[linux-2.6-block.git] / drivers / input / keyboard / mtk-pmic-keys.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2017 MediaTek, Inc.
 *
 * Author: Chen Zhong <chen.zhong@mediatek.com>
 */

#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/mt6323/registers.h>
#include <linux/mfd/mt6397/core.h>
#include <linux/mfd/mt6397/registers.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>

#define MTK_PMIC_PWRKEY_RST_EN_MASK	0x1
#define MTK_PMIC_PWRKEY_RST_EN_SHIFT	6
#define MTK_PMIC_HOMEKEY_RST_EN_MASK	0x1
#define MTK_PMIC_HOMEKEY_RST_EN_SHIFT	5
#define MTK_PMIC_RST_DU_MASK		0x3
#define MTK_PMIC_RST_DU_SHIFT		8

#define MTK_PMIC_PWRKEY_RST		\
	(MTK_PMIC_PWRKEY_RST_EN_MASK << MTK_PMIC_PWRKEY_RST_EN_SHIFT)
#define MTK_PMIC_HOMEKEY_RST		\
	(MTK_PMIC_HOMEKEY_RST_EN_MASK << MTK_PMIC_HOMEKEY_RST_EN_SHIFT)

#define MTK_PMIC_PWRKEY_INDEX	0
#define MTK_PMIC_HOMEKEY_INDEX	1
#define MTK_PMIC_MAX_KEY_COUNT	2

struct mtk_pmic_keys_regs {
	u32 deb_reg;
	u32 deb_mask;
	u32 intsel_reg;
	u32 intsel_mask;
};

#define MTK_PMIC_KEYS_REGS(_deb_reg, _deb_mask,		\
	_intsel_reg, _intsel_mask)			\
{							\
	.deb_reg		= _deb_reg,		\
	.deb_mask		= _deb_mask,		\
	.intsel_reg		= _intsel_reg,		\
	.intsel_mask		= _intsel_mask,		\
}

struct mtk_pmic_regs {
	const struct mtk_pmic_keys_regs keys_regs[MTK_PMIC_MAX_KEY_COUNT];
	u32 pmic_rst_reg;
};

static const struct mtk_pmic_regs mt6397_regs = {
	.keys_regs[MTK_PMIC_PWRKEY_INDEX] =
		MTK_PMIC_KEYS_REGS(MT6397_CHRSTATUS,
		0x8, MT6397_INT_RSV, 0x10),
	.keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
		MTK_PMIC_KEYS_REGS(MT6397_OCSTATUS2,
		0x10, MT6397_INT_RSV, 0x8),
	.pmic_rst_reg = MT6397_TOP_RST_MISC,
};

static const struct mtk_pmic_regs mt6323_regs = {
	.keys_regs[MTK_PMIC_PWRKEY_INDEX] =
		MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS,
		0x2, MT6323_INT_MISC_CON, 0x10),
	.keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
		MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS,
		0x4, MT6323_INT_MISC_CON, 0x8),
	.pmic_rst_reg = MT6323_TOP_RST_MISC,
};

struct mtk_pmic_keys_info {
	struct mtk_pmic_keys *keys;
	const struct mtk_pmic_keys_regs *regs;
	unsigned int keycode;
	int irq;
	bool wakeup:1;
};

struct mtk_pmic_keys {
	struct input_dev *input_dev;
	struct device *dev;
	struct regmap *regmap;
	struct mtk_pmic_keys_info keys[MTK_PMIC_MAX_KEY_COUNT];
};

enum mtk_pmic_keys_lp_mode {
	LP_DISABLE,
	LP_ONEKEY,
	LP_TWOKEY,
};

static void mtk_pmic_keys_lp_reset_setup(struct mtk_pmic_keys *keys,
		u32 pmic_rst_reg)
{
	int ret;
	u32 long_press_mode, long_press_debounce;

	ret = of_property_read_u32(keys->dev->of_node,
		"power-off-time-sec", &long_press_debounce);
	if (ret)
		long_press_debounce = 0;

	regmap_update_bits(keys->regmap, pmic_rst_reg,
			   MTK_PMIC_RST_DU_MASK << MTK_PMIC_RST_DU_SHIFT,
			   long_press_debounce << MTK_PMIC_RST_DU_SHIFT);

	ret = of_property_read_u32(keys->dev->of_node,
		"mediatek,long-press-mode", &long_press_mode);
	if (ret)
		long_press_mode = LP_DISABLE;

	switch (long_press_mode) {
	case LP_ONEKEY:
		regmap_update_bits(keys->regmap, pmic_rst_reg,
				   MTK_PMIC_PWRKEY_RST,
				   MTK_PMIC_PWRKEY_RST);
		regmap_update_bits(keys->regmap, pmic_rst_reg,
				   MTK_PMIC_HOMEKEY_RST,
				   0);
		break;
	case LP_TWOKEY:
		regmap_update_bits(keys->regmap, pmic_rst_reg,
				   MTK_PMIC_PWRKEY_RST,
				   MTK_PMIC_PWRKEY_RST);
		regmap_update_bits(keys->regmap, pmic_rst_reg,
				   MTK_PMIC_HOMEKEY_RST,
				   MTK_PMIC_HOMEKEY_RST);
		break;
	case LP_DISABLE:
		regmap_update_bits(keys->regmap, pmic_rst_reg,
				   MTK_PMIC_PWRKEY_RST,
				   0);
		regmap_update_bits(keys->regmap, pmic_rst_reg,
				   MTK_PMIC_HOMEKEY_RST,
				   0);
		break;
	default:
		break;
	}
}

static irqreturn_t mtk_pmic_keys_irq_handler_thread(int irq, void *data)
{
	struct mtk_pmic_keys_info *info = data;
	u32 key_deb, pressed;

	regmap_read(info->keys->regmap, info->regs->deb_reg, &key_deb);

	key_deb &= info->regs->deb_mask;

	pressed = !key_deb;

	input_report_key(info->keys->input_dev, info->keycode, pressed);
	input_sync(info->keys->input_dev);

	dev_dbg(info->keys->dev, "(%s) key =%d using PMIC\n",
		 pressed ? "pressed" : "released", info->keycode);

	return IRQ_HANDLED;
}

static int mtk_pmic_key_setup(struct mtk_pmic_keys *keys,
		struct mtk_pmic_keys_info *info)
{
	int ret;

	info->keys = keys;

	ret = regmap_update_bits(keys->regmap, info->regs->intsel_reg,
				 info->regs->intsel_mask,
				 info->regs->intsel_mask);
	if (ret < 0)
		return ret;

	ret = devm_request_threaded_irq(keys->dev, info->irq, NULL,
					mtk_pmic_keys_irq_handler_thread,
					IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
					"mtk-pmic-keys", info);
	if (ret) {
		dev_err(keys->dev, "Failed to request IRQ: %d: %d\n",
			info->irq, ret);
		return ret;
	}

	input_set_capability(keys->input_dev, EV_KEY, info->keycode);

	return 0;
}

static int __maybe_unused mtk_pmic_keys_suspend(struct device *dev)
{
	struct mtk_pmic_keys *keys = dev_get_drvdata(dev);
	int index;

	for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
		if (keys->keys[index].wakeup)
			enable_irq_wake(keys->keys[index].irq);
	}

	return 0;
}

static int __maybe_unused mtk_pmic_keys_resume(struct device *dev)
{
	struct mtk_pmic_keys *keys = dev_get_drvdata(dev);
	int index;

	for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
		if (keys->keys[index].wakeup)
			disable_irq_wake(keys->keys[index].irq);
	}

	return 0;
}

static SIMPLE_DEV_PM_OPS(mtk_pmic_keys_pm_ops, mtk_pmic_keys_suspend,
			mtk_pmic_keys_resume);

static const struct of_device_id of_mtk_pmic_keys_match_tbl[] = {
	{
		.compatible = "mediatek,mt6397-keys",
		.data = &mt6397_regs,
	}, {
		.compatible = "mediatek,mt6323-keys",
		.data = &mt6323_regs,
	}, {
		/* sentinel */
	}
};
MODULE_DEVICE_TABLE(of, of_mtk_pmic_keys_match_tbl);

static int mtk_pmic_keys_probe(struct platform_device *pdev)
{
	int error, index = 0;
	unsigned int keycount;
	struct mt6397_chip *pmic_chip = dev_get_drvdata(pdev->dev.parent);
	struct device_node *node = pdev->dev.of_node, *child;
	struct mtk_pmic_keys *keys;
	const struct mtk_pmic_regs *mtk_pmic_regs;
	struct input_dev *input_dev;
	const struct of_device_id *of_id =
		of_match_device(of_mtk_pmic_keys_match_tbl, &pdev->dev);

	keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL);
	if (!keys)
		return -ENOMEM;

	keys->dev = &pdev->dev;
	keys->regmap = pmic_chip->regmap;
	mtk_pmic_regs = of_id->data;

	keys->input_dev = input_dev = devm_input_allocate_device(keys->dev);
	if (!input_dev) {
		dev_err(keys->dev, "input allocate device fail.\n");
		return -ENOMEM;
	}

	input_dev->name = "mtk-pmic-keys";
	input_dev->id.bustype = BUS_HOST;
	input_dev->id.vendor = 0x0001;
	input_dev->id.product = 0x0001;
	input_dev->id.version = 0x0001;

	keycount = of_get_available_child_count(node);
	if (keycount > MTK_PMIC_MAX_KEY_COUNT) {
		dev_err(keys->dev, "too many keys defined (%d)\n", keycount);
		return -EINVAL;
	}

	for_each_child_of_node(node, child) {
		keys->keys[index].regs = &mtk_pmic_regs->keys_regs[index];

		keys->keys[index].irq = platform_get_irq(pdev, index);
		if (keys->keys[index].irq < 0)
			return keys->keys[index].irq;

		error = of_property_read_u32(child,
			"linux,keycodes", &keys->keys[index].keycode);
		if (error) {
			dev_err(keys->dev,
				"failed to read key:%d linux,keycode property: %d\n",
				index, error);
			return error;
		}

		if (of_property_read_bool(child, "wakeup-source"))
			keys->keys[index].wakeup = true;

		error = mtk_pmic_key_setup(keys, &keys->keys[index]);
		if (error)
			return error;

		index++;
	}

	error = input_register_device(input_dev);
	if (error) {
		dev_err(&pdev->dev,
			"register input device failed (%d)\n", error);
		return error;
	}

	mtk_pmic_keys_lp_reset_setup(keys, mtk_pmic_regs->pmic_rst_reg);

	platform_set_drvdata(pdev, keys);

	return 0;
}

static struct platform_driver pmic_keys_pdrv = {
	.probe = mtk_pmic_keys_probe,
	.driver = {
		   .name = "mtk-pmic-keys",
		   .of_match_table = of_mtk_pmic_keys_match_tbl,
		   .pm = &mtk_pmic_keys_pm_ops,
	},
};

module_platform_driver(pmic_keys_pdrv);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Chen Zhong <chen.zhong@mediatek.com>");
MODULE_DESCRIPTION("MTK pmic-keys driver v0.1");
Commit	Line	Data
9c92ab61	1	// SPDX-License-Identifier: GPL-2.0-only
3e9f0b3e CZ	2	/*
	3	* Copyright (C) 2017 MediaTek, Inc.
	4	*
	5	* Author: Chen Zhong <chen.zhong@mediatek.com>
3e9f0b3e CZ	6	*/
3e9f0b3e CZ	7
3e9f0b3e CZ	8	#include <linux/input.h>
3e9f0b3e CZ	9	#include <linux/interrupt.h>
3e9f0b3e	10	#include <linux/kernel.h>
3e9f0b3e	11	#include <linux/mfd/mt6323/registers.h>
3e9f0b3e	12	#include <linux/mfd/mt6397/core.h>
1eb7ea26 Y	13	#include <linux/mfd/mt6397/registers.h>
	14	#include <linux/module.h>
	15	#include <linux/of_device.h>
	16	#include <linux/of.h>
	17	#include <linux/platform_device.h>
	18	#include <linux/regmap.h>
3e9f0b3e CZ	19
	20	#define MTK_PMIC_PWRKEY_RST_EN_MASK 0x1
	21	#define MTK_PMIC_PWRKEY_RST_EN_SHIFT 6
	22	#define MTK_PMIC_HOMEKEY_RST_EN_MASK 0x1
	23	#define MTK_PMIC_HOMEKEY_RST_EN_SHIFT 5
	24	#define MTK_PMIC_RST_DU_MASK 0x3
	25	#define MTK_PMIC_RST_DU_SHIFT 8
	26
	27	#define MTK_PMIC_PWRKEY_RST \
	28	(MTK_PMIC_PWRKEY_RST_EN_MASK << MTK_PMIC_PWRKEY_RST_EN_SHIFT)
	29	#define MTK_PMIC_HOMEKEY_RST \
	30	(MTK_PMIC_HOMEKEY_RST_EN_MASK << MTK_PMIC_HOMEKEY_RST_EN_SHIFT)
	31
	32	#define MTK_PMIC_PWRKEY_INDEX 0
	33	#define MTK_PMIC_HOMEKEY_INDEX 1
	34	#define MTK_PMIC_MAX_KEY_COUNT 2
	35
	36	struct mtk_pmic_keys_regs {
	37	u32 deb_reg;
	38	u32 deb_mask;
	39	u32 intsel_reg;
	40	u32 intsel_mask;
	41	};
	42
	43	#define MTK_PMIC_KEYS_REGS(_deb_reg, _deb_mask, \
	44	_intsel_reg, _intsel_mask) \
	45	{ \
	46	.deb_reg = _deb_reg, \
	47	.deb_mask = _deb_mask, \
	48	.intsel_reg = _intsel_reg, \
	49	.intsel_mask = _intsel_mask, \
	50	}
	51
	52	struct mtk_pmic_regs {
	53	const struct mtk_pmic_keys_regs keys_regs[MTK_PMIC_MAX_KEY_COUNT];
	54	u32 pmic_rst_reg;
	55	};
	56
	57	static const struct mtk_pmic_regs mt6397_regs = {
	58	.keys_regs[MTK_PMIC_PWRKEY_INDEX] =
	59	MTK_PMIC_KEYS_REGS(MT6397_CHRSTATUS,
	60	0x8, MT6397_INT_RSV, 0x10),
	61	.keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
	62	MTK_PMIC_KEYS_REGS(MT6397_OCSTATUS2,
	63	0x10, MT6397_INT_RSV, 0x8),
	64	.pmic_rst_reg = MT6397_TOP_RST_MISC,
	65	};
	66
	67	static const struct mtk_pmic_regs mt6323_regs = {
	68	.keys_regs[MTK_PMIC_PWRKEY_INDEX] =
	69	MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS,
	70	0x2, MT6323_INT_MISC_CON, 0x10),
	71	.keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
	72	MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS,
	73	0x4, MT6323_INT_MISC_CON, 0x8),
	74	.pmic_rst_reg = MT6323_TOP_RST_MISC,
	75	};
	76
	77	struct mtk_pmic_keys_info {
	78	struct mtk_pmic_keys *keys;
	79	const struct mtk_pmic_keys_regs *regs;
	80	unsigned int keycode;
	81	int irq;
	82	bool wakeup:1;
83	};
84
85	struct mtk_pmic_keys {
86	struct input_dev *input_dev;
87	struct device *dev;
88	struct regmap *regmap;
89	struct mtk_pmic_keys_info keys[MTK_PMIC_MAX_KEY_COUNT];
90	};
91
92	enum mtk_pmic_keys_lp_mode {
93	LP_DISABLE,
94	LP_ONEKEY,
95	LP_TWOKEY,
96	};
97
98	static void mtk_pmic_keys_lp_reset_setup(struct mtk_pmic_keys *keys,
99	u32 pmic_rst_reg)
100	{
101	int ret;
102	u32 long_press_mode, long_press_debounce;
103
104	ret = of_property_read_u32(keys->dev->of_node,
105	"power-off-time-sec", &long_press_debounce);
106	if (ret)
107	long_press_debounce = 0;
108
109	regmap_update_bits(keys->regmap, pmic_rst_reg,
110	MTK_PMIC_RST_DU_MASK << MTK_PMIC_RST_DU_SHIFT,
111	long_press_debounce << MTK_PMIC_RST_DU_SHIFT);
112
113	ret = of_property_read_u32(keys->dev->of_node,
114	"mediatek,long-press-mode", &long_press_mode);
115	if (ret)
116	long_press_mode = LP_DISABLE;
117
118	switch (long_press_mode) {
119	case LP_ONEKEY:
120	regmap_update_bits(keys->regmap, pmic_rst_reg,
121	MTK_PMIC_PWRKEY_RST,
122	MTK_PMIC_PWRKEY_RST);
123	regmap_update_bits(keys->regmap, pmic_rst_reg,
124	MTK_PMIC_HOMEKEY_RST,
125	0);
126	break;
127	case LP_TWOKEY:
128	regmap_update_bits(keys->regmap, pmic_rst_reg,
129	MTK_PMIC_PWRKEY_RST,
130	MTK_PMIC_PWRKEY_RST);
131	regmap_update_bits(keys->regmap, pmic_rst_reg,
132	MTK_PMIC_HOMEKEY_RST,
133	MTK_PMIC_HOMEKEY_RST);
134	break;
135	case LP_DISABLE:
136	regmap_update_bits(keys->regmap, pmic_rst_reg,
137	MTK_PMIC_PWRKEY_RST,
138	0);
139	regmap_update_bits(keys->regmap, pmic_rst_reg,
140	MTK_PMIC_HOMEKEY_RST,
141	0);
142	break;
143	default:
144	break;
145	}
146	}
147
148	static irqreturn_t mtk_pmic_keys_irq_handler_thread(int irq, void *data)
149	{
150	struct mtk_pmic_keys_info *info = data;
151	u32 key_deb, pressed;
152
153	regmap_read(info->keys->regmap, info->regs->deb_reg, &key_deb);
154
155	key_deb &= info->regs->deb_mask;
156
157	pressed = !key_deb;
158
159	input_report_key(info->keys->input_dev, info->keycode, pressed);
160	input_sync(info->keys->input_dev);
161
162	dev_dbg(info->keys->dev, "(%s) key =%d using PMIC\n",
163	pressed ? "pressed" : "released", info->keycode);
164
165	return IRQ_HANDLED;
166	}
167
168	static int mtk_pmic_key_setup(struct mtk_pmic_keys *keys,
169	struct mtk_pmic_keys_info *info)
170	{
171	int ret;
172
173	info->keys = keys;
174
175	ret = regmap_update_bits(keys->regmap, info->regs->intsel_reg,
176	info->regs->intsel_mask,
177	info->regs->intsel_mask);
178	if (ret < 0)
179	return ret;
180
181	ret = devm_request_threaded_irq(keys->dev, info->irq, NULL,
182	mtk_pmic_keys_irq_handler_thread,
183	IRQF_ONESHOT \| IRQF_TRIGGER_HIGH,
184	"mtk-pmic-keys", info);
185	if (ret) {
186	dev_err(keys->dev, "Failed to request IRQ: %d: %d\n",
187	info->irq, ret);
188	return ret;
189	}
190
191	input_set_capability(keys->input_dev, EV_KEY, info->keycode);
192
193	return 0;
194	}
195
196	static int __maybe_unused mtk_pmic_keys_suspend(struct device *dev)
197	{
198	struct mtk_pmic_keys *keys = dev_get_drvdata(dev);
199	int index;
200
201	for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
202	if (keys->keys[index].wakeup)
203	enable_irq_wake(keys->keys[index].irq);
204	}
205
206	return 0;
207	}
208
209	static int __maybe_unused mtk_pmic_keys_resume(struct device *dev)
210	{
211	struct mtk_pmic_keys *keys = dev_get_drvdata(dev);
212	int index;
213
214	for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
215	if (keys->keys[index].wakeup)
216	disable_irq_wake(keys->keys[index].irq);
217	}
218
219	return 0;
220	}
221
222	static SIMPLE_DEV_PM_OPS(mtk_pmic_keys_pm_ops, mtk_pmic_keys_suspend,
223	mtk_pmic_keys_resume);
224
225	static const struct of_device_id of_mtk_pmic_keys_match_tbl[] = {
226	{
227	.compatible = "mediatek,mt6397-keys",
228	.data = &mt6397_regs,
229	}, {
230	.compatible = "mediatek,mt6323-keys",
231	.data = &mt6323_regs,
232	}, {
233	/* sentinel */
234	}
235	};
236	MODULE_DEVICE_TABLE(of, of_mtk_pmic_keys_match_tbl);
237
238	static int mtk_pmic_keys_probe(struct platform_device *pdev)
239	{
240	int error, index = 0;
241	unsigned int keycount;
242	struct mt6397_chip *pmic_chip = dev_get_drvdata(pdev->dev.parent);
243	struct device_node node = pdev->dev.of_node, child;
244	struct mtk_pmic_keys *keys;
245	const struct mtk_pmic_regs *mtk_pmic_regs;
246	struct input_dev *input_dev;
247	const struct of_device_id *of_id =
248	of_match_device(of_mtk_pmic_keys_match_tbl, &pdev->dev);
249
250	keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL);
251	if (!keys)
252	return -ENOMEM;
253
254	keys->dev = &pdev->dev;
255	keys->regmap = pmic_chip->regmap;
256	mtk_pmic_regs = of_id->data;
257
258	keys->input_dev = input_dev = devm_input_allocate_device(keys->dev);
259	if (!input_dev) {
260	dev_err(keys->dev, "input allocate device fail.\n");
261	return -ENOMEM;
262	}
263
264	input_dev->name = "mtk-pmic-keys";
265	input_dev->id.bustype = BUS_HOST;
266	input_dev->id.vendor = 0x0001;
267	input_dev->id.product = 0x0001;
268	input_dev->id.version = 0x0001;
269
270	keycount = of_get_available_child_count(node);
271	if (keycount > MTK_PMIC_MAX_KEY_COUNT) {
272	dev_err(keys->dev, "too many keys defined (%d)\n", keycount);
273	return -EINVAL;
274	}
275
276	for_each_child_of_node(node, child) {
277	keys->keys[index].regs = &mtk_pmic_regs->keys_regs[index];
278
279	keys->keys[index].irq = platform_get_irq(pdev, index);
280	if (keys->keys[index].irq < 0)
281	return keys->keys[index].irq;
282
283	error = of_property_read_u32(child,
284	"linux,keycodes", &keys->keys[index].keycode);
285	if (error) {
286	dev_err(keys->dev,
287	"failed to read key:%d linux,keycode property: %d\n",
288	index, error);
289	return error;
290	}
291
292	if (of_property_read_bool(child, "wakeup-source"))
293	keys->keys[index].wakeup = true;
294
295	error = mtk_pmic_key_setup(keys, &keys->keys[index]);
296	if (error)
297	return error;
298
299	index++;
300	}
301
302	error = input_register_device(input_dev);
303	if (error) {
304	dev_err(&pdev->dev,
305	"register input device failed (%d)\n", error);
306	return error;
307	}
308
309	mtk_pmic_keys_lp_reset_setup(keys, mtk_pmic_regs->pmic_rst_reg);
310
311	platform_set_drvdata(pdev, keys);
312
313	return 0;
314	}
315
316	static struct platform_driver pmic_keys_pdrv = {
317	.probe = mtk_pmic_keys_probe,
318	.driver = {
319	.name = "mtk-pmic-keys",
320	.of_match_table = of_mtk_pmic_keys_match_tbl,
321	.pm = &mtk_pmic_keys_pm_ops,
322	},
323	};
324
325	module_platform_driver(pmic_keys_pdrv);
326
327	MODULE_LICENSE("GPL v2");
328	MODULE_AUTHOR("Chen Zhong <chen.zhong@mediatek.com>");
329	MODULE_DESCRIPTION("MTK pmic-keys driver v0.1");