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soc: rockchip: cpuinfo: Add rockchip_set_spec_sn

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Parse 'spec-sn' as rockchip_soc_id bit[7:0].

e.g.

cpuinfo {
	compatible = "rockchip,cpuinfo";
	nvmem-cells = <&otp_id>, <&cpu_version>, <&cpu_code>, <&specification_serial_number>;
	nvmem-cell-names = "id", "cpu-version", "cpu-code", "spec-sn";
};

* bit[7~0]: 0x1 ~ 0x1a --- A ~ Z

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Change-Id: Ic1d3d384343f4bde0e65c7826260d5dcc5149e80
This commit is contained in:
Sugar Zhang
2025-09-01 11:56:06 +08:00
parent 4827685ea8
commit 50947fe0d6
2 changed files with 42 additions and 0 deletions
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41
drivers/soc/rockchip/rockchip-cpuinfo.c
View File

@@ -65,6 +65,45 @@ static int rk3566_soc_init(struct device *dev)
return 0;
}
static int rockchip_set_spec_sn(struct device *dev)
{
struct nvmem_cell *cell;
u8 *val;
cell = nvmem_cell_get(dev, "spec-sn1");
if (!IS_ERR(cell)) {
val = nvmem_cell_read(cell, NULL);
nvmem_cell_put(cell);
if (IS_ERR(val))
return PTR_ERR(val);
if (*val) {
rockchip_soc_id &= ~ROCKCHIP_SOC_SSN_MASK;
rockchip_soc_id |= *val;
kfree(val);
return 0;
}
kfree(val);
}
cell = nvmem_cell_get(dev, "spec-sn");
if (!IS_ERR(cell)) {
val = nvmem_cell_read(cell, NULL);
nvmem_cell_put(cell);
if (IS_ERR(val))
return PTR_ERR(val);
rockchip_soc_id &= ~ROCKCHIP_SOC_SSN_MASK;
rockchip_soc_id |= *val;
kfree(val);
}
return 0;
}
static int rockchip_cpuinfo_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -80,6 +119,8 @@ static int rockchip_cpuinfo_probe(struct platform_device *pdev)
goto skip_cpu_code;
}
rockchip_set_spec_sn(dev);
cell = nvmem_cell_get(dev, "cpu-code1");
if (!IS_ERR(cell)) {
efuse_buf = nvmem_cell_read(cell, &len);

1
include/linux/rockchip/cpu.h
View File

@@ -248,6 +248,7 @@ static inline bool cpu_is_rk3567(void) { return false; }
static inline bool cpu_is_rk3568(void) { return false; }
#endif
#define ROCKCHIP_SOC_SSN_MASK 0xff
#define ROCKCHIP_SOC_MASK (ROCKCHIP_CPU_MASK | 0xff)
#define ROCKCHIP_SOC_PX30 (ROCKCHIP_CPU_PX30 | 0x00)
#define ROCKCHIP_SOC_PX30S (ROCKCHIP_CPU_PX30 | 0x01)