cpufreq: ti-cpufreq: Add support for AM625

Add support for TI K3 AM625 SoC to read speed and revision values from
hardware and pass to OPP layer.
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Vibhore Vardhan <vibhore@ti.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

drivers/cpufreq/ti-cpufreq.c

@@ -39,6 +39,14 @@
 #define OMAP34xx_ProdID_SKUID			0x4830A20C
 #define OMAP3_SYSCON_BASE	(0x48000000 + 0x2000 + 0x270)
 
+#define AM625_EFUSE_K_MPU_OPP			11
+#define AM625_EFUSE_S_MPU_OPP			19
+#define AM625_EFUSE_T_MPU_OPP			20
+
+#define AM625_SUPPORT_K_MPU_OPP			BIT(0)
+#define AM625_SUPPORT_S_MPU_OPP			BIT(1)
+#define AM625_SUPPORT_T_MPU_OPP			BIT(2)
+
 #define VERSION_COUNT				2
 
 struct ti_cpufreq_data;
@@ -104,6 +112,25 @@ static unsigned long omap3_efuse_xlate(struct ti_cpufreq_data *opp_data,
 	return BIT(efuse);
 }
 
+static unsigned long am625_efuse_xlate(struct ti_cpufreq_data *opp_data,
+				       unsigned long efuse)
+{
+	unsigned long calculated_efuse = AM625_SUPPORT_K_MPU_OPP;
+
+	switch (efuse) {
+	case AM625_EFUSE_T_MPU_OPP:
+		calculated_efuse |= AM625_SUPPORT_T_MPU_OPP;
+		fallthrough;
+	case AM625_EFUSE_S_MPU_OPP:
+		calculated_efuse |= AM625_SUPPORT_S_MPU_OPP;
+		fallthrough;
+	case AM625_EFUSE_K_MPU_OPP:
+		calculated_efuse |= AM625_SUPPORT_K_MPU_OPP;
+	}
+
+	return calculated_efuse;
+}
+
 static struct ti_cpufreq_soc_data am3x_soc_data = {
 	.efuse_xlate = amx3_efuse_xlate,
 	.efuse_fallback = AM33XX_800M_ARM_MPU_MAX_FREQ,
@@ -198,6 +225,14 @@ static struct ti_cpufreq_soc_data am3517_soc_data = {
 	.multi_regulator = false,
 };
 
+static struct ti_cpufreq_soc_data am625_soc_data = {
+	.efuse_xlate = am625_efuse_xlate,
+	.efuse_offset = 0x0018,
+	.efuse_mask = 0x07c0,
+	.efuse_shift = 0x6,
+	.rev_offset = 0x0014,
+	.multi_regulator = false,
+};
 
 /**
  * ti_cpufreq_get_efuse() - Parse and return efuse value present on SoC
@@ -301,6 +336,7 @@ static const struct of_device_id ti_cpufreq_of_match[] = {
 	{ .compatible = "ti,dra7", .data = &dra7_soc_data },
 	{ .compatible = "ti,omap34xx", .data = &omap34xx_soc_data, },
 	{ .compatible = "ti,omap36xx", .data = &omap36xx_soc_data, },
+	{ .compatible = "ti,am625", .data = &am625_soc_data, },
 	/* legacy */
 	{ .compatible = "ti,omap3430", .data = &omap34xx_soc_data, },
 	{ .compatible = "ti,omap3630", .data = &omap36xx_soc_data, },