PM / OPP: Manage supply's voltage/current in a separate structure

This is a preparatory step for multiple regulator per device support.
Move the voltage/current variables to a new structure.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Dave Gerlach <d-gerlach@ti.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/base/power/opp/core.c

@@ -112,7 +112,7 @@ unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
 	if (IS_ERR_OR_NULL(tmp_opp))
 		pr_err("%s: Invalid parameters\n", __func__);
 	else
-		v = tmp_opp->u_volt;
+		v = tmp_opp->supply.u_volt;
 
 	return v;
 }
@@ -246,10 +246,10 @@ unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
 		if (!opp->available)
 			continue;
 
-		if (opp->u_volt_min < min_uV)
-			min_uV = opp->u_volt_min;
-		if (opp->u_volt_max > max_uV)
-			max_uV = opp->u_volt_max;
+		if (opp->supply.u_volt_min < min_uV)
+			min_uV = opp->supply.u_volt_min;
+		if (opp->supply.u_volt_max > max_uV)
+			max_uV = opp->supply.u_volt_max;
 	}
 
 	rcu_read_unlock();
@@ -637,14 +637,14 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
 	if (IS_ERR(old_opp)) {
 		old_u_volt = 0;
 	} else {
-		old_u_volt = old_opp->u_volt;
-		old_u_volt_min = old_opp->u_volt_min;
-		old_u_volt_max = old_opp->u_volt_max;
+		old_u_volt = old_opp->supply.u_volt;
+		old_u_volt_min = old_opp->supply.u_volt_min;
+		old_u_volt_max = old_opp->supply.u_volt_max;
 	}
 
-	u_volt = opp->u_volt;
-	u_volt_min = opp->u_volt_min;
-	u_volt_max = opp->u_volt_max;
+	u_volt = opp->supply.u_volt;
+	u_volt_min = opp->supply.u_volt_min;
+	u_volt_max = opp->supply.u_volt_max;
 
 	reg = opp_table->regulator;
 
@@ -957,10 +957,11 @@ static bool _opp_supported_by_regulators(struct dev_pm_opp *opp,
 	struct regulator *reg = opp_table->regulator;
 
 	if (!IS_ERR(reg) &&
-	    !regulator_is_supported_voltage(reg, opp->u_volt_min,
-					    opp->u_volt_max)) {
+	    !regulator_is_supported_voltage(reg, opp->supply.u_volt_min,
+					    opp->supply.u_volt_max)) {
 		pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n",
-			__func__, opp->u_volt_min, opp->u_volt_max);
+			__func__, opp->supply.u_volt_min,
+			opp->supply.u_volt_max);
 		return false;
 	}
 
@@ -993,11 +994,12 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
 
 		/* Duplicate OPPs */
 		dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n",
-			 __func__, opp->rate, opp->u_volt, opp->available,
-			 new_opp->rate, new_opp->u_volt, new_opp->available);
+			 __func__, opp->rate, opp->supply.u_volt,
+			 opp->available, new_opp->rate, new_opp->supply.u_volt,
+			 new_opp->available);
 
-		return opp->available && new_opp->u_volt == opp->u_volt ?
-			0 : -EEXIST;
+		return opp->available &&
+		       new_opp->supply.u_volt == opp->supply.u_volt ? 0 : -EEXIST;
 	}
 
 	new_opp->opp_table = opp_table;
@@ -1064,9 +1066,9 @@ int _opp_add_v1(struct device *dev, unsigned long freq, long u_volt,
 	/* populate the opp table */
 	new_opp->rate = freq;
 	tol = u_volt * opp_table->voltage_tolerance_v1 / 100;
-	new_opp->u_volt = u_volt;
-	new_opp->u_volt_min = u_volt - tol;
-	new_opp->u_volt_max = u_volt + tol;
+	new_opp->supply.u_volt = u_volt;
+	new_opp->supply.u_volt_min = u_volt - tol;
+	new_opp->supply.u_volt_max = u_volt + tol;
 	new_opp->available = true;
 	new_opp->dynamic = dynamic;
 

drivers/base/power/opp/debugfs.c

@@ -63,16 +63,16 @@ int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
 	if (!debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate))
 		return -ENOMEM;
 
-	if (!debugfs_create_ulong("u_volt_target", S_IRUGO, d, &opp->u_volt))
+	if (!debugfs_create_ulong("u_volt_target", S_IRUGO, d, &opp->supply.u_volt))
 		return -ENOMEM;
 
-	if (!debugfs_create_ulong("u_volt_min", S_IRUGO, d, &opp->u_volt_min))
+	if (!debugfs_create_ulong("u_volt_min", S_IRUGO, d, &opp->supply.u_volt_min))
 		return -ENOMEM;
 
-	if (!debugfs_create_ulong("u_volt_max", S_IRUGO, d, &opp->u_volt_max))
+	if (!debugfs_create_ulong("u_volt_max", S_IRUGO, d, &opp->supply.u_volt_max))
 		return -ENOMEM;
 
-	if (!debugfs_create_ulong("u_amp", S_IRUGO, d, &opp->u_amp))
+	if (!debugfs_create_ulong("u_amp", S_IRUGO, d, &opp->supply.u_amp))
 		return -ENOMEM;
 
 	if (!debugfs_create_ulong("clock_latency_ns", S_IRUGO, d,

drivers/base/power/opp/of.c

@@ -148,14 +148,14 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
 		return -EINVAL;
 	}
 
-	opp->u_volt = microvolt[0];
+	opp->supply.u_volt = microvolt[0];
 
 	if (count == 1) {
-		opp->u_volt_min = opp->u_volt;
-		opp->u_volt_max = opp->u_volt;
+		opp->supply.u_volt_min = opp->supply.u_volt;
+		opp->supply.u_volt_max = opp->supply.u_volt;
 	} else {
-		opp->u_volt_min = microvolt[1];
-		opp->u_volt_max = microvolt[2];
+		opp->supply.u_volt_min = microvolt[1];
+		opp->supply.u_volt_max = microvolt[2];
 	}
 
 	/* Search for "opp-microamp-<name>" */
@@ -173,7 +173,7 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
 	}
 
 	if (prop && !of_property_read_u32(opp->np, name, &val))
-		opp->u_amp = val;
+		opp->supply.u_amp = val;
 
 	return 0;
 }
@@ -303,9 +303,9 @@ static int _opp_add_static_v2(struct device *dev, struct device_node *np)
 	mutex_unlock(&opp_table_lock);
 
 	pr_debug("%s: turbo:%d rate:%lu uv:%lu uvmin:%lu uvmax:%lu latency:%lu\n",
-		 __func__, new_opp->turbo, new_opp->rate, new_opp->u_volt,
-		 new_opp->u_volt_min, new_opp->u_volt_max,
-		 new_opp->clock_latency_ns);
+		 __func__, new_opp->turbo, new_opp->rate,
+		 new_opp->supply.u_volt, new_opp->supply.u_volt_min,
+		 new_opp->supply.u_volt_max, new_opp->clock_latency_ns);
 
 	/*
 	 * Notify the changes in the availability of the operable

drivers/base/power/opp/opp.h

@@ -61,10 +61,7 @@ extern struct list_head opp_tables;
  * @turbo:	true if turbo (boost) OPP
  * @suspend:	true if suspend OPP
  * @rate:	Frequency in hertz
- * @u_volt:	Target voltage in microvolts corresponding to this OPP
- * @u_volt_min:	Minimum voltage in microvolts corresponding to this OPP
- * @u_volt_max:	Maximum voltage in microvolts corresponding to this OPP
- * @u_amp:	Maximum current drawn by the device in microamperes
+ * @supply:	Power supply voltage/current values
  * @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's
  *		frequency from any other OPP's frequency.
  * @opp_table:	points back to the opp_table struct this opp belongs to
@@ -83,10 +80,8 @@ struct dev_pm_opp {
 	bool suspend;
 	unsigned long rate;
 
-	unsigned long u_volt;
-	unsigned long u_volt_min;
-	unsigned long u_volt_max;
-	unsigned long u_amp;
+	struct dev_pm_opp_supply supply;
+
 	unsigned long clock_latency_ns;
 
 	struct opp_table *opp_table;

include/linux/pm_opp.h

@@ -25,6 +25,22 @@ enum dev_pm_opp_event {
 	OPP_EVENT_ADD, OPP_EVENT_REMOVE, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
 };
 
+/**
+ * struct dev_pm_opp_supply - Power supply voltage/current values
+ * @u_volt:	Target voltage in microvolts corresponding to this OPP
+ * @u_volt_min:	Minimum voltage in microvolts corresponding to this OPP
+ * @u_volt_max:	Maximum voltage in microvolts corresponding to this OPP
+ * @u_amp:	Maximum current drawn by the device in microamperes
+ *
+ * This structure stores the voltage/current values for a single power supply.
+ */
+struct dev_pm_opp_supply {
+	unsigned long u_volt;
+	unsigned long u_volt_min;
+	unsigned long u_volt_max;
+	unsigned long u_amp;
+};
+
 #if defined(CONFIG_PM_OPP)
 
 unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);