cpufreq: apple-soc: Allow per-SoC configuration of APPLE_DVFS_CMD_PS1

Support for SoC that has a different APPLE_DVFS_CMD_PS1 will be added soon,
so modify the driver first to allow it to be configured per-SoC.

Signed-off-by: Nick Chan <towinchenmi@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Author: asdfugil

drivers/cpufreq/apple-soc-cpufreq.c

@@ -27,6 +27,7 @@
 #define APPLE_DVFS_CMD_SET		BIT(25)
 #define APPLE_DVFS_CMD_PS2		GENMASK(15, 12)
 #define APPLE_DVFS_CMD_PS1		GENMASK(4, 0)
+#define APPLE_DVFS_CMD_PS1_SHIFT	0
 
 /* Same timebase as CPU counter (24MHz) */
 #define APPLE_DVFS_LAST_CHG_TIME	0x38
@@ -59,6 +60,8 @@ struct apple_soc_cpufreq_info {
 	u64 max_pstate;
 	u64 cur_pstate_mask;
 	u64 cur_pstate_shift;
+	u64 ps1_mask;
+	u64 ps1_shift;
 };
 
 struct apple_cpu_priv {
@@ -74,19 +77,25 @@ static const struct apple_soc_cpufreq_info soc_t8103_info = {
 	.max_pstate = 15,
 	.cur_pstate_mask = APPLE_DVFS_STATUS_CUR_PS_T8103,
 	.cur_pstate_shift = APPLE_DVFS_STATUS_CUR_PS_SHIFT_T8103,
+	.ps1_mask = APPLE_DVFS_CMD_PS1,
+	.ps1_shift = APPLE_DVFS_CMD_PS1_SHIFT,
 };
 
 static const struct apple_soc_cpufreq_info soc_t8112_info = {
 	.has_ps2 = false,
 	.max_pstate = 31,
 	.cur_pstate_mask = APPLE_DVFS_STATUS_CUR_PS_T8112,
 	.cur_pstate_shift = APPLE_DVFS_STATUS_CUR_PS_SHIFT_T8112,
+	.ps1_mask = APPLE_DVFS_CMD_PS1,
+	.ps1_shift = APPLE_DVFS_CMD_PS1_SHIFT,
 };
 
 static const struct apple_soc_cpufreq_info soc_default_info = {
 	.has_ps2 = false,
 	.max_pstate = 15,
 	.cur_pstate_mask = 0, /* fallback */
+	.ps1_mask = APPLE_DVFS_CMD_PS1,
+	.ps1_shift = APPLE_DVFS_CMD_PS1_SHIFT,
 };
 
 static const struct of_device_id apple_soc_cpufreq_of_match[] __maybe_unused = {
@@ -152,8 +161,8 @@ static int apple_soc_cpufreq_set_target(struct cpufreq_policy *policy,
 		return -EIO;
 	}
 
-	reg &= ~APPLE_DVFS_CMD_PS1;
-	reg |= FIELD_PREP(APPLE_DVFS_CMD_PS1, pstate);
+	reg &= ~priv->info->ps1_mask;
+	reg |= pstate << priv->info->ps1_shift;
 	if (priv->info->has_ps2) {
 		reg &= ~APPLE_DVFS_CMD_PS2;
 		reg |= FIELD_PREP(APPLE_DVFS_CMD_PS2, pstate);