[PATCH 12/13] cpufreq: sun50i: add a100 cpufreq support

Cody Eksal
2024-10-24T17:09:49Z

From: Shuosheng Huang <huangshuosheng@allwinnertech.com>

Let's add cpufreq nvmem based for allwinner a100 soc. It's similar to h6,
let us use efuse_xlate to extract the differentiated part.

Signed-off-by: Shuosheng Huang <huangshuosheng@allwinnertech.com>
[masterr3c0rd@epochal.quest: add A100 to opp_match_list]
Signed-off-by: Cody Eksal <masterr3c0rd@epochal.quest>
---
drivers/cpufreq/sun50i-cpufreq-nvmem.c | 28 ++++++++++++++++++++++++++
1 file changed, 28 insertions(+)

diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
index 293921acec93..3a29c026d364 100644
--- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c
+++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
@@ -22,6 +22,9 @@
#define NVMEM_MASK 0x7
#define NVMEM_SHIFT 5

+#define SUN50I_A100_NVMEM_MASK 0xf
+#define SUN50I_A100_NVMEM_SHIFT 12
+
static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev;

struct sunxi_cpufreq_data {
@@ -45,6 +48,23 @@ static u32 sun50i_h6_efuse_xlate(u32 speedbin)
return 0;
}

+static u32 sun50i_a100_efuse_xlate(u32 speedbin)
+{
+ u32 efuse_value;
+
+ efuse_value = (speedbin >> SUN50I_A100_NVMEM_SHIFT) &
+ SUN50I_A100_NVMEM_MASK;
+
+ switch (efuse_value) {
+ case 0b100:
+ return 2;
+ case 0b010:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
static int get_soc_id_revision(void)
{
#ifdef CONFIG_HAVE_ARM_SMCCC_DISCOVERY
@@ -108,6 +128,10 @@ static struct sunxi_cpufreq_data sun50i_h6_cpufreq_data = {
.efuse_xlate = sun50i_h6_efuse_xlate,
};

+static struct sunxi_cpufreq_data sun50i_a100_cpufreq_data = {
+ .efuse_xlate = sun50i_a100_efuse_xlate,
+};
+
static struct sunxi_cpufreq_data sun50i_h616_cpufreq_data = {
.efuse_xlate = sun50i_h616_efuse_xlate,
};
@@ -116,6 +140,9 @@ static const struct of_device_id cpu_opp_match_list[] = {
{ .compatible = "allwinner,sun50i-h6-operating-points",
.data = &sun50i_h6_cpufreq_data,
},
+ { .compatible = "allwinner,sun50i-a100-operating-points",
+ .data = &sun50i_a100_cpufreq_data,
+ },
{ .compatible = "allwinner,sun50i-h616-operating-points",
.data = &sun50i_h616_cpufreq_data,
},
@@ -291,6 +318,7 @@ static struct platform_driver sun50i_cpufreq_driver = {

static const struct of_device_id sun50i_cpufreq_match_list[] = {
{ .compatible = "allwinner,sun50i-h6" },
+ { .compatible = "allwinner,sun50i-a100" },
{ .compatible = "allwinner,sun50i-h616" },
{ .compatible = "allwinner,sun50i-h618" },
{ .compatible = "allwinner,sun50i-h700" },
--
2.47.0