@@ -29,6 +29,33 @@ struct sunxi_cpufreq_data {
u32 (*efuse_xlate)(u32 *speedbin, size_t len);
};
+static u32 sun20i_efuse_xlate(u32 *speedbin, size_t len)
+{
+ u32 ret, efuse_value = 0;
+ int i;
+
+ for (i = 0; i < len; i++)
+ efuse_value |= ((u32)speedbin[i] << (i * 8));
+
+ switch (efuse_value) {
+ case 0x5e00:
+ /* QFN package */
+ ret = 0;
+ break;
+ case 0x5c00:
+ case 0x7400:
+ /* QFN package */
+ ret = 1;
+ break;
+ case 0x5000:
+ default:
+ /* BGA package */
+ ret = 0;
+ }
+
+ return ret;
+}
+
static u32 sun50i_efuse_xlate(u32 *speedbin, size_t len)
{
u32 efuse_value = 0;
@@ -46,6 +73,10 @@ static u32 sun50i_efuse_xlate(u32 *speedbin, size_t len)
return 0;
}
+struct sunxi_cpufreq_data sun20i_cpufreq_data = {
+ .efuse_xlate = sun20i_efuse_xlate,
+};
+
struct sunxi_cpufreq_data sun50i_cpufreq_data = {
.efuse_xlate = sun50i_efuse_xlate,
};
@@ -54,6 +85,9 @@ static const struct of_device_id cpu_opp_match_list[] = {
{ .compatible = "allwinner,sun50i-h6-operating-points",
.data = &sun50i_cpufreq_data,
},
+ { .compatible = "allwinner,sun20i-d1-operating-points",
+ .data = &sun20i_cpufreq_data,
+ },
{}
};
Adds support for decoding the efuse value read from D1 efuse speed bins, and factors out equivalent code for sun50i. The algorithm is gotten from https://github.com/Tina-Linux/linux-5.4/blob/master/drivers/cpufreq/sun50i-cpufreq-nvmem.c#L293-L338 and maps an efuse value to either 0 or 1, with 1 meaning stable at a lower supply voltage for the same clock frequency. Signed-off-by: Brandon Cheo Fusi <fusibrandon13@gmail.com> --- drivers/cpufreq/sun50i-cpufreq-nvmem.c | 34 ++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)