cpufreq: sun50i: add a100 cpufreq support

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>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Parthiban Nallathambi <parthiban@linumiz.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
index 18942bfe9c95f76b0ad3ccd8145e543d0bb5a3f8..2a3e8bd317c9d25b90a4554462d7c5d892981b89 100644 (file)
--- a/drivers/cpufreq/cpufreq-dt-platdev.c
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c
@@ -103,6 +103,7 @@ static const struct of_device_id allowlist[] __initconst = {
  * platforms using "operating-points-v2" property.
  */
 static const struct of_device_id blocklist[] __initconst = {
+       { .compatible = "allwinner,sun50i-a100" },
        { .compatible = "allwinner,sun50i-h6", },
        { .compatible = "allwinner,sun50i-h616", },
        { .compatible = "allwinner,sun50i-h618", },

diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
index 293921acec93781f20f48f19666d4bab435d9b58..3a29c026d364366d2d441f137eb088dad07e3301 100644 (file)
--- 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" },