Messages in this thread Patch in this message | | | From | Shuosheng Huang <> | Subject | [PATCH v4 2/6] cpufreq: sun50i: add a100 cpufreq support | Date | Tue, 8 Dec 2020 15:19:53 +0800 |
| |
Add cpufreq nvmem based for allwinner a100 SoC, it's similar to h6.
Signed-off-by: Shuosheng Huang <huangshuosheng@allwinnertech.com> --- drivers/cpufreq/cpufreq-dt-platdev.c | 1 + drivers/cpufreq/sun50i-cpufreq-nvmem.c | 32 ++++++++++++++++++++++++++ 2 files changed, 33 insertions(+)
diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c index 3776d960f405..2ebf5d9cb616 100644 --- a/drivers/cpufreq/cpufreq-dt-platdev.c +++ b/drivers/cpufreq/cpufreq-dt-platdev.c @@ -102,6 +102,7 @@ static const struct of_device_id whitelist[] __initconst = { */ static const struct of_device_id blacklist[] __initconst = { { .compatible = "allwinner,sun50i-h6", }, + { .compatible = "allwinner,sun50i-a100", }, { .compatible = "calxeda,highbank", }, { .compatible = "calxeda,ecx-2000", }, diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c index 3c0531938d1a..aead98164373 100644 --- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c +++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c @@ -22,6 +22,9 @@ #define SUN50I_H6_NVMEM_MASK 0x7 #define SUN50I_H6_NVMEM_SHIFT 5 +#define SUN50I_A100_NVMEM_MASK 0xf +#define SUN50I_A100_NVMEM_SHIFT 12 + struct sunxi_cpufreq_soc_data { int (*efuse_xlate)(struct nvmem_cell *speedbin_nvmem); }; @@ -52,6 +55,30 @@ static int sun50i_h6_efuse_xlate(struct nvmem_cell *speedbin_nvmem) return 0; } +static int sun50i_a100_efuse_xlate(struct nvmem_cell *speedbin_nvmem) +{ + size_t len; + u32 *speedbin; + u32 efuse_value; + + speedbin = nvmem_cell_read(speedbin_nvmem, &len); + if (IS_ERR(speedbin)) + return PTR_ERR(speedbin); + + efuse_value = (*(u16 *)efuse >> SUN50I_A100_NVMEM_SHIFT) & + SUN50I_A100_NVMEM_MASK; + kfree(speedbin); + + switch (efuse_value) { + case 0b100: + return 2; + case 0b010: + return 1; + default: + return 0; + } +} + /** * sun50i_cpufreq_get_efuse() - Determine speed grade from efuse value * @soc_data: pointer to sunxi_cpufreq_soc_data context @@ -184,8 +211,13 @@ static const struct sunxi_cpufreq_soc_data sun50i_h6_data = { .efuse_xlate = sun50i_h6_efuse_xlate, }; +static const struct sunxi_cpufreq_soc_data sun50i_a100_data = { + .efuse_xlate = sun50i_a100_efuse_xlate, +}; + static const struct of_device_id sun50i_cpufreq_match_list[] = { { .compatible = "allwinner,sun50i-h6", .data = &sun50i_h6_data }, + { .compatible = "allwinner,sun50i-a100", .data = &sun50i_a100_data }, {} }; -- 2.28.0
| |