[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/init.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 (!pdev->dev.platform_data) {
		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, pdev->dev.platform_data, 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:
	platform_set_drvdata(pdev, NULL);
	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);

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