rockchip: rk3308: Implement checkboard() to print SoC variant
Implement checkboard() to print current SoC variant used by a board,
e.g. one of:
SoC: RK3308
SoC: RK3308B
SoC: RK3308B-S
when U-Boot proper is running.
U-Boot 2025.01-rc1 (Nov 02 2024 - 20:26:25 +0000)
Model: Radxa ROCK Pi S
SoC: RK3308B
DRAM: 512 MiB (effective 510 MiB)
Information about the SoC variant is read from GRF.
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
diff --git a/arch/arm/mach-rockchip/rk3308/rk3308.c b/arch/arm/mach-rockchip/rk3308/rk3308.c
index c6b1a35..03d97e1 100644
--- a/arch/arm/mach-rockchip/rk3308/rk3308.c
+++ b/arch/arm/mach-rockchip/rk3308/rk3308.c
@@ -216,3 +216,19 @@
return 0;
}
#endif
+
+#define RK3308_GRF_CHIP_ID 0xFF000800
+
+int checkboard(void)
+{
+ u32 chip_id = readl(RK3308_GRF_CHIP_ID);
+
+ if (chip_id == 0x3308)
+ printf("SoC: RK3308B\n");
+ else if (chip_id == 0x3308c)
+ printf("SoC: RK3308B-S\n");
+ else
+ printf("SoC: RK3308\n");
+
+ return 0;
+}