[net-next-2.6.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/clk.h>
#include <linux/io.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 },
};

struct sh_keysc_priv {
	void __iomem *iomem_base;
	struct clk *clk;
	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, 0xfff ^ (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 __devinit sh_keysc_probe(struct platform_device *pdev)
{
	struct sh_keysc_priv *priv;
	struct sh_keysc_info *pdata;
	struct resource *res;
	struct input_dev *input;
	char clk_name[8];
	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;
	}

	snprintf(clk_name, sizeof(clk_name), "keysc%d", pdev->id);
	priv->clk = clk_get(&pdev->dev, clk_name);
	if (IS_ERR(priv->clk)) {
		dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
		error = PTR_ERR(priv->clk);
		goto err2;
	}

	priv->input = input_allocate_device();
	if (!priv->input) {
		dev_err(&pdev->dev, "failed to allocate input device\n");
		error = -ENOMEM;
		goto err3;
	}

	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_irq(irq, sh_keysc_isr, 0, pdev->name, pdev);
	if (error) {
		dev_err(&pdev->dev, "failed to request IRQ\n");
		goto err4;
	}

	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 err5;
	}

	clk_enable(priv->clk);

	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;

 err5:
	free_irq(irq, pdev);
 err4:
	input_free_device(input);
 err3:
	clk_put(priv->clk);
 err2:
	iounmap(priv->iomem_base);
 err1:
	platform_set_drvdata(pdev, NULL);
	kfree(priv);
 err0:
	return error;
}

static int __devexit 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);

	clk_disable(priv->clk);
	clk_put(priv->clk);

	platform_set_drvdata(pdev, NULL);
	kfree(priv);

	return 0;
}

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)) {
		value |= 0x80;
		enable_irq_wake(irq);
	} else {
		value &= ~0x80;
	}

	sh_keysc_write(priv, KYCR1, value);

	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);

	return 0;
}

static const struct dev_pm_ops sh_keysc_dev_pm_ops = {
	.suspend = sh_keysc_suspend,
	.resume = sh_keysc_resume,
};

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

static int __init sh_keysc_init(void)
{
	return platform_driver_register(&sh_keysc_device_driver);
}

static void __exit sh_keysc_exit(void)
{
	platform_driver_unregister(&sh_keysc_device_driver);
}

module_init(sh_keysc_init);
module_exit(sh_keysc_exit);

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>
090d951b	23	#include <linux/clk.h>
795e6bf3	24	#include <linux/io.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 },
795e6bf3 MD	34	};
	35
	36	struct sh_keysc_priv {
	37	void __iomem *iomem_base;
090d951b	38	struct clk *clk;
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 */
2b14a808	112	sh_keysc_write(priv, KYOUTDR, 0xfff ^ (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
795e6bf3 MD	164	static int __devinit sh_keysc_probe(struct platform_device *pdev)
	165	{
	166	struct sh_keysc_priv *priv;
	167	struct sh_keysc_info *pdata;
	168	struct resource *res;
	169	struct input_dev *input;
090d951b	170	char clk_name[8];
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	}
795e6bf3 MD	210
090d951b MD	211	snprintf(clk_name, sizeof(clk_name), "keysc%d", pdev->id);
	212	priv->clk = clk_get(&pdev->dev, clk_name);
	213	if (IS_ERR(priv->clk)) {
	214	dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
	215	error = PTR_ERR(priv->clk);
	216	goto err2;
	217	}
	218
795e6bf3 MD	219	priv->input = input_allocate_device();
	220	if (!priv->input) {
	221	dev_err(&pdev->dev, "failed to allocate input device\n");
	222	error = -ENOMEM;
090d951b	223	goto err3;
795e6bf3 MD	224	}
	225
	226	input = priv->input;
	227	input->evbit[0] = BIT_MASK(EV_KEY);
	228
	229	input->name = pdev->name;
	230	input->phys = "sh-keysc-keys/input0";
	231	input->dev.parent = &pdev->dev;
	232
	233	input->id.bustype = BUS_HOST;
	234	input->id.vendor = 0x0001;
	235	input->id.product = 0x0001;
	236	input->id.version = 0x0100;
	237
24d01c06 DT	238	input->keycode = pdata->keycodes;
	239	input->keycodesize = sizeof(pdata->keycodes[0]);
	240	input->keycodemax = ARRAY_SIZE(pdata->keycodes);
	241
795e6bf3 MD	242	error = request_irq(irq, sh_keysc_isr, 0, pdev->name, pdev);
	243	if (error) {
	244	dev_err(&pdev->dev, "failed to request IRQ\n");
090d951b	245	goto err4;
795e6bf3 MD	246	}
795e6bf3 MD	247
24d01c06 DT	248	for (i = 0; i < SH_KEYSC_MAXKEYS; i++)
	249	__set_bit(pdata->keycodes[i], input->keybit);
	250	__clear_bit(KEY_RESERVED, input->keybit);
795e6bf3 MD	251
	252	error = input_register_device(input);
	253	if (error) {
	254	dev_err(&pdev->dev, "failed to register input device\n");
090d951b	255	goto err5;
795e6bf3 MD	256	}
795e6bf3 MD	257
090d951b MD	258	clk_enable(priv->clk);
090d951b MD	259
2b14a808 MD	260	sh_keysc_write(priv, KYCR1, (sh_keysc_mode[pdata->mode].kymd << 8) \|
	261	pdata->scan_timing);
	262	sh_keysc_level_mode(priv, 0);
a29b99ec MD	263
a29b99ec MD	264	device_init_wakeup(&pdev->dev, 1);
24d01c06	265
795e6bf3	266	return 0;
24d01c06	267
090d951b	268	err5:
d3aa43a9	269	free_irq(irq, pdev);
090d951b	270	err4:
d3aa43a9	271	input_free_device(input);
090d951b MD	272	err3:
090d951b MD	273	clk_put(priv->clk);
795e6bf3	274	err2:
d3aa43a9	275	iounmap(priv->iomem_base);
795e6bf3 MD	276	err1:
	277	platform_set_drvdata(pdev, NULL);
	278	kfree(priv);
	279	err0:
	280	return error;
	281	}
	282
	283	static int __devexit sh_keysc_remove(struct platform_device *pdev)
	284	{
	285	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
795e6bf3	286
2b14a808	287	sh_keysc_write(priv, KYCR2, KYCR2_IRQ_DISABLED);
795e6bf3 MD	288
	289	input_unregister_device(priv->input);
	290	free_irq(platform_get_irq(pdev, 0), pdev);
795e6bf3 MD	291	iounmap(priv->iomem_base);
795e6bf3 MD	292
090d951b MD	293	clk_disable(priv->clk);
	294	clk_put(priv->clk);
	295
795e6bf3 MD	296	platform_set_drvdata(pdev, NULL);
795e6bf3 MD	297	kfree(priv);
24d01c06	298
795e6bf3 MD	299	return 0;
	300	}
	301
a29b99ec MD	302	static int sh_keysc_suspend(struct device *dev)
a29b99ec MD	303	{
49976927 MD	304	struct platform_device *pdev = to_platform_device(dev);
49976927 MD	305	struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
4ba50df6	306	int irq = platform_get_irq(pdev, 0);
a29b99ec MD	307	unsigned short value;
a29b99ec MD	308
2b14a808	309	value = sh_keysc_read(priv, KYCR1);
795e6bf3	310
4ba50df6	311	if (device_may_wakeup(dev)) {
a29b99ec	312	value \|= 0x80;
4ba50df6	313	enable_irq_wake(irq);
24d01c06	314	} else {
a29b99ec	315	value &= ~0x80;
24d01c06	316	}
a29b99ec	317
2b14a808	318	sh_keysc_write(priv, KYCR1, value);
24d01c06	319
a29b99ec MD	320	return 0;
	321	}
	322
4ba50df6 MD	323	static int sh_keysc_resume(struct device *dev)
	324	{
	325	struct platform_device *pdev = to_platform_device(dev);
	326	int irq = platform_get_irq(pdev, 0);
	327
	328	if (device_may_wakeup(dev))
	329	disable_irq_wake(irq);
	330
	331	return 0;
	332	}
	333
47145210	334	static const struct dev_pm_ops sh_keysc_dev_pm_ops = {
a29b99ec	335	.suspend = sh_keysc_suspend,
4ba50df6	336	.resume = sh_keysc_resume,
a29b99ec	337	};
795e6bf3 MD	338
	339	struct platform_driver sh_keysc_device_driver = {
	340	.probe = sh_keysc_probe,
	341	.remove = __devexit_p(sh_keysc_remove),
795e6bf3 MD	342	.driver = {
795e6bf3 MD	343	.name = "sh_keysc",
a29b99ec	344	.pm = &sh_keysc_dev_pm_ops,
795e6bf3 MD	345	}
	346	};
	347
	348	static int __init sh_keysc_init(void)
	349	{
	350	return platform_driver_register(&sh_keysc_device_driver);
	351	}
	352
	353	static void __exit sh_keysc_exit(void)
	354	{
	355	platform_driver_unregister(&sh_keysc_device_driver);
	356	}
	357
	358	module_init(sh_keysc_init);
	359	module_exit(sh_keysc_exit);
	360
	361	MODULE_AUTHOR("Magnus Damm");
	362	MODULE_DESCRIPTION("SuperH KEYSC Keypad Driver");
	363	MODULE_LICENSE("GPL");