linux-kernel - [PATCH] Input: gpio_mouse - switch to using input device polling mode

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Date:   Wed, 2 Oct 2019 15:00:48 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     linux-input@...r.kernel.org
Cc:     Hans-Christian Noren Egtvedt <egtvedt@...fundet.no>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] Input: gpio_mouse - switch to using input device polling mode

Now that instances of input_dev support polling mode natively,
we no longer need to create input_polled_dev instance.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/input/mouse/Kconfig      |  1 -
 drivers/input/mouse/gpio_mouse.c | 45 ++++++++++++++------------------
 2 files changed, 20 insertions(+), 26 deletions(-)

diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig
index 652c38e3c0b5..bf738d3b7fe4 100644
--- a/drivers/input/mouse/Kconfig
+++ b/drivers/input/mouse/Kconfig
@@ -381,7 +381,6 @@ config MOUSE_VSXXXAA
 config MOUSE_GPIO
 	tristate "GPIO mouse"
 	depends on GPIOLIB || COMPILE_TEST
-	select INPUT_POLLDEV
 	help
 	  This driver simulates a mouse on GPIO lines of various CPUs (and some
 	  other chips).
diff --git a/drivers/input/mouse/gpio_mouse.c b/drivers/input/mouse/gpio_mouse.c
index 461436f6f087..23507fce3a2b 100644
--- a/drivers/input/mouse/gpio_mouse.c
+++ b/drivers/input/mouse/gpio_mouse.c
@@ -8,7 +8,7 @@
 
 #include <linux/module.h>
 #include <linux/platform_device.h>
-#include <linux/input-polldev.h>
+#include <linux/input.h>
 #include <linux/gpio/consumer.h>
 #include <linux/property.h>
 #include <linux/of.h>
@@ -43,10 +43,9 @@ struct gpio_mouse {
  * Timer function which is run every scan_ms ms when the device is opened.
  * The dev input variable is set to the the input_dev pointer.
  */
-static void gpio_mouse_scan(struct input_polled_dev *dev)
+static void gpio_mouse_scan(struct input_dev *input)
 {
-	struct gpio_mouse *gpio = dev->private;
-	struct input_dev *input = dev->input;
+	struct gpio_mouse *gpio = input_get_drvdata(input);
 	int x, y;
 
 	if (gpio->bleft)
@@ -71,18 +70,17 @@ static int gpio_mouse_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct gpio_mouse *gmouse;
-	struct input_polled_dev *input_poll;
 	struct input_dev *input;
-	int ret;
+	int error;
 
 	gmouse = devm_kzalloc(dev, sizeof(*gmouse), GFP_KERNEL);
 	if (!gmouse)
 		return -ENOMEM;
 
 	/* Assign some default scanning time */
-	ret = device_property_read_u32(dev, "scan-interval-ms",
-				       &gmouse->scan_ms);
-	if (ret || gmouse->scan_ms == 0) {
+	error = device_property_read_u32(dev, "scan-interval-ms",
+					 &gmouse->scan_ms);
+	if (error || gmouse->scan_ms == 0) {
 		dev_warn(dev, "invalid scan time, set to 50 ms\n");
 		gmouse->scan_ms = 50;
 	}
@@ -112,23 +110,14 @@ static int gpio_mouse_probe(struct platform_device *pdev)
 	if (IS_ERR(gmouse->bright))
 		return PTR_ERR(gmouse->bright);
 
-	input_poll = devm_input_allocate_polled_device(dev);
-	if (!input_poll) {
-		dev_err(dev, "not enough memory for input device\n");
+	input = devm_input_allocate_device(dev);
+	if (!input)
 		return -ENOMEM;
-	}
-
-	platform_set_drvdata(pdev, input_poll);
-
-	/* set input-polldev handlers */
-	input_poll->private = gmouse;
-	input_poll->poll = gpio_mouse_scan;
-	input_poll->poll_interval = gmouse->scan_ms;
 
-	input = input_poll->input;
 	input->name = pdev->name;
 	input->id.bustype = BUS_HOST;
-	input->dev.parent = &pdev->dev;
+
+	input_set_drvdata(input, gmouse);
 
 	input_set_capability(input, EV_REL, REL_X);
 	input_set_capability(input, EV_REL, REL_Y);
@@ -139,10 +128,16 @@ static int gpio_mouse_probe(struct platform_device *pdev)
 	if (gmouse->bright)
 		input_set_capability(input, EV_KEY, BTN_RIGHT);
 
-	ret = input_register_polled_device(input_poll);
-	if (ret) {
+	error = input_setup_polling(input, gpio_mouse_scan);
+	if (error)
+		return error;
+
+	input_set_poll_interval(input, gmouse->scan_ms);
+
+	error = input_register_device(input);
+	if (error) {
 		dev_err(dev, "could not register input device\n");
-		return ret;
+		return error;
 	}
 
 	dev_dbg(dev, "%d ms scan time, buttons: %s%s%s\n",
-- 
2.23.0.444.g18eeb5a265-goog


-- 
Dmitry