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soc: rockchip: cpuinfo: Add support for cpu code parse

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This patch add cpu code parse from otp or efuse.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Change-Id: I550eb01725ba265d5eb47caaf1d0e66656cfb4b0
This commit is contained in:
Sugar Zhang
2020-07-28 15:49:52 +08:00
committed by Tao Huang
parent 1669d97751
commit ffb82a0e28
2 changed files with 28 additions and 5 deletions
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11
drivers/soc/rockchip/rockchip-cpuinfo.c
View File

@@ -32,6 +32,16 @@ static int rockchip_cpuinfo_probe(struct platform_device *pdev)
size_t len;
int i;
cell = nvmem_cell_get(dev, "cpu-code");
if (!IS_ERR(cell)) {
efuse_buf = nvmem_cell_read(cell, &len);
nvmem_cell_put(cell);
if (len == 2)
rockchip_set_cpu((efuse_buf[0] << 8 | efuse_buf[1]));
kfree(efuse_buf);
}
cell = nvmem_cell_get(dev, "cpu-version");
if (!IS_ERR(cell)) {
efuse_buf = nvmem_cell_read(cell, &len);
@@ -68,6 +78,7 @@ static int rockchip_cpuinfo_probe(struct platform_device *pdev)
system_serial_low = crc32(0, buf, 8);
system_serial_high = crc32(system_serial_low, buf + 8, 8);
dev_info(dev, "SoC\t\t: %lx\n", rockchip_soc_id);
dev_info(dev, "Serial\t\t: %08x%08x\n",
system_serial_high, system_serial_low);

22
include/linux/rockchip/cpu.h
View File

@@ -16,6 +16,12 @@
#include <linux/of.h>
#define ROCKCHIP_CPU_MASK 0xffff0000
#define ROCKCHIP_CPU_SHIFT 16
#define ROCKCHIP_CPU_RK312X 0x31260000
#define ROCKCHIP_CPU_RK3288 0x32880000
#define ROCKCHIP_CPU_RK3308 0x33080000
#ifdef CONFIG_ROCKCHIP_CPUINFO
extern unsigned long rockchip_soc_id;
@@ -36,6 +42,14 @@ static inline void rockchip_set_cpu_version(unsigned long ver)
(ver << ROCKCHIP_CPU_VERION_SHIFT) & ROCKCHIP_CPU_VERION_MASK;
}
static inline void rockchip_set_cpu(unsigned long code)
{
if (!code)
return;
rockchip_soc_id &= ~ROCKCHIP_CPU_MASK;
rockchip_soc_id |= (code << ROCKCHIP_CPU_SHIFT) & ROCKCHIP_CPU_MASK;
}
#else
#define rockchip_soc_id 0
@@ -49,13 +63,11 @@ static inline void rockchip_set_cpu_version(unsigned long ver)
{
}
static inline void rockchip_set_cpu(unsigned long code)
{
}
#endif
#define ROCKCHIP_CPU_MASK 0xffff0000
#define ROCKCHIP_CPU_RK312X 0x31260000
#define ROCKCHIP_CPU_RK3288 0x32880000
#define ROCKCHIP_CPU_RK3308 0x33080000
#ifdef CONFIG_CPU_RK312X
static inline bool cpu_is_rk312x(void)
{