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Commit c8af781e authored by Dmitry Torokhov's avatar Dmitry Torokhov
Browse files

Input: bfin_rotary - introduce open and close methods 



Introduce open and close methods for the input device to postpone enabling
the device until it is needed.

Acked-by: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent f14d4df9

drivers/input/misc/bfin_rotary.c

+42 −28
Original line number Diff line number Diff line
@@ -34,6 +34,10 @@ struct bfin_rot { 
	unsigned int down_key;

	unsigned int button_key;

	unsigned int rel_code;



	unsigned short mode;

	unsigned short debounce;



	unsigned short cnt_config;

	unsigned short cnt_imask;

	unsigned short cnt_debounce;
@@ -92,6 +96,35 @@ static irqreturn_t bfin_rotary_isr(int irq, void *dev_id) 
	return IRQ_HANDLED;

}



static int bfin_rotary_open(struct input_dev *input)

{

	struct bfin_rot *rotary = input_get_drvdata(input);

	unsigned short val;



	if (rotary->mode & ROT_DEBE)

		writew(rotary->debounce & DPRESCALE,

			rotary->base + CNT_DEBOUNCE_OFF);



	writew(rotary->mode & ~CNTE, rotary->base + CNT_CONFIG_OFF);



	val = UCIE | DCIE;

	if (rotary->button_key)

		val |= CZMIE;

	writew(val, rotary->base + CNT_IMASK_OFF);



	writew(rotary->mode | CNTE, rotary->base + CNT_CONFIG_OFF);



	return 0;

}



static void bfin_rotary_close(struct input_dev *input)

{

	struct bfin_rot *rotary = input_get_drvdata(input);



	writew(0, rotary->base + CNT_CONFIG_OFF);

	writew(0, rotary->base + CNT_IMASK_OFF);

}



static void bfin_rotary_free_action(void *data)

{

	peripheral_free_list(data);
@@ -151,6 +184,9 @@ static int bfin_rotary_probe(struct platform_device *pdev) 
	rotary->button_key = pdata->rotary_button_key;

	rotary->rel_code = pdata->rotary_rel_code;



	rotary->mode = pdata->mode;

	rotary->debounce = pdata->debounce;



	input->name = pdev->name;

	input->phys = "bfin-rotary/input0";

	input->dev.parent = &pdev->dev;
@@ -162,6 +198,9 @@ static int bfin_rotary_probe(struct platform_device *pdev) 
	input->id.product = 0x0001;

	input->id.version = 0x0100;



	input->open = bfin_rotary_open;

	input->close = bfin_rotary_close;



	if (rotary->up_key) {

		__set_bit(EV_KEY, input->evbit);

		__set_bit(rotary->up_key, input->keybit);
@@ -176,6 +215,9 @@ static int bfin_rotary_probe(struct platform_device *pdev) 
		__set_bit(rotary->button_key, input->keybit);

	}



	/* Quiesce the device before requesting irq */

	bfin_rotary_close(input);



	rotary->irq = platform_get_irq(pdev, 0);

	if (rotary->irq < 0) {

		dev_err(dev, "No rotary IRQ specified\n");
@@ -196,39 +238,12 @@ static int bfin_rotary_probe(struct platform_device *pdev) 
		return error;

	}



	if (pdata->rotary_button_key)

		writew(CZMIE, rotary->base + CNT_IMASK_OFF);



	if (pdata->mode & ROT_DEBE)

		writew(pdata->debounce & DPRESCALE,

			rotary->base + CNT_DEBOUNCE_OFF);



	if (pdata->mode)

		writew(readw(rotary->base + CNT_CONFIG_OFF) |

			(pdata->mode & ~CNTE),

			rotary->base + CNT_CONFIG_OFF);



	writew(readw(rotary->base + CNT_IMASK_OFF) | UCIE | DCIE,

		rotary->base + CNT_IMASK_OFF);

	writew(readw(rotary->base + CNT_CONFIG_OFF) | CNTE,

		rotary->base + CNT_CONFIG_OFF);



	platform_set_drvdata(pdev, rotary);

	device_init_wakeup(&pdev->dev, 1);



	return 0;

}



static int bfin_rotary_remove(struct platform_device *pdev)

{

	struct bfin_rot *rotary = platform_get_drvdata(pdev);



	writew(0, rotary->base + CNT_CONFIG_OFF);

	writew(0, rotary->base + CNT_IMASK_OFF);



	return 0;

}



static int __maybe_unused bfin_rotary_suspend(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);
@@ -267,7 +282,6 @@ static SIMPLE_DEV_PM_OPS(bfin_rotary_pm_ops, 


static struct platform_driver bfin_rotary_device_driver = {

	.probe		= bfin_rotary_probe,

	.remove		= bfin_rotary_remove,

	.driver		= {

		.name	= "bfin-rotary",

		.pm	= &bfin_rotary_pm_ops,