[mirror_ubuntu-jammy-kernel.git] / drivers / input / keyboard / samsung-keypad.c

/*
 * Samsung keypad driver
 *
 * Copyright (C) 2010 Samsung Electronics Co.Ltd
 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
 * Author: Donghwa Lee <dh09.lee@samsung.com>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/sched.h>
#include <linux/input/samsung-keypad.h>

#define SAMSUNG_KEYIFCON			0x00
#define SAMSUNG_KEYIFSTSCLR			0x04
#define SAMSUNG_KEYIFCOL			0x08
#define SAMSUNG_KEYIFROW			0x0c
#define SAMSUNG_KEYIFFC				0x10

/* SAMSUNG_KEYIFCON */
#define SAMSUNG_KEYIFCON_INT_F_EN		(1 << 0)
#define SAMSUNG_KEYIFCON_INT_R_EN		(1 << 1)
#define SAMSUNG_KEYIFCON_DF_EN			(1 << 2)
#define SAMSUNG_KEYIFCON_FC_EN			(1 << 3)
#define SAMSUNG_KEYIFCON_WAKEUPEN		(1 << 4)

/* SAMSUNG_KEYIFSTSCLR */
#define SAMSUNG_KEYIFSTSCLR_P_INT_MASK		(0xff << 0)
#define SAMSUNG_KEYIFSTSCLR_R_INT_MASK		(0xff << 8)
#define SAMSUNG_KEYIFSTSCLR_R_INT_OFFSET	8
#define S5PV210_KEYIFSTSCLR_P_INT_MASK		(0x3fff << 0)
#define S5PV210_KEYIFSTSCLR_R_INT_MASK		(0x3fff << 16)
#define S5PV210_KEYIFSTSCLR_R_INT_OFFSET	16

/* SAMSUNG_KEYIFCOL */
#define SAMSUNG_KEYIFCOL_MASK			(0xff << 0)
#define S5PV210_KEYIFCOLEN_MASK			(0xff << 8)

/* SAMSUNG_KEYIFROW */
#define SAMSUNG_KEYIFROW_MASK			(0xff << 0)
#define S5PV210_KEYIFROW_MASK			(0x3fff << 0)

/* SAMSUNG_KEYIFFC */
#define SAMSUNG_KEYIFFC_MASK			(0x3ff << 0)

enum samsung_keypad_type {
	KEYPAD_TYPE_SAMSUNG,
	KEYPAD_TYPE_S5PV210,
};

struct samsung_keypad {
	struct input_dev *input_dev;
	struct platform_device *pdev;
	struct clk *clk;
	void __iomem *base;
	wait_queue_head_t wait;
	bool stopped;
	bool wake_enabled;
	int irq;
	enum samsung_keypad_type type;
	unsigned int row_shift;
	unsigned int rows;
	unsigned int cols;
	unsigned int row_state[SAMSUNG_MAX_COLS];
#ifdef CONFIG_OF
	int row_gpios[SAMSUNG_MAX_ROWS];
	int col_gpios[SAMSUNG_MAX_COLS];
#endif
	unsigned short keycodes[];
};

static void samsung_keypad_scan(struct samsung_keypad *keypad,
				unsigned int *row_state)
{
	unsigned int col;
	unsigned int val;

	for (col = 0; col < keypad->cols; col++) {
		if (keypad->type == KEYPAD_TYPE_S5PV210) {
			val = S5PV210_KEYIFCOLEN_MASK;
			val &= ~(1 << col) << 8;
		} else {
			val = SAMSUNG_KEYIFCOL_MASK;
			val &= ~(1 << col);
		}

		writel(val, keypad->base + SAMSUNG_KEYIFCOL);
		mdelay(1);

		val = readl(keypad->base + SAMSUNG_KEYIFROW);
		row_state[col] = ~val & ((1 << keypad->rows) - 1);
	}

	/* KEYIFCOL reg clear */
	writel(0, keypad->base + SAMSUNG_KEYIFCOL);
}

static bool samsung_keypad_report(struct samsung_keypad *keypad,
				  unsigned int *row_state)
{
	struct input_dev *input_dev = keypad->input_dev;
	unsigned int changed;
	unsigned int pressed;
	unsigned int key_down = 0;
	unsigned int val;
	unsigned int col, row;

	for (col = 0; col < keypad->cols; col++) {
		changed = row_state[col] ^ keypad->row_state[col];
		key_down |= row_state[col];
		if (!changed)
			continue;

		for (row = 0; row < keypad->rows; row++) {
			if (!(changed & (1 << row)))
				continue;

			pressed = row_state[col] & (1 << row);

			dev_dbg(&keypad->input_dev->dev,
				"key %s, row: %d, col: %d\n",
				pressed ? "pressed" : "released", row, col);

			val = MATRIX_SCAN_CODE(row, col, keypad->row_shift);

			input_event(input_dev, EV_MSC, MSC_SCAN, val);
			input_report_key(input_dev,
					keypad->keycodes[val], pressed);
		}
		input_sync(keypad->input_dev);
	}

	memcpy(keypad->row_state, row_state, sizeof(keypad->row_state));

	return key_down;
}

static irqreturn_t samsung_keypad_irq(int irq, void *dev_id)
{
	struct samsung_keypad *keypad = dev_id;
	unsigned int row_state[SAMSUNG_MAX_COLS];
	unsigned int val;
	bool key_down;

	pm_runtime_get_sync(&keypad->pdev->dev);

	do {
		val = readl(keypad->base + SAMSUNG_KEYIFSTSCLR);
		/* Clear interrupt. */
		writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);

		samsung_keypad_scan(keypad, row_state);

		key_down = samsung_keypad_report(keypad, row_state);
		if (key_down)
			wait_event_timeout(keypad->wait, keypad->stopped,
					   msecs_to_jiffies(50));

	} while (key_down && !keypad->stopped);

	pm_runtime_put_sync(&keypad->pdev->dev);

	return IRQ_HANDLED;
}

static void samsung_keypad_start(struct samsung_keypad *keypad)
{
	unsigned int val;

	pm_runtime_get_sync(&keypad->pdev->dev);

	/* Tell IRQ thread that it may poll the device. */
	keypad->stopped = false;

	clk_enable(keypad->clk);

	/* Enable interrupt bits. */
	val = readl(keypad->base + SAMSUNG_KEYIFCON);
	val |= SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN;
	writel(val, keypad->base + SAMSUNG_KEYIFCON);

	/* KEYIFCOL reg clear. */
	writel(0, keypad->base + SAMSUNG_KEYIFCOL);

	pm_runtime_put_sync(&keypad->pdev->dev);
}

static void samsung_keypad_stop(struct samsung_keypad *keypad)
{
	unsigned int val;

	pm_runtime_get_sync(&keypad->pdev->dev);

	/* Signal IRQ thread to stop polling and disable the handler. */
	keypad->stopped = true;
	wake_up(&keypad->wait);
	disable_irq(keypad->irq);

	/* Clear interrupt. */
	writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);

	/* Disable interrupt bits. */
	val = readl(keypad->base + SAMSUNG_KEYIFCON);
	val &= ~(SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN);
	writel(val, keypad->base + SAMSUNG_KEYIFCON);

	clk_disable(keypad->clk);

	/*
	 * Now that chip should not generate interrupts we can safely
	 * re-enable the handler.
	 */
	enable_irq(keypad->irq);

	pm_runtime_put_sync(&keypad->pdev->dev);
}

static int samsung_keypad_open(struct input_dev *input_dev)
{
	struct samsung_keypad *keypad = input_get_drvdata(input_dev);

	samsung_keypad_start(keypad);

	return 0;
}

static void samsung_keypad_close(struct input_dev *input_dev)
{
	struct samsung_keypad *keypad = input_get_drvdata(input_dev);

	samsung_keypad_stop(keypad);
}

#ifdef CONFIG_OF
static struct samsung_keypad_platdata *samsung_keypad_parse_dt(
				struct device *dev)
{
	struct samsung_keypad_platdata *pdata;
	struct matrix_keymap_data *keymap_data;
	uint32_t *keymap, num_rows = 0, num_cols = 0;
	struct device_node *np = dev->of_node, *key_np;
	unsigned int key_count = 0;

	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata) {
		dev_err(dev, "could not allocate memory for platform data\n");
		return NULL;
	}

	of_property_read_u32(np, "samsung,keypad-num-rows", &num_rows);
	of_property_read_u32(np, "samsung,keypad-num-columns", &num_cols);
	if (!num_rows || !num_cols) {
		dev_err(dev, "number of keypad rows/columns not specified\n");
		return NULL;
	}
	pdata->rows = num_rows;
	pdata->cols = num_cols;

	keymap_data = devm_kzalloc(dev, sizeof(*keymap_data), GFP_KERNEL);
	if (!keymap_data) {
		dev_err(dev, "could not allocate memory for keymap data\n");
		return NULL;
	}
	pdata->keymap_data = keymap_data;

	for_each_child_of_node(np, key_np)
		key_count++;

	keymap_data->keymap_size = key_count;
	keymap = devm_kzalloc(dev, sizeof(uint32_t) * key_count, GFP_KERNEL);
	if (!keymap) {
		dev_err(dev, "could not allocate memory for keymap\n");
		return NULL;
	}
	keymap_data->keymap = keymap;

	for_each_child_of_node(np, key_np) {
		u32 row, col, key_code;
		of_property_read_u32(key_np, "keypad,row", &row);
		of_property_read_u32(key_np, "keypad,column", &col);
		of_property_read_u32(key_np, "linux,code", &key_code);
		*keymap++ = KEY(row, col, key_code);
	}

	if (of_get_property(np, "linux,input-no-autorepeat", NULL))
		pdata->no_autorepeat = true;
	if (of_get_property(np, "linux,input-wakeup", NULL))
		pdata->wakeup = true;

	return pdata;
}

static void samsung_keypad_parse_dt_gpio(struct device *dev,
				struct samsung_keypad *keypad)
{
	struct device_node *np = dev->of_node;
	int gpio, ret, row, col;

	for (row = 0; row < keypad->rows; row++) {
		gpio = of_get_named_gpio(np, "row-gpios", row);
		keypad->row_gpios[row] = gpio;
		if (!gpio_is_valid(gpio)) {
			dev_err(dev, "keypad row[%d]: invalid gpio %d\n",
					row, gpio);
			continue;
		}

		ret = gpio_request(gpio, "keypad-row");
		if (ret)
			dev_err(dev, "keypad row[%d] gpio request failed\n",
					row);
	}

	for (col = 0; col < keypad->cols; col++) {
		gpio = of_get_named_gpio(np, "col-gpios", col);
		keypad->col_gpios[col] = gpio;
		if (!gpio_is_valid(gpio)) {
			dev_err(dev, "keypad column[%d]: invalid gpio %d\n",
					col, gpio);
			continue;
		}

		ret = gpio_request(gpio, "keypad-col");
		if (ret)
			dev_err(dev, "keypad column[%d] gpio request failed\n",
					col);
	}
}

static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad)
{
	int cnt;

	for (cnt = 0; cnt < keypad->rows; cnt++)
		if (gpio_is_valid(keypad->row_gpios[cnt]))
			gpio_free(keypad->row_gpios[cnt]);

	for (cnt = 0; cnt < keypad->cols; cnt++)
		if (gpio_is_valid(keypad->col_gpios[cnt]))
			gpio_free(keypad->col_gpios[cnt]);
}
#else
static
struct samsung_keypad_platdata *samsung_keypad_parse_dt(struct device *dev)
{
	return NULL;
}

static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad)
{
}
#endif

static int __devinit samsung_keypad_probe(struct platform_device *pdev)
{
	const struct samsung_keypad_platdata *pdata;
	const struct matrix_keymap_data *keymap_data;
	struct samsung_keypad *keypad;
	struct resource *res;
	struct input_dev *input_dev;
	unsigned int row_shift;
	unsigned int keymap_size;
	int error;

	if (pdev->dev.of_node)
		pdata = samsung_keypad_parse_dt(&pdev->dev);
	else
		pdata = pdev->dev.platform_data;
	if (!pdata) {
		dev_err(&pdev->dev, "no platform data defined\n");
		return -EINVAL;
	}

	keymap_data = pdata->keymap_data;
	if (!keymap_data) {
		dev_err(&pdev->dev, "no keymap data defined\n");
		return -EINVAL;
	}

	if (!pdata->rows || pdata->rows > SAMSUNG_MAX_ROWS)
		return -EINVAL;

	if (!pdata->cols || pdata->cols > SAMSUNG_MAX_COLS)
		return -EINVAL;

	/* initialize the gpio */
	if (pdata->cfg_gpio)
		pdata->cfg_gpio(pdata->rows, pdata->cols);

	row_shift = get_count_order(pdata->cols);
	keymap_size = (pdata->rows << row_shift) * sizeof(keypad->keycodes[0]);

	keypad = kzalloc(sizeof(*keypad) + keymap_size, GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!keypad || !input_dev) {
		error = -ENOMEM;
		goto err_free_mem;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		error = -ENODEV;
		goto err_free_mem;
	}

	keypad->base = ioremap(res->start, resource_size(res));
	if (!keypad->base) {
		error = -EBUSY;
		goto err_free_mem;
	}

	keypad->clk = clk_get(&pdev->dev, "keypad");
	if (IS_ERR(keypad->clk)) {
		dev_err(&pdev->dev, "failed to get keypad clk\n");
		error = PTR_ERR(keypad->clk);
		goto err_unmap_base;
	}

	keypad->input_dev = input_dev;
	keypad->pdev = pdev;
	keypad->row_shift = row_shift;
	keypad->rows = pdata->rows;
	keypad->cols = pdata->cols;
	keypad->stopped = true;
	init_waitqueue_head(&keypad->wait);

	if (pdev->dev.of_node) {
#ifdef CONFIG_OF
		samsung_keypad_parse_dt_gpio(&pdev->dev, keypad);
		keypad->type = of_device_is_compatible(pdev->dev.of_node,
					"samsung,s5pv210-keypad");
#endif
	} else {
		keypad->type = platform_get_device_id(pdev)->driver_data;
	}

	input_dev->name = pdev->name;
	input_dev->id.bustype = BUS_HOST;
	input_dev->dev.parent = &pdev->dev;
	input_set_drvdata(input_dev, keypad);

	input_dev->open = samsung_keypad_open;
	input_dev->close = samsung_keypad_close;

	input_dev->evbit[0] = BIT_MASK(EV_KEY);
	if (!pdata->no_autorepeat)
		input_dev->evbit[0] |= BIT_MASK(EV_REP);

	input_set_capability(input_dev, EV_MSC, MSC_SCAN);

	input_dev->keycode = keypad->keycodes;
	input_dev->keycodesize = sizeof(keypad->keycodes[0]);
	input_dev->keycodemax = pdata->rows << row_shift;

	matrix_keypad_build_keymap(keymap_data, row_shift,
			input_dev->keycode, input_dev->keybit);

	keypad->irq = platform_get_irq(pdev, 0);
	if (keypad->irq < 0) {
		error = keypad->irq;
		goto err_put_clk;
	}

	error = request_threaded_irq(keypad->irq, NULL, samsung_keypad_irq,
			IRQF_ONESHOT, dev_name(&pdev->dev), keypad);
	if (error) {
		dev_err(&pdev->dev, "failed to register keypad interrupt\n");
		goto err_put_clk;
	}

	device_init_wakeup(&pdev->dev, pdata->wakeup);
	platform_set_drvdata(pdev, keypad);
	pm_runtime_enable(&pdev->dev);

	error = input_register_device(keypad->input_dev);
	if (error)
		goto err_free_irq;

	if (pdev->dev.of_node) {
		devm_kfree(&pdev->dev, (void *)pdata->keymap_data->keymap);
		devm_kfree(&pdev->dev, (void *)pdata->keymap_data);
		devm_kfree(&pdev->dev, (void *)pdata);
	}
	return 0;

err_free_irq:
	free_irq(keypad->irq, keypad);
	pm_runtime_disable(&pdev->dev);
	device_init_wakeup(&pdev->dev, 0);
	platform_set_drvdata(pdev, NULL);
err_put_clk:
	clk_put(keypad->clk);
	samsung_keypad_dt_gpio_free(keypad);
err_unmap_base:
	iounmap(keypad->base);
err_free_mem:
	input_free_device(input_dev);
	kfree(keypad);

	return error;
}

static int __devexit samsung_keypad_remove(struct platform_device *pdev)
{
	struct samsung_keypad *keypad = platform_get_drvdata(pdev);

	pm_runtime_disable(&pdev->dev);
	device_init_wakeup(&pdev->dev, 0);
	platform_set_drvdata(pdev, NULL);

	input_unregister_device(keypad->input_dev);

	/*
	 * It is safe to free IRQ after unregistering device because
	 * samsung_keypad_close will shut off interrupts.
	 */
	free_irq(keypad->irq, keypad);

	clk_put(keypad->clk);
	samsung_keypad_dt_gpio_free(keypad);

	iounmap(keypad->base);
	kfree(keypad);

	return 0;
}

#ifdef CONFIG_PM_RUNTIME
static int samsung_keypad_runtime_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct samsung_keypad *keypad = platform_get_drvdata(pdev);
	unsigned int val;
	int error;

	if (keypad->stopped)
		return 0;

	/* This may fail on some SoCs due to lack of controller support */
	error = enable_irq_wake(keypad->irq);
	if (!error)
		keypad->wake_enabled = true;

	val = readl(keypad->base + SAMSUNG_KEYIFCON);
	val |= SAMSUNG_KEYIFCON_WAKEUPEN;
	writel(val, keypad->base + SAMSUNG_KEYIFCON);

	clk_disable(keypad->clk);

	return 0;
}

static int samsung_keypad_runtime_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct samsung_keypad *keypad = platform_get_drvdata(pdev);
	unsigned int val;

	if (keypad->stopped)
		return 0;

	clk_enable(keypad->clk);

	val = readl(keypad->base + SAMSUNG_KEYIFCON);
	val &= ~SAMSUNG_KEYIFCON_WAKEUPEN;
	writel(val, keypad->base + SAMSUNG_KEYIFCON);

	if (keypad->wake_enabled)
		disable_irq_wake(keypad->irq);

	return 0;
}
#endif

#ifdef CONFIG_PM_SLEEP
static void samsung_keypad_toggle_wakeup(struct samsung_keypad *keypad,
					 bool enable)
{
	unsigned int val;

	clk_enable(keypad->clk);

	val = readl(keypad->base + SAMSUNG_KEYIFCON);
	if (enable) {
		val |= SAMSUNG_KEYIFCON_WAKEUPEN;
		if (device_may_wakeup(&keypad->pdev->dev))
			enable_irq_wake(keypad->irq);
	} else {
		val &= ~SAMSUNG_KEYIFCON_WAKEUPEN;
		if (device_may_wakeup(&keypad->pdev->dev))
			disable_irq_wake(keypad->irq);
	}
	writel(val, keypad->base + SAMSUNG_KEYIFCON);

	clk_disable(keypad->clk);
}

static int samsung_keypad_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct samsung_keypad *keypad = platform_get_drvdata(pdev);
	struct input_dev *input_dev = keypad->input_dev;

	mutex_lock(&input_dev->mutex);

	if (input_dev->users)
		samsung_keypad_stop(keypad);

	samsung_keypad_toggle_wakeup(keypad, true);

	mutex_unlock(&input_dev->mutex);

	return 0;
}

static int samsung_keypad_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct samsung_keypad *keypad = platform_get_drvdata(pdev);
	struct input_dev *input_dev = keypad->input_dev;

	mutex_lock(&input_dev->mutex);

	samsung_keypad_toggle_wakeup(keypad, false);

	if (input_dev->users)
		samsung_keypad_start(keypad);

	mutex_unlock(&input_dev->mutex);

	return 0;
}
#endif

static const struct dev_pm_ops samsung_keypad_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(samsung_keypad_suspend, samsung_keypad_resume)
	SET_RUNTIME_PM_OPS(samsung_keypad_runtime_suspend,
			   samsung_keypad_runtime_resume, NULL)
};

#ifdef CONFIG_OF
static const struct of_device_id samsung_keypad_dt_match[] = {
	{ .compatible = "samsung,s3c6410-keypad" },
	{ .compatible = "samsung,s5pv210-keypad" },
	{},
};
MODULE_DEVICE_TABLE(of, samsung_keypad_dt_match);
#else
#define samsung_keypad_dt_match NULL
#endif

static struct platform_device_id samsung_keypad_driver_ids[] = {
	{
		.name		= "samsung-keypad",
		.driver_data	= KEYPAD_TYPE_SAMSUNG,
	}, {
		.name		= "s5pv210-keypad",
		.driver_data	= KEYPAD_TYPE_S5PV210,
	},
	{ },
};
MODULE_DEVICE_TABLE(platform, samsung_keypad_driver_ids);

static struct platform_driver samsung_keypad_driver = {
	.probe		= samsung_keypad_probe,
	.remove		= __devexit_p(samsung_keypad_remove),
	.driver		= {
		.name	= "samsung-keypad",
		.owner	= THIS_MODULE,
		.of_match_table = samsung_keypad_dt_match,
		.pm	= &samsung_keypad_pm_ops,
	},
	.id_table	= samsung_keypad_driver_ids,
};
module_platform_driver(samsung_keypad_driver);

MODULE_DESCRIPTION("Samsung keypad driver");
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
0fffed27 JS	1	/*
	2	* Samsung keypad driver
	3	*
	4	* Copyright (C) 2010 Samsung Electronics Co.Ltd
	5	* Author: Joonyoung Shim <jy0922.shim@samsung.com>
	6	* Author: Donghwa Lee <dh09.lee@samsung.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*/
	13
	14	#include <linux/clk.h>
	15	#include <linux/delay.h>
	16	#include <linux/err.h>
	17	#include <linux/init.h>
	18	#include <linux/input.h>
	19	#include <linux/interrupt.h>
	20	#include <linux/io.h>
	21	#include <linux/module.h>
	22	#include <linux/platform_device.h>
48c98b1b MB	23	#include <linux/pm.h>
48c98b1b MB	24	#include <linux/pm_runtime.h>
0fffed27	25	#include <linux/slab.h>
b3d6ac3e TA	26	#include <linux/of.h>
b3d6ac3e TA	27	#include <linux/of_gpio.h>
0fffed27	28	#include <linux/sched.h>
8d964a28	29	#include <linux/input/samsung-keypad.h>
0fffed27 JS	30
	31	#define SAMSUNG_KEYIFCON 0x00
	32	#define SAMSUNG_KEYIFSTSCLR 0x04
	33	#define SAMSUNG_KEYIFCOL 0x08
	34	#define SAMSUNG_KEYIFROW 0x0c
	35	#define SAMSUNG_KEYIFFC 0x10
	36
	37	/* SAMSUNG_KEYIFCON */
	38	#define SAMSUNG_KEYIFCON_INT_F_EN (1 << 0)
	39	#define SAMSUNG_KEYIFCON_INT_R_EN (1 << 1)
	40	#define SAMSUNG_KEYIFCON_DF_EN (1 << 2)
	41	#define SAMSUNG_KEYIFCON_FC_EN (1 << 3)
	42	#define SAMSUNG_KEYIFCON_WAKEUPEN (1 << 4)
	43
	44	/* SAMSUNG_KEYIFSTSCLR */
	45	#define SAMSUNG_KEYIFSTSCLR_P_INT_MASK (0xff << 0)
	46	#define SAMSUNG_KEYIFSTSCLR_R_INT_MASK (0xff << 8)
	47	#define SAMSUNG_KEYIFSTSCLR_R_INT_OFFSET 8
	48	#define S5PV210_KEYIFSTSCLR_P_INT_MASK (0x3fff << 0)
	49	#define S5PV210_KEYIFSTSCLR_R_INT_MASK (0x3fff << 16)
	50	#define S5PV210_KEYIFSTSCLR_R_INT_OFFSET 16
	51
	52	/* SAMSUNG_KEYIFCOL */
	53	#define SAMSUNG_KEYIFCOL_MASK (0xff << 0)
	54	#define S5PV210_KEYIFCOLEN_MASK (0xff << 8)
	55
	56	/* SAMSUNG_KEYIFROW */
	57	#define SAMSUNG_KEYIFROW_MASK (0xff << 0)
	58	#define S5PV210_KEYIFROW_MASK (0x3fff << 0)
	59
	60	/* SAMSUNG_KEYIFFC */
	61	#define SAMSUNG_KEYIFFC_MASK (0x3ff << 0)
	62
	63	enum samsung_keypad_type {
	64	KEYPAD_TYPE_SAMSUNG,
	65	KEYPAD_TYPE_S5PV210,
	66	};
	67
	68	struct samsung_keypad {
	69	struct input_dev *input_dev;
48c98b1b	70	struct platform_device *pdev;
0fffed27 JS	71	struct clk *clk;
	72	void __iomem *base;
	73	wait_queue_head_t wait;
	74	bool stopped;
48c98b1b	75	bool wake_enabled;
0fffed27	76	int irq;
b3d6ac3e	77	enum samsung_keypad_type type;
0fffed27 JS	78	unsigned int row_shift;
	79	unsigned int rows;
	80	unsigned int cols;
	81	unsigned int row_state[SAMSUNG_MAX_COLS];
b3d6ac3e TA	82	#ifdef CONFIG_OF
	83	int row_gpios[SAMSUNG_MAX_ROWS];
	84	int col_gpios[SAMSUNG_MAX_COLS];
	85	#endif
0fffed27 JS	86	unsigned short keycodes[];
	87	};
	88
0fffed27 JS	89	static void samsung_keypad_scan(struct samsung_keypad *keypad,
	90	unsigned int *row_state)
	91	{
0fffed27 JS	92	unsigned int col;
	93	unsigned int val;
	94
	95	for (col = 0; col < keypad->cols; col++) {
b3d6ac3e	96	if (keypad->type == KEYPAD_TYPE_S5PV210) {
0fffed27 JS	97	val = S5PV210_KEYIFCOLEN_MASK;
	98	val &= ~(1 << col) << 8;
	99	} else {
	100	val = SAMSUNG_KEYIFCOL_MASK;
	101	val &= ~(1 << col);
	102	}
	103
	104	writel(val, keypad->base + SAMSUNG_KEYIFCOL);
	105	mdelay(1);
	106
	107	val = readl(keypad->base + SAMSUNG_KEYIFROW);
	108	row_state[col] = ~val & ((1 << keypad->rows) - 1);
	109	}
	110
	111	/* KEYIFCOL reg clear */
	112	writel(0, keypad->base + SAMSUNG_KEYIFCOL);
	113	}
	114
	115	static bool samsung_keypad_report(struct samsung_keypad *keypad,
	116	unsigned int *row_state)
	117	{
	118	struct input_dev *input_dev = keypad->input_dev;
	119	unsigned int changed;
	120	unsigned int pressed;
	121	unsigned int key_down = 0;
	122	unsigned int val;
	123	unsigned int col, row;
	124
	125	for (col = 0; col < keypad->cols; col++) {
	126	changed = row_state[col] ^ keypad->row_state[col];
	127	key_down \|= row_state[col];
	128	if (!changed)
	129	continue;
	130
	131	for (row = 0; row < keypad->rows; row++) {
	132	if (!(changed & (1 << row)))
	133	continue;
	134
	135	pressed = row_state[col] & (1 << row);
	136
	137	dev_dbg(&keypad->input_dev->dev,
	138	"key %s, row: %d, col: %d\n",
	139	pressed ? "pressed" : "released", row, col);
	140
	141	val = MATRIX_SCAN_CODE(row, col, keypad->row_shift);
	142
	143	input_event(input_dev, EV_MSC, MSC_SCAN, val);
	144	input_report_key(input_dev,
	145	keypad->keycodes[val], pressed);
	146	}
	147	input_sync(keypad->input_dev);
	148	}
	149
	150	memcpy(keypad->row_state, row_state, sizeof(keypad->row_state));
	151
	152	return key_down;
	153	}
	154
	155	static irqreturn_t samsung_keypad_irq(int irq, void *dev_id)
	156	{
	157	struct samsung_keypad *keypad = dev_id;
	158	unsigned int row_state[SAMSUNG_MAX_COLS];
	159	unsigned int val;
	160	bool key_down;
161
48c98b1b MB	162	pm_runtime_get_sync(&keypad->pdev->dev);
48c98b1b MB	163
0fffed27 JS	164	do {
	165	val = readl(keypad->base + SAMSUNG_KEYIFSTSCLR);
	166	/* Clear interrupt. */
	167	writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);
	168
	169	samsung_keypad_scan(keypad, row_state);
	170
	171	key_down = samsung_keypad_report(keypad, row_state);
	172	if (key_down)
	173	wait_event_timeout(keypad->wait, keypad->stopped,
	174	msecs_to_jiffies(50));
	175
	176	} while (key_down && !keypad->stopped);
	177
48c98b1b MB	178	pm_runtime_put_sync(&keypad->pdev->dev);
48c98b1b MB	179
0fffed27 JS	180	return IRQ_HANDLED;
	181	}
	182
	183	static void samsung_keypad_start(struct samsung_keypad *keypad)
	184	{
	185	unsigned int val;
	186
48c98b1b MB	187	pm_runtime_get_sync(&keypad->pdev->dev);
48c98b1b MB	188
0fffed27 JS	189	/* Tell IRQ thread that it may poll the device. */
	190	keypad->stopped = false;
	191
	192	clk_enable(keypad->clk);
	193
	194	/* Enable interrupt bits. */
	195	val = readl(keypad->base + SAMSUNG_KEYIFCON);
	196	val \|= SAMSUNG_KEYIFCON_INT_F_EN \| SAMSUNG_KEYIFCON_INT_R_EN;
	197	writel(val, keypad->base + SAMSUNG_KEYIFCON);
	198
	199	/* KEYIFCOL reg clear. */
	200	writel(0, keypad->base + SAMSUNG_KEYIFCOL);
48c98b1b MB	201
48c98b1b MB	202	pm_runtime_put_sync(&keypad->pdev->dev);
0fffed27 JS	203	}
	204
	205	static void samsung_keypad_stop(struct samsung_keypad *keypad)
	206	{
	207	unsigned int val;
	208
48c98b1b MB	209	pm_runtime_get_sync(&keypad->pdev->dev);
48c98b1b MB	210
0fffed27 JS	211	/* Signal IRQ thread to stop polling and disable the handler. */
	212	keypad->stopped = true;
	213	wake_up(&keypad->wait);
	214	disable_irq(keypad->irq);
	215
	216	/* Clear interrupt. */
	217	writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);
	218
	219	/* Disable interrupt bits. */
	220	val = readl(keypad->base + SAMSUNG_KEYIFCON);
	221	val &= ~(SAMSUNG_KEYIFCON_INT_F_EN \| SAMSUNG_KEYIFCON_INT_R_EN);
	222	writel(val, keypad->base + SAMSUNG_KEYIFCON);
	223
	224	clk_disable(keypad->clk);
	225
	226	/*
	227	* Now that chip should not generate interrupts we can safely
	228	* re-enable the handler.
	229	*/
	230	enable_irq(keypad->irq);
48c98b1b MB	231
48c98b1b MB	232	pm_runtime_put_sync(&keypad->pdev->dev);
0fffed27 JS	233	}
	234
	235	static int samsung_keypad_open(struct input_dev *input_dev)
	236	{
	237	struct samsung_keypad *keypad = input_get_drvdata(input_dev);
	238
	239	samsung_keypad_start(keypad);
	240
	241	return 0;
	242	}
	243
	244	static void samsung_keypad_close(struct input_dev *input_dev)
	245	{
	246	struct samsung_keypad *keypad = input_get_drvdata(input_dev);
	247
	248	samsung_keypad_stop(keypad);
	249	}
	250
b3d6ac3e TA	251	#ifdef CONFIG_OF
	252	static struct samsung_keypad_platdata *samsung_keypad_parse_dt(
	253	struct device *dev)
	254	{
	255	struct samsung_keypad_platdata *pdata;
	256	struct matrix_keymap_data *keymap_data;
	257	uint32_t *keymap, num_rows = 0, num_cols = 0;
	258	struct device_node np = dev->of_node, key_np;
	259	unsigned int key_count = 0;
	260
	261	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	262	if (!pdata) {
	263	dev_err(dev, "could not allocate memory for platform data\n");
	264	return NULL;
	265	}
	266
	267	of_property_read_u32(np, "samsung,keypad-num-rows", &num_rows);
	268	of_property_read_u32(np, "samsung,keypad-num-columns", &num_cols);
	269	if (!num_rows \|\| !num_cols) {
	270	dev_err(dev, "number of keypad rows/columns not specified\n");
	271	return NULL;
	272	}
	273	pdata->rows = num_rows;
	274	pdata->cols = num_cols;
	275
	276	keymap_data = devm_kzalloc(dev, sizeof(*keymap_data), GFP_KERNEL);
	277	if (!keymap_data) {
	278	dev_err(dev, "could not allocate memory for keymap data\n");
	279	return NULL;
	280	}
	281	pdata->keymap_data = keymap_data;
	282
	283	for_each_child_of_node(np, key_np)
	284	key_count++;
	285
	286	keymap_data->keymap_size = key_count;
	287	keymap = devm_kzalloc(dev, sizeof(uint32_t) * key_count, GFP_KERNEL);
	288	if (!keymap) {
	289	dev_err(dev, "could not allocate memory for keymap\n");
	290	return NULL;
	291	}
	292	keymap_data->keymap = keymap;
	293
	294	for_each_child_of_node(np, key_np) {
	295	u32 row, col, key_code;
	296	of_property_read_u32(key_np, "keypad,row", &row);
	297	of_property_read_u32(key_np, "keypad,column", &col);
	298	of_property_read_u32(key_np, "linux,code", &key_code);
	299	*keymap++ = KEY(row, col, key_code);
	300	}
	301
	302	if (of_get_property(np, "linux,input-no-autorepeat", NULL))
	303	pdata->no_autorepeat = true;
	304	if (of_get_property(np, "linux,input-wakeup", NULL))
	305	pdata->wakeup = true;
	306
	307	return pdata;
	308	}
	309
	310	static void samsung_keypad_parse_dt_gpio(struct device *dev,
	311	struct samsung_keypad *keypad)
	312	{
	313	struct device_node *np = dev->of_node;
	314	int gpio, ret, row, col;
315
316	for (row = 0; row < keypad->rows; row++) {
317	gpio = of_get_named_gpio(np, "row-gpios", row);
318	keypad->row_gpios[row] = gpio;
319	if (!gpio_is_valid(gpio)) {
320	dev_err(dev, "keypad row[%d]: invalid gpio %d\n",
321	row, gpio);
322	continue;
323	}
324
325	ret = gpio_request(gpio, "keypad-row");
326	if (ret)
327	dev_err(dev, "keypad row[%d] gpio request failed\n",
328	row);
329	}
330
331	for (col = 0; col < keypad->cols; col++) {
332	gpio = of_get_named_gpio(np, "col-gpios", col);
333	keypad->col_gpios[col] = gpio;
334	if (!gpio_is_valid(gpio)) {
335	dev_err(dev, "keypad column[%d]: invalid gpio %d\n",
336	col, gpio);
337	continue;
338	}
339
340	ret = gpio_request(gpio, "keypad-col");
341	if (ret)
342	dev_err(dev, "keypad column[%d] gpio request failed\n",
343	col);
344	}
345	}
346
347	static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad)
348	{
349	int cnt;
350
351	for (cnt = 0; cnt < keypad->rows; cnt++)
352	if (gpio_is_valid(keypad->row_gpios[cnt]))
353	gpio_free(keypad->row_gpios[cnt]);
354
355	for (cnt = 0; cnt < keypad->cols; cnt++)
356	if (gpio_is_valid(keypad->col_gpios[cnt]))
357	gpio_free(keypad->col_gpios[cnt]);
358	}
359	#else
360	static
361	struct samsung_keypad_platdata samsung_keypad_parse_dt(struct device dev)
362	{
363	return NULL;
364	}
365
366	static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad)
367	{
368	}
369	#endif
370
0fffed27 JS	371	static int __devinit samsung_keypad_probe(struct platform_device *pdev)
	372	{
	373	const struct samsung_keypad_platdata *pdata;
	374	const struct matrix_keymap_data *keymap_data;
	375	struct samsung_keypad *keypad;
	376	struct resource *res;
	377	struct input_dev *input_dev;
	378	unsigned int row_shift;
	379	unsigned int keymap_size;
	380	int error;
	381
b3d6ac3e TA	382	if (pdev->dev.of_node)
	383	pdata = samsung_keypad_parse_dt(&pdev->dev);
	384	else
	385	pdata = pdev->dev.platform_data;
0fffed27 JS	386	if (!pdata) {
	387	dev_err(&pdev->dev, "no platform data defined\n");
	388	return -EINVAL;
	389	}
	390
	391	keymap_data = pdata->keymap_data;
	392	if (!keymap_data) {
	393	dev_err(&pdev->dev, "no keymap data defined\n");
	394	return -EINVAL;
	395	}
	396
	397	if (!pdata->rows \|\| pdata->rows > SAMSUNG_MAX_ROWS)
	398	return -EINVAL;
	399
	400	if (!pdata->cols \|\| pdata->cols > SAMSUNG_MAX_COLS)
	401	return -EINVAL;
	402
	403	/* initialize the gpio */
	404	if (pdata->cfg_gpio)
	405	pdata->cfg_gpio(pdata->rows, pdata->cols);
	406
	407	row_shift = get_count_order(pdata->cols);
	408	keymap_size = (pdata->rows << row_shift) * sizeof(keypad->keycodes[0]);
	409
	410	keypad = kzalloc(sizeof(*keypad) + keymap_size, GFP_KERNEL);
	411	input_dev = input_allocate_device();
	412	if (!keypad \|\| !input_dev) {
	413	error = -ENOMEM;
	414	goto err_free_mem;
	415	}
	416
	417	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	418	if (!res) {
	419	error = -ENODEV;
	420	goto err_free_mem;
	421	}
	422
	423	keypad->base = ioremap(res->start, resource_size(res));
	424	if (!keypad->base) {
	425	error = -EBUSY;
	426	goto err_free_mem;
	427	}
	428
	429	keypad->clk = clk_get(&pdev->dev, "keypad");
	430	if (IS_ERR(keypad->clk)) {
	431	dev_err(&pdev->dev, "failed to get keypad clk\n");
	432	error = PTR_ERR(keypad->clk);
	433	goto err_unmap_base;
	434	}
	435
	436	keypad->input_dev = input_dev;
48c98b1b	437	keypad->pdev = pdev;
0fffed27 JS	438	keypad->row_shift = row_shift;
	439	keypad->rows = pdata->rows;
	440	keypad->cols = pdata->cols;
48c98b1b	441	keypad->stopped = true;
0fffed27 JS	442	init_waitqueue_head(&keypad->wait);
0fffed27 JS	443
b3d6ac3e TA	444	if (pdev->dev.of_node) {
	445	#ifdef CONFIG_OF
	446	samsung_keypad_parse_dt_gpio(&pdev->dev, keypad);
	447	keypad->type = of_device_is_compatible(pdev->dev.of_node,
	448	"samsung,s5pv210-keypad");
	449	#endif
	450	} else {
	451	keypad->type = platform_get_device_id(pdev)->driver_data;
	452	}
	453
0fffed27 JS	454	input_dev->name = pdev->name;
	455	input_dev->id.bustype = BUS_HOST;
	456	input_dev->dev.parent = &pdev->dev;
	457	input_set_drvdata(input_dev, keypad);
	458
	459	input_dev->open = samsung_keypad_open;
	460	input_dev->close = samsung_keypad_close;
	461
	462	input_dev->evbit[0] = BIT_MASK(EV_KEY);
	463	if (!pdata->no_autorepeat)
	464	input_dev->evbit[0] \|= BIT_MASK(EV_REP);
	465
	466	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
	467
	468	input_dev->keycode = keypad->keycodes;
	469	input_dev->keycodesize = sizeof(keypad->keycodes[0]);
	470	input_dev->keycodemax = pdata->rows << row_shift;
	471
	472	matrix_keypad_build_keymap(keymap_data, row_shift,
	473	input_dev->keycode, input_dev->keybit);
	474
	475	keypad->irq = platform_get_irq(pdev, 0);
	476	if (keypad->irq < 0) {
	477	error = keypad->irq;
	478	goto err_put_clk;
	479	}
	480
	481	error = request_threaded_irq(keypad->irq, NULL, samsung_keypad_irq,
	482	IRQF_ONESHOT, dev_name(&pdev->dev), keypad);
	483	if (error) {
	484	dev_err(&pdev->dev, "failed to register keypad interrupt\n");
	485	goto err_put_clk;
	486	}
	487
48c98b1b MB	488	device_init_wakeup(&pdev->dev, pdata->wakeup);
	489	platform_set_drvdata(pdev, keypad);
	490	pm_runtime_enable(&pdev->dev);
	491
0fffed27 JS	492	error = input_register_device(keypad->input_dev);
	493	if (error)
	494	goto err_free_irq;
	495
b3d6ac3e TA	496	if (pdev->dev.of_node) {
	497	devm_kfree(&pdev->dev, (void *)pdata->keymap_data->keymap);
	498	devm_kfree(&pdev->dev, (void *)pdata->keymap_data);
	499	devm_kfree(&pdev->dev, (void *)pdata);
	500	}
0fffed27 JS	501	return 0;
	502
	503	err_free_irq:
	504	free_irq(keypad->irq, keypad);
48c98b1b MB	505	pm_runtime_disable(&pdev->dev);
	506	device_init_wakeup(&pdev->dev, 0);
	507	platform_set_drvdata(pdev, NULL);
0fffed27 JS	508	err_put_clk:
0fffed27 JS	509	clk_put(keypad->clk);
b3d6ac3e	510	samsung_keypad_dt_gpio_free(keypad);
0fffed27 JS	511	err_unmap_base:
	512	iounmap(keypad->base);
	513	err_free_mem:
	514	input_free_device(input_dev);
	515	kfree(keypad);
	516
	517	return error;
	518	}
	519
	520	static int __devexit samsung_keypad_remove(struct platform_device *pdev)
	521	{
	522	struct samsung_keypad *keypad = platform_get_drvdata(pdev);
	523
48c98b1b	524	pm_runtime_disable(&pdev->dev);
0fffed27 JS	525	device_init_wakeup(&pdev->dev, 0);
	526	platform_set_drvdata(pdev, NULL);
	527
	528	input_unregister_device(keypad->input_dev);
	529
	530	/*
	531	* It is safe to free IRQ after unregistering device because
	532	* samsung_keypad_close will shut off interrupts.
	533	*/
	534	free_irq(keypad->irq, keypad);
	535
	536	clk_put(keypad->clk);
b3d6ac3e	537	samsung_keypad_dt_gpio_free(keypad);
0fffed27 JS	538
	539	iounmap(keypad->base);
	540	kfree(keypad);
	541
	542	return 0;
	543	}
	544
48c98b1b MB	545	#ifdef CONFIG_PM_RUNTIME
	546	static int samsung_keypad_runtime_suspend(struct device *dev)
	547	{
	548	struct platform_device *pdev = to_platform_device(dev);
	549	struct samsung_keypad *keypad = platform_get_drvdata(pdev);
	550	unsigned int val;
	551	int error;
	552
	553	if (keypad->stopped)
	554	return 0;
	555
	556	/* This may fail on some SoCs due to lack of controller support */
	557	error = enable_irq_wake(keypad->irq);
	558	if (!error)
	559	keypad->wake_enabled = true;
	560
	561	val = readl(keypad->base + SAMSUNG_KEYIFCON);
	562	val \|= SAMSUNG_KEYIFCON_WAKEUPEN;
	563	writel(val, keypad->base + SAMSUNG_KEYIFCON);
	564
	565	clk_disable(keypad->clk);
	566
	567	return 0;
	568	}
	569
	570	static int samsung_keypad_runtime_resume(struct device *dev)
	571	{
	572	struct platform_device *pdev = to_platform_device(dev);
	573	struct samsung_keypad *keypad = platform_get_drvdata(pdev);
	574	unsigned int val;
	575
	576	if (keypad->stopped)
	577	return 0;
	578
	579	clk_enable(keypad->clk);
	580
	581	val = readl(keypad->base + SAMSUNG_KEYIFCON);
	582	val &= ~SAMSUNG_KEYIFCON_WAKEUPEN;
	583	writel(val, keypad->base + SAMSUNG_KEYIFCON);
	584
	585	if (keypad->wake_enabled)
	586	disable_irq_wake(keypad->irq);
	587
	588	return 0;
	589	}
	590	#endif
	591
400bf299	592	#ifdef CONFIG_PM_SLEEP
0fffed27 JS	593	static void samsung_keypad_toggle_wakeup(struct samsung_keypad *keypad,
	594	bool enable)
	595	{
0fffed27 JS	596	unsigned int val;
	597
	598	clk_enable(keypad->clk);
	599
	600	val = readl(keypad->base + SAMSUNG_KEYIFCON);
	601	if (enable) {
	602	val \|= SAMSUNG_KEYIFCON_WAKEUPEN;
48c98b1b	603	if (device_may_wakeup(&keypad->pdev->dev))
0fffed27 JS	604	enable_irq_wake(keypad->irq);
	605	} else {
	606	val &= ~SAMSUNG_KEYIFCON_WAKEUPEN;
48c98b1b	607	if (device_may_wakeup(&keypad->pdev->dev))
0fffed27 JS	608	disable_irq_wake(keypad->irq);
	609	}
	610	writel(val, keypad->base + SAMSUNG_KEYIFCON);
	611
	612	clk_disable(keypad->clk);
	613	}
	614
	615	static int samsung_keypad_suspend(struct device *dev)
	616	{
	617	struct platform_device *pdev = to_platform_device(dev);
	618	struct samsung_keypad *keypad = platform_get_drvdata(pdev);
	619	struct input_dev *input_dev = keypad->input_dev;
	620
	621	mutex_lock(&input_dev->mutex);
	622
	623	if (input_dev->users)
	624	samsung_keypad_stop(keypad);
	625
	626	samsung_keypad_toggle_wakeup(keypad, true);
	627
	628	mutex_unlock(&input_dev->mutex);
	629
	630	return 0;
	631	}
	632
	633	static int samsung_keypad_resume(struct device *dev)
	634	{
	635	struct platform_device *pdev = to_platform_device(dev);
	636	struct samsung_keypad *keypad = platform_get_drvdata(pdev);
	637	struct input_dev *input_dev = keypad->input_dev;
	638
	639	mutex_lock(&input_dev->mutex);
	640
	641	samsung_keypad_toggle_wakeup(keypad, false);
	642
	643	if (input_dev->users)
	644	samsung_keypad_start(keypad);
	645
	646	mutex_unlock(&input_dev->mutex);
	647
	648	return 0;
	649	}
0fffed27	650	#endif
0fffed27 JS	651
0fffed27 JS	652	static const struct dev_pm_ops samsung_keypad_pm_ops = {
48c98b1b MB	653	SET_SYSTEM_SLEEP_PM_OPS(samsung_keypad_suspend, samsung_keypad_resume)
	654	SET_RUNTIME_PM_OPS(samsung_keypad_runtime_suspend,
	655	samsung_keypad_runtime_resume, NULL)
0fffed27	656	};
0fffed27	657
b3d6ac3e TA	658	#ifdef CONFIG_OF
	659	static const struct of_device_id samsung_keypad_dt_match[] = {
	660	{ .compatible = "samsung,s3c6410-keypad" },
	661	{ .compatible = "samsung,s5pv210-keypad" },
	662	{},
	663	};
	664	MODULE_DEVICE_TABLE(of, samsung_keypad_dt_match);
	665	#else
	666	#define samsung_keypad_dt_match NULL
	667	#endif
	668
0fffed27 JS	669	static struct platform_device_id samsung_keypad_driver_ids[] = {
	670	{
	671	.name = "samsung-keypad",
	672	.driver_data = KEYPAD_TYPE_SAMSUNG,
	673	}, {
	674	.name = "s5pv210-keypad",
	675	.driver_data = KEYPAD_TYPE_S5PV210,
	676	},
	677	{ },
	678	};
	679	MODULE_DEVICE_TABLE(platform, samsung_keypad_driver_ids);
	680
	681	static struct platform_driver samsung_keypad_driver = {
	682	.probe = samsung_keypad_probe,
	683	.remove = __devexit_p(samsung_keypad_remove),
	684	.driver = {
	685	.name = "samsung-keypad",
	686	.owner = THIS_MODULE,
b3d6ac3e	687	.of_match_table = samsung_keypad_dt_match,
0fffed27	688	.pm = &samsung_keypad_pm_ops,
0fffed27 JS	689	},
	690	.id_table = samsung_keypad_driver_ids,
	691	};
5146c84f	692	module_platform_driver(samsung_keypad_driver);
0fffed27 JS	693
	694	MODULE_DESCRIPTION("Samsung keypad driver");
	695	MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
	696	MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>");
	697	MODULE_LICENSE("GPL");