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soc: rockchip: cpuinfo: read cpu version from eFuse

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Change-Id: Ia18ff4e745f09fa04690bb7bc6d95169c389b9d2
Signed-off-by: Liang Chen <cl@rock-chips.com>
This commit is contained in:
Liang Chen 2017-06-01 11:11:11 +08:00 • committed by Huang, Tao
commit 06b2370417
3 changed files with 44 additions and 4 deletions
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3
drivers/soc/rockchip/Kconfig
View file

@ -4,8 +4,9 @@ if ARCH_ROCKCHIP || COMPILE_TEST
# Rockchip Soc drivers
#
config ROCKCHIP_CPUINFO
tristate "Rockchip cpuinfo support"
bool "Rockchip cpuinfo support"
depends on ROCKCHIP_EFUSE && (ARM64 || ARM)
default y
help
Say y here to enable Rockchip cpuinfo support.
Set system_serial_low/high from eFuse ID.

21
drivers/soc/rockchip/rockchip-cpuinfo.c
View file

@ -18,6 +18,10 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <asm/system_info.h>
#include <linux/rockchip/cpu.h>
unsigned long rockchip_soc_id;
EXPORT_SYMBOL(rockchip_soc_id);
static int rockchip_cpuinfo_probe(struct platform_device *pdev)
{
@ -27,6 +31,16 @@ static int rockchip_cpuinfo_probe(struct platform_device *pdev)
size_t len;
int i;
cell = nvmem_cell_get(dev, "cpu-version");
if (!IS_ERR(cell)) {
efuse_buf = nvmem_cell_read(cell, &len);
nvmem_cell_put(cell);
if (len == 1)
rockchip_set_cpu_version(efuse_buf[0]);
kfree(efuse_buf);
}
cell = nvmem_cell_get(dev, "id");
if (IS_ERR(cell)) {
dev_err(dev, "failed to get id cell: %ld\n", PTR_ERR(cell));
@ -72,4 +86,9 @@ static struct platform_driver rockchip_cpuinfo_driver = {
.of_match_table = rockchip_cpuinfo_of_match,
},
};
module_platform_driver(rockchip_cpuinfo_driver);
static int __init rockchip_cpuinfo_init(void)
{
return platform_driver_register(&rockchip_cpuinfo_driver);
}
subsys_initcall_sync(rockchip_cpuinfo_init);

24
include/linux/rockchip/cpu.h
View file

@ -1,6 +1,8 @@
#ifndef __MACH_ROCKCHIP_CPU_H
#define __MACH_ROCKCHIP_CPU_H
#ifdef CONFIG_ROCKCHIP_CPUINFO
extern unsigned long rockchip_soc_id;
static inline bool cpu_is_rockchip(void)
@ -24,6 +26,24 @@ static inline void rockchip_set_cpu_version(unsigned long ver)
(ver << ROCKCHIP_CPU_VERION_SHIFT) & ROCKCHIP_CPU_VERION_MASK;
}
#else
static inline bool cpu_is_rockchip(void)
{
return true;
}
static inline unsigned long rockchip_get_cpu_version(void)
{
return 0;
}
static inline void rockchip_set_cpu_version(unsigned long ver)
{
}
#endif
#define ROCKCHIP_CPU_MASK 0xffff0000
#define ROCKCHIP_CPU_RK2928 0x29280000
#define ROCKCHIP_CPU_RK3026 0x30260000
@ -36,7 +56,7 @@ static inline void rockchip_set_cpu_version(unsigned long ver)
#define ROCKCHIP_CPU_RK3288 0x32880000
#define ROCKCHIP_CPU_RK3228 0x32280000
#ifdef CONFIG_ARM
#ifdef CONFIG_ROCKCHIP_CPUINFO
#define ROCKCHIP_CPU(id, ID) \
static inline bool cpu_is_rk##id(void) \
{ \
@ -80,7 +100,7 @@ ROCKCHIP_CPU(3228, 3228)
#define ROCKCHIP_SOC_RK3288 (ROCKCHIP_CPU_RK3288 | 0x00)
#define ROCKCHIP_SOC_RK3228 (ROCKCHIP_CPU_RK3228 | 0x00)
#ifdef CONFIG_ARM
#ifdef CONFIG_ROCKCHIP_CPUINFO
#define ROCKCHIP_SOC(id, ID) \
static inline bool soc_is_rk##id(void) \
{ \