[PATCH 05/12] rockchip: puma-rk3399: load environment from same MMC as used for loading U-Boot proper

[Quentin Schulz <foss+uboot@0leil.net>]

From: Quentin Schulz <quentin.schulz@theobroma-systems.com>

Automatically detect which MMC device (SD-Card or eMMC) was used to load
U-Boot proper and load the environment from that MMC device instead of
a hardcoded one.

Cc: Quentin Schulz <foss+uboot@0leil.net>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
---

Depends on
https://lore.kernel.org/u-boot/20220715151552.953654-1-foss+uboot@0leil.net/

 .../puma_rk3399/puma-rk3399.c                 | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/board/theobroma-systems/puma_rk3399/puma-rk3399.c b/board/theobroma-systems/puma_rk3399/puma-rk3399.c
index ce3436b770..5e5e58c88e 100644
--- a/board/theobroma-systems/puma_rk3399/puma-rk3399.c
+++ b/board/theobroma-systems/puma_rk3399/puma-rk3399.c
@@ -113,6 +113,28 @@ static int setup_boottargets(void)
 	return 0;
 }
 
+int mmc_get_env_dev(void)
+{
+	const char *boot_device =
+		ofnode_read_chosen_string("u-boot,spl-boot-device");
+
+	if (!boot_device) {
+		debug("%s: /chosen/u-boot,spl-boot-device not set\n",
+		      __func__);
+		return CONFIG_SYS_MMC_ENV_DEV;
+	}
+
+	debug("%s: booted from %s\n", __func__, boot_device);
+
+	if (!strcmp(boot_device, "/mmc@fe320000"))
+		return 1;
+
+	if (!strcmp(boot_device, "/mmc@fe330000"))
+		return 0;
+
+	return CONFIG_SYS_MMC_ENV_DEV;
+}
+
 int misc_init_r(void)
 {
 	const u32 cpuid_offset = 0x7;
-- 
2.37.1