linux-kernel - [PATCH_V3 2/6] thermal: stm32: rework sensor mode management

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Date:   Fri, 10 Jan 2020 11:16:01 +0100
From:   Pascal Paillet <p.paillet@...com>
To:     <rui.zhang@...el.com>, <edubezval@...il.com>,
        <daniel.lezcano@...aro.org>, <amit.kucheria@...durent.com>,
        <mcoquelin.stm32@...il.com>, <alexandre.torgue@...com>,
        <p.paillet@...com>, <david.hernandezsanchez@...com>,
        <horms+renesas@...ge.net.au>, <wsa+renesas@...g-engineering.com>,
        <linux-pm@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH_V3 2/6] thermal: stm32: rework sensor mode management

Be sure get_temp returns an error while disabling or enabling the device.
Set THERMAL_DEVICE_ENABLED state at the end of power on function.
Set THERMAL_DEVICE_DISABLED state at the beginning of power off function.

Signed-off-by: Pascal Paillet <p.paillet@...com>
---
 drivers/thermal/st/stm_thermal.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/thermal/st/stm_thermal.c b/drivers/thermal/st/stm_thermal.c
index 7835e109692e..a21fa7e0c72b 100644
--- a/drivers/thermal/st/stm_thermal.c
+++ b/drivers/thermal/st/stm_thermal.c
@@ -160,6 +160,8 @@ static int stm_sensor_power_on(struct stm_thermal_sensor *sensor)
 	writel_relaxed(value, sensor->base +
 		       DTS_CFGR1_OFFSET);
 
+	sensor->mode = THERMAL_DEVICE_ENABLED;
+
 	return 0;
 }
 
@@ -167,6 +169,8 @@ static int stm_sensor_power_off(struct stm_thermal_sensor *sensor)
 {
 	u32 value;
 
+	sensor->mode = THERMAL_DEVICE_DISABLED;
+
 	/* Stop measuring */
 	value = readl_relaxed(sensor->base + DTS_CFGR1_OFFSET);
 	value &= ~TS1_START;
@@ -374,7 +378,6 @@ static int stm_thermal_update_threshold(struct stm_thermal_sensor *sensor)
 {
 	int ret;
 
-	sensor->mode = THERMAL_DEVICE_DISABLED;
 
 	ret = stm_sensor_power_off(sensor);
 	if (ret)
@@ -576,8 +579,6 @@ static int stm_thermal_suspend(struct device *dev)
 	if (ret)
 		return ret;
 
-	sensor->mode = THERMAL_DEVICE_DISABLED;
-
 	return 0;
 }
 
@@ -590,7 +591,6 @@ static int stm_thermal_resume(struct device *dev)
 	if (ret)
 		return ret;
 
-	sensor->mode = THERMAL_DEVICE_ENABLED;
 
 	return 0;
 }
@@ -718,8 +718,6 @@ static int stm_thermal_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_tz;
 
-	sensor->mode = THERMAL_DEVICE_ENABLED;
-
 	dev_info(&pdev->dev, "%s: Driver initialized successfully\n",
 		 __func__);
 
-- 
2.17.1