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rockchip: rk3576: Implement checkboard() to print SoC variant

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Implement checkboard() to print current SoC model used by a board when
U-Boot proper is running.

  U-Boot 2025.04 (Apr 22 2025 - 20:43:17 +0000)

  Model: Generic RK3576
  SoC:   RK3576
  DRAM:  8 GiB

Information about the SoC model and variant is read from OTP.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Jonas Karlman 2025-08-01 20:32:40 +00:00 committed by Kever Yang
parent 108d9f11ea
commit a72e8feaca
1 changed files with 48 additions and 0 deletions
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48
arch/arm/mach-rockchip/rk3576/rk3576.c
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@ -3,6 +3,10 @@
* Copyright (c) 2024 Rockchip Electronics Co., Ltd
*/
#define LOG_CATEGORY LOGC_ARCH
#include <dm.h>
#include <misc.h>
#include <asm/armv8/mmu.h>
#include <asm/arch-rockchip/bootrom.h>
#include <asm/arch-rockchip/hardware.h>
@ -153,3 +157,47 @@ int arch_cpu_init(void)
return 0;
}
#define RK3576_OTP_CPU_CODE_OFFSET 0x02
#define RK3576_OTP_SPECIFICATION_OFFSET 0x08
int checkboard(void)
{
u8 cpu_code[2], specification;
struct udevice *dev;
char suffix[2];
int ret;
if (!IS_ENABLED(CONFIG_ROCKCHIP_OTP) || !CONFIG_IS_ENABLED(MISC))
return 0;
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_DRIVER_GET(rockchip_otp), &dev);
if (ret) {
log_debug("Could not find otp device, ret=%d\n", ret);
return 0;
}
/* cpu-code: SoC model, e.g. 0x35 0x76 */
ret = misc_read(dev, RK3576_OTP_CPU_CODE_OFFSET, cpu_code, 2);
if (ret < 0) {
log_debug("Could not read cpu-code, ret=%d\n", ret);
return 0;
}
/* specification: SoC variant, e.g. 0xA for RK3576J */
ret = misc_read(dev, RK3576_OTP_SPECIFICATION_OFFSET, &specification, 1);
if (ret < 0) {
log_debug("Could not read specification, ret=%d\n", ret);
return 0;
}
specification &= 0x1f;
/* for RK3576J i.e. '@' + 0xA = 'J' */
suffix[0] = specification > 1 ? '@' + specification : '\0';
suffix[1] = '\0';
printf("SoC: RK%02x%02x%s\n", cpu_code[0], cpu_code[1], suffix);
return 0;
}