linux-kernel - [PATCH v4 07/11] thermal: sun8i: rework for ths irq handler func

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Date:   Sun, 23 Jun 2019 12:42:02 -0400
From:   Yangtao Li <tiny.windzz@...il.com>
To:     rui.zhang@...el.com, edubezval@...il.com,
        daniel.lezcano@...aro.org, robh+dt@...nel.org,
        mark.rutland@....com, maxime.ripard@...tlin.com, wens@...e.org,
        davem@...emloft.net, gregkh@...uxfoundation.org,
        mchehab+samsung@...nel.org, linus.walleij@...aro.org,
        nicolas.ferre@...rochip.com, paulmck@...ux.ibm.com
Cc:     linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Yangtao Li <tiny.windzz@...il.com>
Subject: [PATCH v4 07/11] thermal: sun8i: rework for ths irq handler func

Here, we do something to prepare for the subsequent
support of multiple platforms.

1) rename sun50i_h6_irq_thread to sun8i_irq_thread, because
   this function should be suitable for all platforms.

2) introduce irq_ack callback to mask interrupt register
   differences.

Signed-off-by: Yangtao Li <tiny.windzz@...il.com>
---
 drivers/thermal/sun8i_thermal.c | 27 ++++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
index 59acbbac76e4..ed1c19bb27cf 100644
--- a/drivers/thermal/sun8i_thermal.c
+++ b/drivers/thermal/sun8i_thermal.c
@@ -60,6 +60,7 @@ struct ths_thermal_chip {
 	int		ft_deviation;
 	int		temp_data_base;
 	int		(*init)(struct ths_device *tmdev);
+	int             (*irq_ack)(struct ths_device *tmdev);
 };
 
 struct ths_device {
@@ -116,23 +117,34 @@ static const struct regmap_config config = {
 	.fast_io = true,
 };
 
-static irqreturn_t sun50i_h6_irq_thread(int irq, void *data)
+static int sun50i_h6_irq_ack(struct ths_device *tmdev)
 {
-	struct ths_device *tmdev = data;
-	int i, state;
+	int i, state, ret = 0;
 
 	regmap_read(tmdev->regmap, SUN50I_H6_THS_DIS, &state);
 
 	for (i = 0; i < tmdev->chip->sensor_num; i++) {
-
 		if (state & SUN50I_H6_THS_DATA_IRQ_STS(i)) {
-			/* clear data irq pending */
 			regmap_write(tmdev->regmap, SUN50I_H6_THS_DIS,
 				     SUN50I_H6_THS_DATA_IRQ_STS(i));
+			ret |= BIT(i);
+		}
+	}
+
+	return ret;
+}
 
+static irqreturn_t sun8i_irq_thread(int irq, void *data)
+{
+	struct ths_device *tmdev = data;
+	int i, state;
+
+	state = tmdev->chip->irq_ack(tmdev);
+
+	for (i = 0; i < tmdev->chip->sensor_num; i++) {
+		if (state & BIT(i))
 			thermal_zone_device_update(tmdev->sensor[i].tzd,
 						   THERMAL_EVENT_UNSPECIFIED);
-		}
 	}
 
 	return IRQ_HANDLED;
@@ -377,7 +389,7 @@ static int sun8i_ths_probe(struct platform_device *pdev)
 	 * the end.
 	 */
 	ret = devm_request_threaded_irq(dev, irq, NULL,
-					sun50i_h6_irq_thread,
+					sun8i_irq_thread,
 					IRQF_ONESHOT, "ths", tmdev);
 	if (ret)
 		return ret;
@@ -402,6 +414,7 @@ static const struct ths_thermal_chip sun50i_h6_ths = {
 	.ft_deviation = SUN50I_H6_FT_DEVIATION,
 	.temp_data_base = SUN50I_H6_THS_TEMP_DATA,
 	.init = sun50i_thermal_init,
+	.irq_ack = sun50i_h6_irq_ack,
 };
 
 static const struct of_device_id of_ths_match[] = {
-- 
2.17.1