23_PAD_LCD_D03__GPIO_1_3) ? 1 : 0) << 3;
+	bootmode |= (gpio_get_value(MX23_PAD_LCD_D05__GPIO_1_5) ? 1 : 0) << 5;
+#elif defined(CONFIG_MX28)
 	/* Setup bootmode pins as GPIO input */
 	gpio_direction_input(MX28_PAD_LCD_D00__GPIO_1_0);
 	gpio_direction_input(MX28_PAD_LCD_D01__GPIO_1_1);
@@ -83,6 +107,7 @@ static uint8_t mxs_get_bootmode_index(void)
 	bootmode |= (gpio_get_value(MX28_PAD_LCD_D03__GPIO_1_3) ? 1 : 0) << 3;
 	bootmode |= (gpio_get_value(MX28_PAD_LCD_D04__GPIO_1_4) ? 1 : 0) << 4;
 	bootmode |= (gpio_get_value(MX28_PAD_LCD_D05__GPIO_1_5) ? 1 : 0) << 5;
+#endif
 
 	for (i = 0; i < ARRAY_SIZE(mxs_boot_modes); i++) {
 		masked = bootmode & mxs_boot_modes[i].boot_mask;