linux-kernel - [PATCH] Input: gpio_keys - report initial state when opening the device

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Date:	Sun, 25 Nov 2012 00:31:22 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	linux-input@...r.kernel.org
Cc:	Lee Jones <lee.jones@...aro.org>,
	Bengt Jonsson <bengt.g.jonsson@...ricsson.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] Input: gpio_keys - report initial state when opening the
 device

Instead of reporting the initial stage when the device is registered we
should do it when the device is opened (so there are users).

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/input/keyboard/gpio_keys.c | 39 +++++++++++++++++++++++++-------------
 1 file changed, 26 insertions(+), 13 deletions(-)

diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index 1a5cb6f..c7764ca 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -526,12 +526,35 @@ fail:
 	return error;
 }
 
+static void gpio_keys_report_state(struct gpio_keys_drvdata *ddata)
+{
+	struct input_dev *input = ddata->input;
+	int i;
+
+	for (i = 0; i < ddata->pdata->nbuttons; i++) {
+		struct gpio_button_data *bdata = &ddata->data[i];
+		if (gpio_is_valid(bdata->button->gpio))
+			gpio_keys_gpio_report_event(bdata);
+	}
+	input_sync(input);
+}
+
 static int gpio_keys_open(struct input_dev *input)
 {
 	struct gpio_keys_drvdata *ddata = input_get_drvdata(input);
 	const struct gpio_keys_platform_data *pdata = ddata->pdata;
+	int error;
+
+	if (pdata->enable) {
+		error = pdata->enable(input->dev.parent);
+		if (error)
+			return error;
+	}
 
-	return pdata->enable ? pdata->enable(input->dev.parent) : 0;
+	/* Report current state of buttons that are connected to GPIOs */
+	gpio_keys_report_state(ddata);
+
+	return 0;
 }
 
 static void gpio_keys_close(struct input_dev *input)
@@ -731,14 +754,6 @@ static int gpio_keys_probe(struct platform_device *pdev)
 		goto fail3;
 	}
 
-	/* get current state of buttons that are connected to GPIOs */
-	for (i = 0; i < pdata->nbuttons; i++) {
-		struct gpio_button_data *bdata = &ddata->data[i];
-		if (gpio_is_valid(bdata->button->gpio))
-			gpio_keys_gpio_report_event(bdata);
-	}
-	input_sync(input);
-
 	device_init_wakeup(&pdev->dev, wakeup);
 
 	return 0;
@@ -810,11 +825,9 @@ static int gpio_keys_resume(struct device *dev)
 		struct gpio_button_data *bdata = &ddata->data[i];
 		if (bdata->button->wakeup && device_may_wakeup(dev))
 			disable_irq_wake(bdata->irq);
-
-		if (gpio_is_valid(bdata->button->gpio))
-			gpio_keys_gpio_report_event(bdata);
 	}
-	input_sync(ddata->input);
+
+	gpio_keys_report_state(ddata);
 
 	return 0;
 }
-- 
1.7.11.7


-- 
Dmitry
--
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