[linux-2.6-block.git] / drivers / input / keyboard / sh_keysc.c

/*
 * SuperH KEYSC Keypad Driver
 *
 * Copyright (C) 2008 Magnus Damm
 *
 * Based on gpio_keys.c, Copyright 2005 Phil Blundell
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/input/sh_keysc.h>
#include <linux/bitmap.h>
#include <linux/pm_runtime.h>
#include <linux/io.h>
#include <linux/slab.h>

static const struct {
	unsigned char kymd, keyout, keyin;
} sh_keysc_mode[] = {
	[SH_KEYSC_MODE_1] = { 0, 6, 5 },
	[SH_KEYSC_MODE_2] = { 1, 5, 6 },
	[SH_KEYSC_MODE_3] = { 2, 4, 7 },
	[SH_KEYSC_MODE_4] = { 3, 6, 6 },
	[SH_KEYSC_MODE_5] = { 4, 6, 7 },
	[SH_KEYSC_MODE_6] = { 5, 8, 8 },
};

struct sh_keysc_priv {
	void __iomem *iomem_base;
	DECLARE_BITMAP(last_keys, SH_KEYSC_MAXKEYS);
	struct input_dev *input;
	struct sh_keysc_info pdata;
};

#define KYCR1 0
#define KYCR2 1
#define KYINDR 2
#define KYOUTDR 3

#define KYCR2_IRQ_LEVEL    0x10
#define KYCR2_IRQ_DISABLED 0x00

static unsigned long sh_keysc_read(struct sh_keysc_priv *p, int reg_nr)
{
	return ioread16(p->iomem_base + (reg_nr << 2));
}

static void sh_keysc_write(struct sh_keysc_priv *p, int reg_nr,
			   unsigned long value)
{
	iowrite16(value, p->iomem_base + (reg_nr << 2));
}

static void sh_keysc_level_mode(struct sh_keysc_priv *p,
				unsigned long keys_set)
{
	struct sh_keysc_info *pdata = &p->pdata;

	sh_keysc_write(p, KYOUTDR, 0);
	sh_keysc_write(p, KYCR2, KYCR2_IRQ_LEVEL | (keys_set << 8));

	if (pdata->kycr2_delay)
		udelay(pdata->kycr2_delay);
}

static void sh_keysc_map_dbg(struct device *dev, unsigned long *map,
			     const char *str)
{
	int k;

	for (k = 0; k < BITS_TO_LONGS(SH_KEYSC_MAXKEYS); k++)
		dev_dbg(dev, "%s[%d] 0x%lx\n", str, k, map[k]);
}

static irqreturn_t sh_keysc_isr(int irq, void *dev_id)
{
	struct platform_device *pdev = dev_id;
	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
	struct sh_keysc_info *pdata = &priv->pdata;
	int keyout_nr = sh_keysc_mode[pdata->mode].keyout;
	int keyin_nr = sh_keysc_mode[pdata->mode].keyin;
	DECLARE_BITMAP(keys, SH_KEYSC_MAXKEYS);
	DECLARE_BITMAP(keys0, SH_KEYSC_MAXKEYS);
	DECLARE_BITMAP(keys1, SH_KEYSC_MAXKEYS);
	unsigned char keyin_set, tmp;
	int i, k, n;

	dev_dbg(&pdev->dev, "isr!\n");

	bitmap_fill(keys1, SH_KEYSC_MAXKEYS);
	bitmap_zero(keys0, SH_KEYSC_MAXKEYS);

	do {
		bitmap_zero(keys, SH_KEYSC_MAXKEYS);
		keyin_set = 0;

		sh_keysc_write(priv, KYCR2, KYCR2_IRQ_DISABLED);

		for (i = 0; i < keyout_nr; i++) {
			n = keyin_nr * i;

			/* drive one KEYOUT pin low, read KEYIN pins */
			sh_keysc_write(priv, KYOUTDR, 0xffff ^ (3 << (i * 2)));
			udelay(pdata->delay);
			tmp = sh_keysc_read(priv, KYINDR);

			/* set bit if key press has been detected */
			for (k = 0; k < keyin_nr; k++) {
				if (tmp & (1 << k))
					__set_bit(n + k, keys);
			}

			/* keep track of which KEYIN bits that have been set */
			keyin_set |= tmp ^ ((1 << keyin_nr) - 1);
		}

		sh_keysc_level_mode(priv, keyin_set);

		bitmap_complement(keys, keys, SH_KEYSC_MAXKEYS);
		bitmap_and(keys1, keys1, keys, SH_KEYSC_MAXKEYS);
		bitmap_or(keys0, keys0, keys, SH_KEYSC_MAXKEYS);

		sh_keysc_map_dbg(&pdev->dev, keys, "keys");

	} while (sh_keysc_read(priv, KYCR2) & 0x01);

	sh_keysc_map_dbg(&pdev->dev, priv->last_keys, "last_keys");
	sh_keysc_map_dbg(&pdev->dev, keys0, "keys0");
	sh_keysc_map_dbg(&pdev->dev, keys1, "keys1");

	for (i = 0; i < SH_KEYSC_MAXKEYS; i++) {
		k = pdata->keycodes[i];
		if (!k)
			continue;

		if (test_bit(i, keys0) == test_bit(i, priv->last_keys))
			continue;

		if (test_bit(i, keys1) || test_bit(i, keys0)) {
			input_event(priv->input, EV_KEY, k, 1);
			__set_bit(i, priv->last_keys);
		}

		if (!test_bit(i, keys1)) {
			input_event(priv->input, EV_KEY, k, 0);
			__clear_bit(i, priv->last_keys);
		}

	}
	input_sync(priv->input);

	return IRQ_HANDLED;
}

static int sh_keysc_probe(struct platform_device *pdev)
{
	struct sh_keysc_priv *priv;
	struct sh_keysc_info *pdata;
	struct resource *res;
	struct input_dev *input;
	int i;
	int irq, error;

	if (!dev_get_platdata(&pdev->dev)) {
		dev_err(&pdev->dev, "no platform data defined\n");
		error = -EINVAL;
		goto err0;
	}

	error = -ENXIO;
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
		dev_err(&pdev->dev, "failed to get I/O memory\n");
		goto err0;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(&pdev->dev, "failed to get irq\n");
		goto err0;
	}

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (priv == NULL) {
		dev_err(&pdev->dev, "failed to allocate driver data\n");
		error = -ENOMEM;
		goto err0;
	}

	platform_set_drvdata(pdev, priv);
	memcpy(&priv->pdata, dev_get_platdata(&pdev->dev), sizeof(priv->pdata));
	pdata = &priv->pdata;

	priv->iomem_base = ioremap_nocache(res->start, resource_size(res));
	if (priv->iomem_base == NULL) {
		dev_err(&pdev->dev, "failed to remap I/O memory\n");
		error = -ENXIO;
		goto err1;
	}

	priv->input = input_allocate_device();
	if (!priv->input) {
		dev_err(&pdev->dev, "failed to allocate input device\n");
		error = -ENOMEM;
		goto err2;
	}

	input = priv->input;
	input->evbit[0] = BIT_MASK(EV_KEY);

	input->name = pdev->name;
	input->phys = "sh-keysc-keys/input0";
	input->dev.parent = &pdev->dev;

	input->id.bustype = BUS_HOST;
	input->id.vendor = 0x0001;
	input->id.product = 0x0001;
	input->id.version = 0x0100;

	input->keycode = pdata->keycodes;
	input->keycodesize = sizeof(pdata->keycodes[0]);
	input->keycodemax = ARRAY_SIZE(pdata->keycodes);

	error = request_threaded_irq(irq, NULL, sh_keysc_isr, IRQF_ONESHOT,
				     dev_name(&pdev->dev), pdev);
	if (error) {
		dev_err(&pdev->dev, "failed to request IRQ\n");
		goto err3;
	}

	for (i = 0; i < SH_KEYSC_MAXKEYS; i++)
		__set_bit(pdata->keycodes[i], input->keybit);
	__clear_bit(KEY_RESERVED, input->keybit);

	error = input_register_device(input);
	if (error) {
		dev_err(&pdev->dev, "failed to register input device\n");
		goto err4;
	}

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

	sh_keysc_write(priv, KYCR1, (sh_keysc_mode[pdata->mode].kymd << 8) |
		       pdata->scan_timing);
	sh_keysc_level_mode(priv, 0);

	device_init_wakeup(&pdev->dev, 1);

	return 0;

 err4:
	free_irq(irq, pdev);
 err3:
	input_free_device(input);
 err2:
	iounmap(priv->iomem_base);
 err1:
	kfree(priv);
 err0:
	return error;
}

static int sh_keysc_remove(struct platform_device *pdev)
{
	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);

	sh_keysc_write(priv, KYCR2, KYCR2_IRQ_DISABLED);

	input_unregister_device(priv->input);
	free_irq(platform_get_irq(pdev, 0), pdev);
	iounmap(priv->iomem_base);

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

	kfree(priv);

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int sh_keysc_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
	int irq = platform_get_irq(pdev, 0);
	unsigned short value;

	value = sh_keysc_read(priv, KYCR1);

	if (device_may_wakeup(dev)) {
		sh_keysc_write(priv, KYCR1, value | 0x80);
		enable_irq_wake(irq);
	} else {
		sh_keysc_write(priv, KYCR1, value & ~0x80);
		pm_runtime_put_sync(dev);
	}

	return 0;
}

static int sh_keysc_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	int irq = platform_get_irq(pdev, 0);

	if (device_may_wakeup(dev))
		disable_irq_wake(irq);
	else
		pm_runtime_get_sync(dev);

	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(sh_keysc_dev_pm_ops,
			 sh_keysc_suspend, sh_keysc_resume);

static struct platform_driver sh_keysc_device_driver = {
	.probe		= sh_keysc_probe,
	.remove		= sh_keysc_remove,
	.driver		= {
		.name	= "sh_keysc",
		.pm	= &sh_keysc_dev_pm_ops,
	}
};
module_platform_driver(sh_keysc_device_driver);

MODULE_AUTHOR("Magnus Damm");
MODULE_DESCRIPTION("SuperH KEYSC Keypad Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
795e6bf3 MD	1	/*
	2	* SuperH KEYSC Keypad Driver
	3	*
	4	* Copyright (C) 2008 Magnus Damm
	5	*
	6	* Based on gpio_keys.c, Copyright 2005 Phil Blundell
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/kernel.h>
	14	#include <linux/module.h>
795e6bf3 MD	15	#include <linux/interrupt.h>
	16	#include <linux/irq.h>
	17	#include <linux/delay.h>
	18	#include <linux/platform_device.h>
	19	#include <linux/input.h>
fc1d003d	20	#include <linux/input/sh_keysc.h>
324e5ade	21	#include <linux/bitmap.h>
b6d2a3e6	22	#include <linux/pm_runtime.h>
795e6bf3	23	#include <linux/io.h>
5a0e3ad6	24	#include <linux/slab.h>
795e6bf3	25
795e6bf3 MD	26	static const struct {
	27	unsigned char kymd, keyout, keyin;
	28	} sh_keysc_mode[] = {
	29	[SH_KEYSC_MODE_1] = { 0, 6, 5 },
	30	[SH_KEYSC_MODE_2] = { 1, 5, 6 },
	31	[SH_KEYSC_MODE_3] = { 2, 4, 7 },
3bf12763 MD	32	[SH_KEYSC_MODE_4] = { 3, 6, 6 },
3bf12763 MD	33	[SH_KEYSC_MODE_5] = { 4, 6, 7 },
cca23d0b	34	[SH_KEYSC_MODE_6] = { 5, 8, 8 },
795e6bf3 MD	35	};
	36
	37	struct sh_keysc_priv {
	38	void __iomem *iomem_base;
324e5ade	39	DECLARE_BITMAP(last_keys, SH_KEYSC_MAXKEYS);
795e6bf3 MD	40	struct input_dev *input;
	41	struct sh_keysc_info pdata;
	42	};
	43
2b14a808 MD	44	#define KYCR1 0
	45	#define KYCR2 1
	46	#define KYINDR 2
	47	#define KYOUTDR 3
	48
	49	#define KYCR2_IRQ_LEVEL 0x10
	50	#define KYCR2_IRQ_DISABLED 0x00
	51
	52	static unsigned long sh_keysc_read(struct sh_keysc_priv *p, int reg_nr)
	53	{
	54	return ioread16(p->iomem_base + (reg_nr << 2));
	55	}
	56
	57	static void sh_keysc_write(struct sh_keysc_priv *p, int reg_nr,
	58	unsigned long value)
	59	{
	60	iowrite16(value, p->iomem_base + (reg_nr << 2));
	61	}
	62
	63	static void sh_keysc_level_mode(struct sh_keysc_priv *p,
	64	unsigned long keys_set)
	65	{
	66	struct sh_keysc_info *pdata = &p->pdata;
	67
	68	sh_keysc_write(p, KYOUTDR, 0);
	69	sh_keysc_write(p, KYCR2, KYCR2_IRQ_LEVEL \| (keys_set << 8));
	70
	71	if (pdata->kycr2_delay)
	72	udelay(pdata->kycr2_delay);
	73	}
	74
324e5ade MD	75	static void sh_keysc_map_dbg(struct device dev, unsigned long map,
	76	const char *str)
	77	{
	78	int k;
	79
	80	for (k = 0; k < BITS_TO_LONGS(SH_KEYSC_MAXKEYS); k++)
	81	dev_dbg(dev, "%s[%d] 0x%lx\n", str, k, map[k]);
	82	}
	83
795e6bf3 MD	84	static irqreturn_t sh_keysc_isr(int irq, void *dev_id)
	85	{
	86	struct platform_device *pdev = dev_id;
	87	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
	88	struct sh_keysc_info *pdata = &priv->pdata;
324e5ade MD	89	int keyout_nr = sh_keysc_mode[pdata->mode].keyout;
	90	int keyin_nr = sh_keysc_mode[pdata->mode].keyin;
	91	DECLARE_BITMAP(keys, SH_KEYSC_MAXKEYS);
	92	DECLARE_BITMAP(keys0, SH_KEYSC_MAXKEYS);
	93	DECLARE_BITMAP(keys1, SH_KEYSC_MAXKEYS);
795e6bf3	94	unsigned char keyin_set, tmp;
324e5ade	95	int i, k, n;
795e6bf3 MD	96
	97	dev_dbg(&pdev->dev, "isr!\n");
	98
324e5ade MD	99	bitmap_fill(keys1, SH_KEYSC_MAXKEYS);
324e5ade MD	100	bitmap_zero(keys0, SH_KEYSC_MAXKEYS);
795e6bf3 MD	101
795e6bf3 MD	102	do {
324e5ade	103	bitmap_zero(keys, SH_KEYSC_MAXKEYS);
795e6bf3 MD	104	keyin_set = 0;
795e6bf3 MD	105
2b14a808	106	sh_keysc_write(priv, KYCR2, KYCR2_IRQ_DISABLED);
795e6bf3	107
324e5ade MD	108	for (i = 0; i < keyout_nr; i++) {
	109	n = keyin_nr * i;
	110
	111	/* drive one KEYOUT pin low, read KEYIN pins */
8f8be243	112	sh_keysc_write(priv, KYOUTDR, 0xffff ^ (3 << (i * 2)));
795e6bf3	113	udelay(pdata->delay);
2b14a808 MD	114	tmp = sh_keysc_read(priv, KYINDR);
2b14a808 MD	115
324e5ade MD	116	/* set bit if key press has been detected */
	117	for (k = 0; k < keyin_nr; k++) {
	118	if (tmp & (1 << k))
	119	__set_bit(n + k, keys);
	120	}
	121
	122	/* keep track of which KEYIN bits that have been set */
	123	keyin_set \|= tmp ^ ((1 << keyin_nr) - 1);
795e6bf3 MD	124	}
795e6bf3 MD	125
2b14a808	126	sh_keysc_level_mode(priv, keyin_set);
1f85d381	127
324e5ade MD	128	bitmap_complement(keys, keys, SH_KEYSC_MAXKEYS);
	129	bitmap_and(keys1, keys1, keys, SH_KEYSC_MAXKEYS);
	130	bitmap_or(keys0, keys0, keys, SH_KEYSC_MAXKEYS);
795e6bf3	131
324e5ade	132	sh_keysc_map_dbg(&pdev->dev, keys, "keys");
795e6bf3	133
2b14a808	134	} while (sh_keysc_read(priv, KYCR2) & 0x01);
795e6bf3	135
324e5ade MD	136	sh_keysc_map_dbg(&pdev->dev, priv->last_keys, "last_keys");
	137	sh_keysc_map_dbg(&pdev->dev, keys0, "keys0");
	138	sh_keysc_map_dbg(&pdev->dev, keys1, "keys1");
795e6bf3 MD	139
	140	for (i = 0; i < SH_KEYSC_MAXKEYS; i++) {
	141	k = pdata->keycodes[i];
	142	if (!k)
	143	continue;
	144
324e5ade	145	if (test_bit(i, keys0) == test_bit(i, priv->last_keys))
795e6bf3 MD	146	continue;
795e6bf3 MD	147
324e5ade	148	if (test_bit(i, keys1) \|\| test_bit(i, keys0)) {
795e6bf3	149	input_event(priv->input, EV_KEY, k, 1);
324e5ade	150	__set_bit(i, priv->last_keys);
795e6bf3 MD	151	}
795e6bf3 MD	152
324e5ade	153	if (!test_bit(i, keys1)) {
795e6bf3	154	input_event(priv->input, EV_KEY, k, 0);
324e5ade	155	__clear_bit(i, priv->last_keys);
795e6bf3 MD	156	}
	157
	158	}
	159	input_sync(priv->input);
	160
	161	return IRQ_HANDLED;
	162	}
	163
5298cc4c	164	static int sh_keysc_probe(struct platform_device *pdev)
795e6bf3 MD	165	{
	166	struct sh_keysc_priv *priv;
	167	struct sh_keysc_info *pdata;
	168	struct resource *res;
	169	struct input_dev *input;
24d01c06	170	int i;
795e6bf3 MD	171	int irq, error;
795e6bf3 MD	172
c838cb3d	173	if (!dev_get_platdata(&pdev->dev)) {
795e6bf3 MD	174	dev_err(&pdev->dev, "no platform data defined\n");
	175	error = -EINVAL;
	176	goto err0;
	177	}
	178
	179	error = -ENXIO;
	180	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	181	if (res == NULL) {
	182	dev_err(&pdev->dev, "failed to get I/O memory\n");
	183	goto err0;
	184	}
	185
	186	irq = platform_get_irq(pdev, 0);
	187	if (irq < 0) {
	188	dev_err(&pdev->dev, "failed to get irq\n");
	189	goto err0;
	190	}
	191
	192	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	193	if (priv == NULL) {
	194	dev_err(&pdev->dev, "failed to allocate driver data\n");
	195	error = -ENOMEM;
	196	goto err0;
	197	}
	198
	199	platform_set_drvdata(pdev, priv);
c838cb3d	200	memcpy(&priv->pdata, dev_get_platdata(&pdev->dev), sizeof(priv->pdata));
795e6bf3 MD	201	pdata = &priv->pdata;
795e6bf3 MD	202
3bf12763	203	priv->iomem_base = ioremap_nocache(res->start, resource_size(res));
795e6bf3 MD	204	if (priv->iomem_base == NULL) {
	205	dev_err(&pdev->dev, "failed to remap I/O memory\n");
	206	error = -ENXIO;
d3aa43a9	207	goto err1;
795e6bf3 MD	208	}
	209
	210	priv->input = input_allocate_device();
	211	if (!priv->input) {
	212	dev_err(&pdev->dev, "failed to allocate input device\n");
	213	error = -ENOMEM;
b6d2a3e6	214	goto err2;
795e6bf3 MD	215	}
	216
	217	input = priv->input;
	218	input->evbit[0] = BIT_MASK(EV_KEY);
	219
	220	input->name = pdev->name;
	221	input->phys = "sh-keysc-keys/input0";
	222	input->dev.parent = &pdev->dev;
	223
	224	input->id.bustype = BUS_HOST;
	225	input->id.vendor = 0x0001;
	226	input->id.product = 0x0001;
	227	input->id.version = 0x0100;
	228
24d01c06 DT	229	input->keycode = pdata->keycodes;
	230	input->keycodesize = sizeof(pdata->keycodes[0]);
	231	input->keycodemax = ARRAY_SIZE(pdata->keycodes);
	232
2dfb9a85 MD	233	error = request_threaded_irq(irq, NULL, sh_keysc_isr, IRQF_ONESHOT,
2dfb9a85 MD	234	dev_name(&pdev->dev), pdev);
795e6bf3 MD	235	if (error) {
795e6bf3 MD	236	dev_err(&pdev->dev, "failed to request IRQ\n");
b6d2a3e6	237	goto err3;
795e6bf3 MD	238	}
795e6bf3 MD	239
24d01c06 DT	240	for (i = 0; i < SH_KEYSC_MAXKEYS; i++)
	241	__set_bit(pdata->keycodes[i], input->keybit);
	242	__clear_bit(KEY_RESERVED, input->keybit);
795e6bf3 MD	243
	244	error = input_register_device(input);
	245	if (error) {
	246	dev_err(&pdev->dev, "failed to register input device\n");
b6d2a3e6	247	goto err4;
795e6bf3 MD	248	}
795e6bf3 MD	249
b6d2a3e6 MD	250	pm_runtime_enable(&pdev->dev);
b6d2a3e6 MD	251	pm_runtime_get_sync(&pdev->dev);
090d951b	252
2b14a808 MD	253	sh_keysc_write(priv, KYCR1, (sh_keysc_mode[pdata->mode].kymd << 8) \|
	254	pdata->scan_timing);
	255	sh_keysc_level_mode(priv, 0);
a29b99ec MD	256
a29b99ec MD	257	device_init_wakeup(&pdev->dev, 1);
24d01c06	258
795e6bf3	259	return 0;
24d01c06	260
090d951b	261	err4:
b6d2a3e6	262	free_irq(irq, pdev);
090d951b	263	err3:
b6d2a3e6	264	input_free_device(input);
795e6bf3	265	err2:
d3aa43a9	266	iounmap(priv->iomem_base);
795e6bf3	267	err1:
795e6bf3 MD	268	kfree(priv);
	269	err0:
	270	return error;
	271	}
	272
e2619cf7	273	static int sh_keysc_remove(struct platform_device *pdev)
795e6bf3 MD	274	{
795e6bf3 MD	275	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
795e6bf3	276
2b14a808	277	sh_keysc_write(priv, KYCR2, KYCR2_IRQ_DISABLED);
795e6bf3 MD	278
	279	input_unregister_device(priv->input);
	280	free_irq(platform_get_irq(pdev, 0), pdev);
795e6bf3 MD	281	iounmap(priv->iomem_base);
795e6bf3 MD	282
b6d2a3e6 MD	283	pm_runtime_put_sync(&pdev->dev);
b6d2a3e6 MD	284	pm_runtime_disable(&pdev->dev);
090d951b	285
795e6bf3	286	kfree(priv);
24d01c06	287
795e6bf3 MD	288	return 0;
	289	}
	290
cca8edfd	291	#ifdef CONFIG_PM_SLEEP
a29b99ec MD	292	static int sh_keysc_suspend(struct device *dev)
a29b99ec MD	293	{
49976927 MD	294	struct platform_device *pdev = to_platform_device(dev);
49976927 MD	295	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
4ba50df6	296	int irq = platform_get_irq(pdev, 0);
a29b99ec MD	297	unsigned short value;
a29b99ec MD	298
2b14a808	299	value = sh_keysc_read(priv, KYCR1);
795e6bf3	300
4ba50df6	301	if (device_may_wakeup(dev)) {
b6d2a3e6	302	sh_keysc_write(priv, KYCR1, value \| 0x80);
4ba50df6	303	enable_irq_wake(irq);
24d01c06	304	} else {
b6d2a3e6 MD	305	sh_keysc_write(priv, KYCR1, value & ~0x80);
b6d2a3e6 MD	306	pm_runtime_put_sync(dev);
24d01c06	307	}
a29b99ec	308
a29b99ec MD	309	return 0;
	310	}
	311
4ba50df6 MD	312	static int sh_keysc_resume(struct device *dev)
	313	{
	314	struct platform_device *pdev = to_platform_device(dev);
	315	int irq = platform_get_irq(pdev, 0);
	316
	317	if (device_may_wakeup(dev))
	318	disable_irq_wake(irq);
b6d2a3e6 MD	319	else
b6d2a3e6 MD	320	pm_runtime_get_sync(dev);
4ba50df6 MD	321
	322	return 0;
	323	}
9cc7c80b	324	#endif
4ba50df6	325
9cc7c80b DT	326	static SIMPLE_DEV_PM_OPS(sh_keysc_dev_pm_ops,
9cc7c80b DT	327	sh_keysc_suspend, sh_keysc_resume);
795e6bf3	328
12d0cef7	329	static struct platform_driver sh_keysc_device_driver = {
795e6bf3	330	.probe = sh_keysc_probe,
1cb0aa88	331	.remove = sh_keysc_remove,
795e6bf3 MD	332	.driver = {
795e6bf3 MD	333	.name = "sh_keysc",
a29b99ec	334	.pm = &sh_keysc_dev_pm_ops,
795e6bf3 MD	335	}
795e6bf3 MD	336	};
5146c84f	337	module_platform_driver(sh_keysc_device_driver);
795e6bf3 MD	338
	339	MODULE_AUTHOR("Magnus Damm");
	340	MODULE_DESCRIPTION("SuperH KEYSC Keypad Driver");
	341	MODULE_LICENSE("GPL");