linux-kernel - [PATCH v2 1/5] thermal: stm32: remove hardware irq handler

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Date:   Mon, 4 Nov 2019 14:30:16 +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 v2 1/5] thermal: stm32: remove hardware irq handler

Remove hardware irq handler because it is not needed to disable the
interrupt before the threaded handler. The goal is to simplify
the code.

Change-Id: Ida967e8543c8dafc6a24508000f64f6405add31d
---
 drivers/thermal/st/stm_thermal.c | 25 +------------------------
 1 file changed, 1 insertion(+), 24 deletions(-)

diff --git a/drivers/thermal/st/stm_thermal.c b/drivers/thermal/st/stm_thermal.c
index cf9ddc52f30e..31aa63fb3db1 100644
--- a/drivers/thermal/st/stm_thermal.c
+++ b/drivers/thermal/st/stm_thermal.c
@@ -98,21 +98,10 @@ struct stm_thermal_sensor {
 	unsigned int low_temp_enabled;
 	int num_trips;
 	int irq;
-	unsigned int irq_enabled;
 	void __iomem *base;
 	int t0, fmt0, ramp_coeff;
 };
 
-static irqreturn_t stm_thermal_alarm_irq(int irq, void *sdata)
-{
-	struct stm_thermal_sensor *sensor = sdata;
-
-	disable_irq_nosync(irq);
-	sensor->irq_enabled = false;
-
-	return IRQ_WAKE_THREAD;
-}
-
 static irqreturn_t stm_thermal_alarm_irq_thread(int irq, void *sdata)
 {
 	u32 value;
@@ -464,16 +453,6 @@ static int stm_thermal_get_temp(void *data, int *temp)
 			if (ret)
 				return ret;
 		}
-
-		/*
-		 * Re-enable alarm IRQ if temperature below critical
-		 * temperature
-		 */
-		if (!sensor->irq_enabled &&
-		    (celsius(*temp) < sensor->temp_critical)) {
-			sensor->irq_enabled = true;
-			enable_irq(sensor->irq);
-		}
 	}
 
 	return 0;
@@ -493,7 +472,7 @@ static int stm_register_irq(struct stm_thermal_sensor *sensor)
 	}
 
 	ret = devm_request_threaded_irq(dev, sensor->irq,
-					stm_thermal_alarm_irq,
+					NULL,
 					stm_thermal_alarm_irq_thread,
 					IRQF_ONESHOT,
 					dev->driver->name, sensor);
@@ -503,8 +482,6 @@ static int stm_register_irq(struct stm_thermal_sensor *sensor)
 		return ret;
 	}
 
-	sensor->irq_enabled = true;
-
 	dev_dbg(dev, "%s: thermal IRQ registered", __func__);
 
 	return 0;
-- 
2.17.1