thermal: tegra: Introduce struct trip_temps for critical and hot trips

Introduce a helper structure, struct trip_temps, for storing the
temperatures of the critical and hot trip points.

This helps to make the code in tegra_tsensor_get_hw_channel_trips()
somewhat cleaner and will be useful subsequently in eliminating
iteration over trip indices from the driver.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <[email protected]>
Reviewed-by: Lukasz Luba <[email protected]>
Link: https://patch.msgid.link/[email protected]

1 files changed, 20 insertions, 14 deletions

diff --git a/drivers/thermal/tegra/tegra30-tsensor.c b/drivers/thermal/tegra/tegra30-tsensor.c
index d911fa60f100..de50f4618265 100644
--- a/drivers/thermal/tegra/tegra30-tsensor.c
+++ b/drivers/thermal/tegra/tegra30-tsensor.c
@@ -303,8 +303,13 @@ stop_channel:
 	return 0;
 }
 
+struct trip_temps {
+	int hot_trip;
+	int crit_trip;
+};
+
 static void tegra_tsensor_get_hw_channel_trips(struct thermal_zone_device *tzd,
-					       int *hot_trip, int *crit_trip)
+					       struct trip_temps *temps)
 {
 	unsigned int i;
 
@@ -312,8 +317,8 @@ static void tegra_tsensor_get_hw_channel_trips(struct thermal_zone_device *tzd,
 	 * 90C is the maximal critical temperature of all Tegra30 SoC variants,
 	 * use it for the default trip if unspecified in a device-tree.
 	 */
-	*hot_trip  = 85000;
-	*crit_trip = 90000;
+	temps->hot_trip  = 85000;
+	temps->crit_trip = 90000;
 
 	for (i = 0; i < thermal_zone_get_num_trips(tzd); i++) {
 
@@ -322,14 +327,14 @@ static void tegra_tsensor_get_hw_channel_trips(struct thermal_zone_device *tzd,
 		thermal_zone_get_trip(tzd, i, &trip);
 
 		if (trip.type == THERMAL_TRIP_HOT)
-			*hot_trip = trip.temperature;
+			temps->hot_trip = trip.temperature;
 
 		if (trip.type == THERMAL_TRIP_CRITICAL)
-			*crit_trip = trip.temperature;
+			temps->crit_trip = trip.temperature;
 	}
 
 	/* clamp hardware trips to the calibration limits */
-	*hot_trip = clamp(*hot_trip, 25000, 90000);
+	temps->hot_trip = clamp(temps->hot_trip, 25000, 90000);
 
 	/*
 	 * Kernel will perform a normal system shut down if it will
@@ -338,7 +343,7 @@ static void tegra_tsensor_get_hw_channel_trips(struct thermal_zone_device *tzd,
 	 * shut down gracefully before sending signal to the Power
 	 * Management controller.
 	 */
-	*crit_trip = clamp(*crit_trip + 5000, 25000, 90000);
+	temps->crit_trip = clamp(temps->crit_trip + 5000, 25000, 90000);
 }
 
 static int tegra_tsensor_enable_hw_channel(const struct tegra_tsensor *ts,
@@ -346,7 +351,8 @@ static int tegra_tsensor_enable_hw_channel(const struct tegra_tsensor *ts,
 {
 	const struct tegra_tsensor_channel *tsc = &ts->ch[id];
 	struct thermal_zone_device *tzd = tsc->tzd;
-	int err, hot_trip = 0, crit_trip = 0;
+	struct trip_temps temps = { 0 };
+	int err;
 	u32 val;
 
 	if (!tzd) {
@@ -357,24 +363,24 @@ static int tegra_tsensor_enable_hw_channel(const struct tegra_tsensor *ts,
 		return 0;
 	}
 
-	tegra_tsensor_get_hw_channel_trips(tzd, &hot_trip, &crit_trip);
+	tegra_tsensor_get_hw_channel_trips(tzd, &temps);
 
 	dev_info_once(ts->dev, "ch%u: PMC emergency shutdown trip set to %dC\n",
-		      id, DIV_ROUND_CLOSEST(crit_trip, 1000));
+		      id, DIV_ROUND_CLOSEST(temps.crit_trip, 1000));
 
-	hot_trip  = tegra_tsensor_temp_to_counter(ts, hot_trip);
-	crit_trip = tegra_tsensor_temp_to_counter(ts, crit_trip);
+	temps.hot_trip  = tegra_tsensor_temp_to_counter(ts, temps.hot_trip);
+	temps.crit_trip = tegra_tsensor_temp_to_counter(ts, temps.crit_trip);
 
 	/* program LEVEL2 counter threshold */
 	val = readl_relaxed(tsc->regs + TSENSOR_SENSOR0_CONFIG1);
 	val &= ~TSENSOR_SENSOR0_CONFIG1_TH2;
-	val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG1_TH2, hot_trip);
+	val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG1_TH2, temps.hot_trip);
 	writel_relaxed(val, tsc->regs + TSENSOR_SENSOR0_CONFIG1);
 
 	/* program LEVEL3 counter threshold */
 	val = readl_relaxed(tsc->regs + TSENSOR_SENSOR0_CONFIG2);
 	val &= ~TSENSOR_SENSOR0_CONFIG2_TH3;
-	val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG2_TH3, crit_trip);
+	val |= FIELD_PREP(TSENSOR_SENSOR0_CONFIG2_TH3, temps.crit_trip);
 	writel_relaxed(val, tsc->regs + TSENSOR_SENSOR0_CONFIG2);
 
 	/*