linux-kernel - [PATCH] Input: imx6ul_tsc - unify open/close and PM paths

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Message-ID: <20200914175042.GA1497032@dtor-ws>
Date:   Mon, 14 Sep 2020 10:50:42 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     linux-input@...r.kernel.org
Cc:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] Input: imx6ul_tsc - unify open/close and PM paths

Open/close and resume/suspend paths are very similar, let's factor out
common parts.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/input/touchscreen/imx6ul_tsc.c | 52 +++++++++++---------------
 1 file changed, 22 insertions(+), 30 deletions(-)

diff --git a/drivers/input/touchscreen/imx6ul_tsc.c b/drivers/input/touchscreen/imx6ul_tsc.c
index 5e6ba5c4eca2..cd369f9ac5e6 100644
--- a/drivers/input/touchscreen/imx6ul_tsc.c
+++ b/drivers/input/touchscreen/imx6ul_tsc.c
@@ -315,9 +315,8 @@ static irqreturn_t adc_irq_fn(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static int imx6ul_tsc_open(struct input_dev *input_dev)
+static int imx6ul_tsc_start(struct imx6ul_tsc *tsc)
 {
-	struct imx6ul_tsc *tsc = input_get_drvdata(input_dev);
 	int err;
 
 	err = clk_prepare_enable(tsc->adc_clk);
@@ -349,16 +348,29 @@ static int imx6ul_tsc_open(struct input_dev *input_dev)
 	return err;
 }
 
-static void imx6ul_tsc_close(struct input_dev *input_dev)
+static void imx6ul_tsc_stop(struct imx6ul_tsc *tsc)
 {
-	struct imx6ul_tsc *tsc = input_get_drvdata(input_dev);
-
 	imx6ul_tsc_disable(tsc);
 
 	clk_disable_unprepare(tsc->tsc_clk);
 	clk_disable_unprepare(tsc->adc_clk);
 }
 
+
+static int imx6ul_tsc_open(struct input_dev *input_dev)
+{
+	struct imx6ul_tsc *tsc = input_get_drvdata(input_dev);
+
+	return imx6ul_tsc_start(tsc);
+}
+
+static void imx6ul_tsc_close(struct input_dev *input_dev)
+{
+	struct imx6ul_tsc *tsc = input_get_drvdata(input_dev);
+
+	imx6ul_tsc_stop(tsc);
+}
+
 static int imx6ul_tsc_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
@@ -509,12 +521,8 @@ static int __maybe_unused imx6ul_tsc_suspend(struct device *dev)
 
 	mutex_lock(&input_dev->mutex);
 
-	if (input_dev->users) {
-		imx6ul_tsc_disable(tsc);
-
-		clk_disable_unprepare(tsc->tsc_clk);
-		clk_disable_unprepare(tsc->adc_clk);
-	}
+	if (input_dev->users)
+		imx6ul_tsc_stop(tsc);
 
 	mutex_unlock(&input_dev->mutex);
 
@@ -530,27 +538,11 @@ static int __maybe_unused imx6ul_tsc_resume(struct device *dev)
 
 	mutex_lock(&input_dev->mutex);
 
-	if (!input_dev->users)
-		goto out;
-
-	retval = clk_prepare_enable(tsc->adc_clk);
-	if (retval)
-		goto out;
-
-	retval = clk_prepare_enable(tsc->tsc_clk);
-	if (retval) {
-		clk_disable_unprepare(tsc->adc_clk);
-		goto out;
-	}
+	if (input_dev->users)
+		retval = imx6ul_tsc_start(tsc);
 
-	retval = imx6ul_tsc_init(tsc);
-	if (retval) {
-		clk_disable_unprepare(tsc->tsc_clk);
-		clk_disable_unprepare(tsc->adc_clk);
-		goto out;
-	}
-out:
 	mutex_unlock(&input_dev->mutex);
+
 	return retval;
 }
 
-- 
2.28.0.618.gf4bc123cb7-goog


-- 
Dmitry