From 8b8b3d6b55b9503adb5340936870b16777aeed04 Mon Sep 17 00:00:00 2001
From: Patrick Delaunay <patrick.delaunay@st.com>
Date: Tue, 30 Jul 2019 19:16:37 +0200
Subject: [PATCH] stm32mp1: board: add environment variable for board id and
board rev
Add variable to identify board with HW id (read from OTP)
and revision.
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
---
board/st/stm32mp1/stm32mp1.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index 279c7b7797..fdc4af3b64 100644
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -539,6 +539,10 @@ int board_late_init(void)
#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
const void *fdt_compat;
int fdt_compat_len;
+ int ret;
+ u32 otp;
+ struct udevice *dev;
+ char buf[10];
fdt_compat = fdt_getprop(gd->fdt_blob, 0, "compatible",
&fdt_compat_len);
@@ -548,6 +552,21 @@ int board_late_init(void)
else
env_set("board_name", fdt_compat + 3);
}
+ ret = uclass_get_device_by_driver(UCLASS_MISC,
+ DM_GET_DRIVER(stm32mp_bsec),
+ &dev);
+
+ if (!ret)
+ ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_BOARD),
+ &otp, sizeof(otp));
+ if (!ret && otp) {
+ snprintf(buf, sizeof(buf), "0x%04x", otp >> 16);
+ env_set("board_id", buf);
+
+ snprintf(buf, sizeof(buf), "0x%04x",
+ ((otp >> 8) & 0xF) - 1 + 0xA);
+ env_set("board_rev", buf);
+ }
#endif
/* for DK1/DK2 boards */
--
2.39.5