arm: mvebu: Add runtime boot-device detection
This patch adds runtime boot-device detection to SPL U-Boot.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Cc: Dirk Eibach <dirk.eibach@gdsys.cc>
Cc: Phil Sutter <phil@nwl.cc>
Cc: Kevin Smith <kevin.smith@elecsyscorp.com>
diff --git a/arch/arm/mach-mvebu/spl.c b/arch/arm/mach-mvebu/spl.c
index 832df0a..778996e 100644
--- a/arch/arm/mach-mvebu/spl.c
+++ b/arch/arm/mach-mvebu/spl.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2014-2015 Stefan Roese <sr@denx.de>
+ * Copyright (C) 2014-2016 Stefan Roese <sr@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
@@ -15,14 +15,30 @@
DECLARE_GLOBAL_DATA_PTR;
-u32 spl_boot_device(void)
+static u32 get_boot_device(void)
{
-#if defined(CONFIG_SPL_SPI_FLASH_SUPPORT)
- return BOOT_DEVICE_SPI;
-#endif
-#if defined(CONFIG_SPL_MMC_SUPPORT)
- return BOOT_DEVICE_MMC1;
+ u32 val;
+ u32 boot_device;
+
+ val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */
+ boot_device = (val & BOOT_DEV_SEL_MASK) >> BOOT_DEV_SEL_OFFS;
+ switch (boot_device) {
+#ifdef CONFIG_SPL_MMC_SUPPORT
+ case BOOT_FROM_MMC:
+ case BOOT_FROM_MMC_ALT:
+ return BOOT_DEVICE_MMC1;
#endif
+ case BOOT_FROM_UART:
+ return BOOT_DEVICE_UART;
+ case BOOT_FROM_SPI:
+ default:
+ return BOOT_DEVICE_SPI;
+ };
+}
+
+u32 spl_boot_device(void)
+{
+ return get_boot_device();
}
#ifdef CONFIG_SPL_MMC_SUPPORT