[PATCH v4 14/14] ARM: AT91: skov-arm9cpu: support environment on SD-Card

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

barebox is meant to boot from SD-Card on this platform, so support a
barebox environment in this case for easier handling.

Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 arch/arm/boards/skov-arm9cpu/board.c | 8 ++++++++
 arch/arm/dts/at91-skov-arm9cpu.dts   | 6 ++++++
 2 files changed, 14 insertions(+)

diff --git a/arch/arm/boards/skov-arm9cpu/board.c b/arch/arm/boards/skov-arm9cpu/board.c
index db6813c0e726..20507922cb24 100644
--- a/arch/arm/boards/skov-arm9cpu/board.c
+++ b/arch/arm/boards/skov-arm9cpu/board.c
@@ -7,6 +7,7 @@
 #include <envfs.h>
 #include <init.h>
 #include <gpio.h>
+#include <bootsource.h>
 
 #include <linux/sizes.h>
 
@@ -70,6 +71,13 @@ static int skov_arm9_probe(struct device *dev)
 	mem = mem / SZ_1M;
 	globalvar_add_simple_int("board.mem", &mem, "%u");
 
+	/*
+	 * NOR first stage bootloader is at91bootstrap, so if we find traces
+	 * of barebox in on-chip SRAM, it must mean we have booted from SD
+	 */
+	if (is_barebox_arm_head((void *)AT91SAM9263_SRAM0_BASE))
+		bootsource_set_raw(BOOTSOURCE_MMC, BOOTSOURCE_INSTANCE_UNKNOWN);
+
 	return 0;
 }
 
diff --git a/arch/arm/dts/at91-skov-arm9cpu.dts b/arch/arm/dts/at91-skov-arm9cpu.dts
index ac1d5c0c2e6e..d04d031f4053 100644
--- a/arch/arm/dts/at91-skov-arm9cpu.dts
+++ b/arch/arm/dts/at91-skov-arm9cpu.dts
@@ -16,6 +16,12 @@ / {
 
 	chosen {
 		stdout-path = "serial0:115200n8";
+
+		environment-sd {
+			compatible = "barebox,environment";
+			device-path = &mmc1;
+			file-path = "barebox.env";
+		};
 	};
 
 	flash: nor_flash@10000000 {
-- 
2.39.2