thermal/drivers/db8500: Use driver dev instead of tz->device

The db8500 driver uses the thermal zone device instead of the device
attached to it. In order to prevent the drivers to access the thermal
zone device structure, replace the thermal zone device by the driver
to show the debug message.

Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230307133735.90772-5-daniel.lezcano@linaro.org

drivers/thermal/db8500_thermal.c

@@ -53,6 +53,7 @@ static const unsigned long db8500_thermal_points[] = {
 
 struct db8500_thermal_zone {
 	struct thermal_zone_device *tz;
+	struct device *dev;
 	unsigned long interpolated_temp;
 	unsigned int cur_index;
 };
@@ -114,7 +115,7 @@ static irqreturn_t prcmu_low_irq_handler(int irq, void *irq_data)
 	idx -= 1;
 
 	db8500_thermal_update_config(th, idx, next_low, next_high);
-	dev_dbg(&th->tz->device,
+	dev_dbg(th->dev,
 		"PRCMU set max %ld, min %ld\n", next_high, next_low);
 
 	thermal_zone_device_update(th->tz, THERMAL_EVENT_UNSPECIFIED);
@@ -136,7 +137,7 @@ static irqreturn_t prcmu_high_irq_handler(int irq, void *irq_data)
 
 		db8500_thermal_update_config(th, idx, next_low, next_high);
 
-		dev_dbg(&th->tz->device,
+		dev_dbg(th->dev,
 			"PRCMU set max %ld, min %ld\n", next_high, next_low);
 	} else if (idx == num_points - 1)
 		/* So we roof out 1 degree over the max point */
@@ -157,6 +158,8 @@ static int db8500_thermal_probe(struct platform_device *pdev)
 	if (!th)
 		return -ENOMEM;
 
+	th->dev = dev;
+
 	low_irq = platform_get_irq_byname(pdev, "IRQ_HOTMON_LOW");
 	if (low_irq < 0)
 		return low_irq;