fdt: Use device tree to provide SPI switch details

Rather than having the Seaboard SPI/UART switch in CONFIG options in the
header files, use the device tree to configure this

BUG=chromium-os:11623
TEST=build and boot U-Boot on Seaboard

Change-Id: If3b92b685b5fe31a97ef4bc3578a6aa00208d827
Reviewed-on: http://gerrit.chromium.org/gerrit/1661
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>

3 files changed, 22 insertions, 26 deletions

diff --git a/board/nvidia/common/board.c b/board/nvidia/common/board.c
index e68dcfdfeb..679ac3ded3 100644
--- a/board/nvidia/common/board.c
+++ b/board/nvidia/common/board.c
@@ -145,14 +145,15 @@ static void pinmux_init(int uart_ids)
 	pin_mux_uart(uart_ids);
 }
 
-/*
- * Routine: gpio_init
- * Description: Do individual peripheral GPIO configs
+/**
+ * Do individual peripheral GPIO configs
+ *
+ * @param blob	FDT blob with configuration information
  */
-static void gpio_init(void)
+static void gpio_init(const void *blob)
 {
 #ifdef CONFIG_SPI_UART_SWITCH
-	gpio_early_init_uart();
+	gpio_early_init_uart(blob);
 #endif
 }
 
@@ -168,7 +169,7 @@ int board_init(void)
 	gd->bd->bi_arch_number = CONFIG_MACH_TYPE;
 
 #ifdef CONFIG_SPI_UART_SWITCH
-	gpio_config_uart();
+	gpio_config_uart(gd->blob);
 #endif
 #ifdef CONFIG_USB_EHCI_TEGRA
 	board_usb_init();
@@ -204,7 +205,7 @@ int board_early_init_f(void)
 	pinmux_init(uart_ids);
 
 	/* Initialize periph GPIOs */
-	gpio_init();
+	gpio_init(gd->blob);
 
 	return 0;
 }
diff --git a/board/nvidia/common/board.h b/board/nvidia/common/board.h
index 5c23d41b10..c406c89229 100644
--- a/board/nvidia/common/board.h
+++ b/board/nvidia/common/board.h
@@ -25,7 +25,7 @@
 #define _BOARD_H_
 
 void tegra2_start(void);
-void gpio_config_uart(void);
-void gpio_early_init_uart(void);
+void gpio_config_uart(const void *blob);
+void gpio_early_init_uart(const void *blob);
 
 #endif	/* BOARD_H */
diff --git a/board/nvidia/common/uart-spi-fix.c b/board/nvidia/common/uart-spi-fix.c
index 4f022158c4..051f749230 100644
--- a/board/nvidia/common/uart-spi-fix.c
+++ b/board/nvidia/common/uart-spi-fix.c
@@ -24,6 +24,7 @@
 #include <asm/io.h>
 #include <ns16550.h>
 #include <libfdt.h>
+#include <fdt_decode.h>
 #include <fdt_support.h>
 #include <asm/arch/bitfield.h>
 #include <asm/arch/gpio.h>
@@ -41,20 +42,14 @@ enum spi_uart_switch {
 	SWITCH_BOTH
 };
 
-/* Information about the spi/uart switch */
-struct spi_uart {
-	int gpio;			/* GPIO to control switch */
-	NS16550_t regs;			/* Address of UART affected */
-	u32 port;			/* Port number of UART affected */
-};
-
-static struct spi_uart local;
+static struct fdt_spi_uart local;
 static enum spi_uart_switch switch_pos; /* Current switch position */
 
-
-static void get_config(struct spi_uart *config)
+static void get_config(const void *blob, struct fdt_spi_uart *config)
 {
-#if defined CONFIG_SPI_CORRUPTS_UART
+#ifdef CONFIG_OF_CONTROL
+	fdt_decode_get_spi_switch(blob, config);
+#elif defined CONFIG_SPI_CORRUPTS_UART
 	config->gpio = UART_DISABLE_GPIO;
 	config->regs = (NS16550_t)CONFIG_SPI_CORRUPTS_UART;
 	config->port = CONFIG_SPI_CORRUPTS_UART_NR;
@@ -67,11 +62,11 @@ static void get_config(struct spi_uart *config)
  * Init the UART / SPI switch. This can be called before relocation so we must
  * not access BSS.
  */
-void gpio_early_init_uart(void)
+void gpio_early_init_uart(const void *blob)
 {
-	struct spi_uart config;
+	struct fdt_spi_uart config;
 
-	get_config(&config);
+	get_config(blob, &config);
 	if (config.gpio != -1)
 		gpio_direction_output(config.gpio, 0);
 	switch_pos = SWITCH_BOTH;
@@ -80,9 +75,9 @@ void gpio_early_init_uart(void)
 /*
  * Configure the UART / SPI switch.
  */
-void gpio_config_uart(void)
+void gpio_config_uart(const void *blob)
 {
-	get_config(&local);
+	get_config(blob, &local);
 	switch_pos = SWITCH_BOTH;
 	if (local.gpio != -1) {
 		gpio_direction_output(local.gpio, 0);
@@ -92,7 +87,7 @@ void gpio_config_uart(void)
 
 #ifdef CONFIG_SPI_UART_SWITCH
 
-static void spi_uart_switch(struct spi_uart *config,
+static void spi_uart_switch(struct fdt_spi_uart *config,
 			      enum spi_uart_switch new_pos)
 {
 	if (switch_pos == SWITCH_BOTH || new_pos == switch_pos)