arm: omap: Detect boot mode very early

ROM stores the boot params information in a known location
and passes it to SPL. This information needs to be copied
very early during boot or else there is a chance of getting
corrupted by SPL. So move this boot device detection very early
during boot.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/arm/mach-omap2/am33xx/board.c

@@ -333,6 +333,14 @@ void early_system_init(void)
 	set_uart_mux_conf();
 	setup_early_clocks();
 	uart_soft_reset();
+#ifdef CONFIG_SPL_BUILD
+	/*
+	 * Save the boot parameters passed from romcode.
+	 * We cannot delay the saving further than this,
+	 * to prevent overwrites.
+	 */
+	save_omap_boot_params();
+#endif
 #ifdef CONFIG_DEBUG_UART_OMAP
 	debug_uart_init();
 #endif

arch/arm/mach-omap2/boot-common.c

@@ -195,13 +195,6 @@ u32 spl_boot_mode(const u32 boot_device)
 
 void spl_board_init(void)
 {
-	/*
-	 * Save the boot parameters passed from romcode.
-	 * We cannot delay the saving further than this,
-	 * to prevent overwrites.
-	 */
-	save_omap_boot_params();
-
 	/* Prepare console output */
 	preloader_console_init();
 

arch/arm/mach-omap2/hwinit-common.c

@@ -158,6 +158,14 @@ void early_system_init(void)
 	do_io_settings();
 #endif
 	setup_early_clocks();
+#ifdef CONFIG_SPL_BUILD
+	/*
+	 * Save the boot parameters passed from romcode.
+	 * We cannot delay the saving further than this,
+	 * to prevent overwrites.
+	 */
+	save_omap_boot_params();
+#endif
 	do_board_detect();
 	vcores_init();
 #ifdef CONFIG_DEBUG_UART_OMAP