[linux-2.6-block.git] / drivers / input / misc / axp20x-pek.c

/*
 * axp20x power button driver.
 *
 * Copyright (C) 2013 Carlo Caione <carlo@caione.org>
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License. See the file "COPYING" in the main directory of this
 * archive for more details.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 */

#include <linux/acpi.h>
#include <linux/errno.h>
#include <linux/irq.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/axp20x.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>

#define AXP20X_PEK_STARTUP_MASK		(0xc0)
#define AXP20X_PEK_SHUTDOWN_MASK	(0x03)

struct axp20x_info {
	const struct axp20x_time *startup_time;
	unsigned int startup_mask;
	const struct axp20x_time *shutdown_time;
	unsigned int shutdown_mask;
};

struct axp20x_pek {
	struct axp20x_dev *axp20x;
	struct input_dev *input;
	struct axp20x_info *info;
	int irq_dbr;
	int irq_dbf;
};

struct axp20x_time {
	unsigned int time;
	unsigned int idx;
};

static const struct axp20x_time startup_time[] = {
	{ .time = 128,  .idx = 0 },
	{ .time = 1000, .idx = 2 },
	{ .time = 3000, .idx = 1 },
	{ .time = 2000, .idx = 3 },
};

static const struct axp20x_time axp221_startup_time[] = {
	{ .time = 128,  .idx = 0 },
	{ .time = 1000, .idx = 1 },
	{ .time = 2000, .idx = 2 },
	{ .time = 3000, .idx = 3 },
};

static const struct axp20x_time shutdown_time[] = {
	{ .time = 4000,  .idx = 0 },
	{ .time = 6000,  .idx = 1 },
	{ .time = 8000,  .idx = 2 },
	{ .time = 10000, .idx = 3 },
};

static const struct axp20x_info axp20x_info = {
	.startup_time = startup_time,
	.startup_mask = AXP20X_PEK_STARTUP_MASK,
	.shutdown_time = shutdown_time,
	.shutdown_mask = AXP20X_PEK_SHUTDOWN_MASK,
};

static const struct axp20x_info axp221_info = {
	.startup_time = axp221_startup_time,
	.startup_mask = AXP20X_PEK_STARTUP_MASK,
	.shutdown_time = shutdown_time,
	.shutdown_mask = AXP20X_PEK_SHUTDOWN_MASK,
};

static ssize_t axp20x_show_attr(struct device *dev,
				const struct axp20x_time *time,
				unsigned int mask, char *buf)
{
	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
	unsigned int val;
	int ret, i;

	ret = regmap_read(axp20x_pek->axp20x->regmap, AXP20X_PEK_KEY, &val);
	if (ret != 0)
		return ret;

	val &= mask;
	val >>= ffs(mask) - 1;

	for (i = 0; i < 4; i++)
		if (val == time[i].idx)
			val = time[i].time;

	return sprintf(buf, "%u\n", val);
}

static ssize_t axp20x_show_attr_startup(struct device *dev,
					struct device_attribute *attr,
					char *buf)
{
	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);

	return axp20x_show_attr(dev, axp20x_pek->info->startup_time,
				axp20x_pek->info->startup_mask, buf);
}

static ssize_t axp20x_show_attr_shutdown(struct device *dev,
					 struct device_attribute *attr,
					 char *buf)
{
	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);

	return axp20x_show_attr(dev, axp20x_pek->info->shutdown_time,
				axp20x_pek->info->shutdown_mask, buf);
}

static ssize_t axp20x_store_attr(struct device *dev,
				 const struct axp20x_time *time,
				 unsigned int mask, const char *buf,
				 size_t count)
{
	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
	char val_str[20];
	size_t len;
	int ret, i;
	unsigned int val, idx = 0;
	unsigned int best_err = UINT_MAX;

	val_str[sizeof(val_str) - 1] = '\0';
	strncpy(val_str, buf, sizeof(val_str) - 1);
	len = strlen(val_str);

	if (len && val_str[len - 1] == '\n')
		val_str[len - 1] = '\0';

	ret = kstrtouint(val_str, 10, &val);
	if (ret)
		return ret;

	for (i = 3; i >= 0; i--) {
		unsigned int err;

		err = abs(time[i].time - val);
		if (err < best_err) {
			best_err = err;
			idx = time[i].idx;
		}

		if (!err)
			break;
	}

	idx <<= ffs(mask) - 1;
	ret = regmap_update_bits(axp20x_pek->axp20x->regmap, AXP20X_PEK_KEY,
				 mask, idx);
	if (ret != 0)
		return -EINVAL;

	return count;
}

static ssize_t axp20x_store_attr_startup(struct device *dev,
					 struct device_attribute *attr,
					 const char *buf, size_t count)
{
	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);

	return axp20x_store_attr(dev, axp20x_pek->info->startup_time,
				 axp20x_pek->info->startup_mask, buf, count);
}

static ssize_t axp20x_store_attr_shutdown(struct device *dev,
					  struct device_attribute *attr,
					  const char *buf, size_t count)
{
	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);

	return axp20x_store_attr(dev, axp20x_pek->info->shutdown_time,
				 axp20x_pek->info->shutdown_mask, buf, count);
}

DEVICE_ATTR(startup, 0644, axp20x_show_attr_startup, axp20x_store_attr_startup);
DEVICE_ATTR(shutdown, 0644, axp20x_show_attr_shutdown,
	    axp20x_store_attr_shutdown);

static struct attribute *axp20x_attributes[] = {
	&dev_attr_startup.attr,
	&dev_attr_shutdown.attr,
	NULL,
};

static const struct attribute_group axp20x_attribute_group = {
	.attrs = axp20x_attributes,
};

static irqreturn_t axp20x_pek_irq(int irq, void *pwr)
{
	struct input_dev *idev = pwr;
	struct axp20x_pek *axp20x_pek = input_get_drvdata(idev);

	/*
	 * The power-button is connected to ground so a falling edge (dbf)
	 * means it is pressed.
	 */
	if (irq == axp20x_pek->irq_dbf)
		input_report_key(idev, KEY_POWER, true);
	else if (irq == axp20x_pek->irq_dbr)
		input_report_key(idev, KEY_POWER, false);

	input_sync(idev);

	return IRQ_HANDLED;
}

static int axp20x_pek_probe_input_device(struct axp20x_pek *axp20x_pek,
					 struct platform_device *pdev)
{
	struct axp20x_dev *axp20x = axp20x_pek->axp20x;
	struct input_dev *idev;
	int error;

	axp20x_pek->irq_dbr = platform_get_irq_byname(pdev, "PEK_DBR");
	if (axp20x_pek->irq_dbr < 0) {
		dev_err(&pdev->dev, "No IRQ for PEK_DBR, error=%d\n",
				axp20x_pek->irq_dbr);
		return axp20x_pek->irq_dbr;
	}
	axp20x_pek->irq_dbr = regmap_irq_get_virq(axp20x->regmap_irqc,
						  axp20x_pek->irq_dbr);

	axp20x_pek->irq_dbf = platform_get_irq_byname(pdev, "PEK_DBF");
	if (axp20x_pek->irq_dbf < 0) {
		dev_err(&pdev->dev, "No IRQ for PEK_DBF, error=%d\n",
				axp20x_pek->irq_dbf);
		return axp20x_pek->irq_dbf;
	}
	axp20x_pek->irq_dbf = regmap_irq_get_virq(axp20x->regmap_irqc,
						  axp20x_pek->irq_dbf);

	axp20x_pek->input = devm_input_allocate_device(&pdev->dev);
	if (!axp20x_pek->input)
		return -ENOMEM;

	idev = axp20x_pek->input;

	idev->name = "axp20x-pek";
	idev->phys = "m1kbd/input2";
	idev->dev.parent = &pdev->dev;

	input_set_capability(idev, EV_KEY, KEY_POWER);

	input_set_drvdata(idev, axp20x_pek);

	error = devm_request_any_context_irq(&pdev->dev, axp20x_pek->irq_dbr,
					     axp20x_pek_irq, 0,
					     "axp20x-pek-dbr", idev);
	if (error < 0) {
		dev_err(&pdev->dev, "Failed to request dbr IRQ#%d: %d\n",
			axp20x_pek->irq_dbr, error);
		return error;
	}

	error = devm_request_any_context_irq(&pdev->dev, axp20x_pek->irq_dbf,
					  axp20x_pek_irq, 0,
					  "axp20x-pek-dbf", idev);
	if (error < 0) {
		dev_err(&pdev->dev, "Failed to request dbf IRQ#%d: %d\n",
			axp20x_pek->irq_dbf, error);
		return error;
	}

	error = input_register_device(idev);
	if (error) {
		dev_err(&pdev->dev, "Can't register input device: %d\n",
			error);
		return error;
	}

	if (axp20x_pek->axp20x->variant == AXP288_ID)
		enable_irq_wake(axp20x_pek->irq_dbr);

	return 0;
}

#ifdef CONFIG_ACPI
static bool axp20x_pek_should_register_input(struct axp20x_pek *axp20x_pek,
					     struct platform_device *pdev)
{
	unsigned long long hrv = 0;
	acpi_status status;

	if (IS_ENABLED(CONFIG_INPUT_SOC_BUTTON_ARRAY) &&
	    axp20x_pek->axp20x->variant == AXP288_ID) {
		status = acpi_evaluate_integer(ACPI_HANDLE(pdev->dev.parent),
					       "_HRV", NULL, &hrv);
		if (ACPI_FAILURE(status))
			dev_err(&pdev->dev, "Failed to get PMIC hardware revision\n");

		/*
		 * On Cherry Trail platforms (hrv == 3), do not register the
		 * input device if there is an "INTCFD9" or "ACPI0011" gpio
		 * button ACPI device, as that handles the power button too,
		 * and otherwise we end up reporting all presses twice.
		 */
		if (hrv == 3 && (acpi_dev_present("INTCFD9", NULL, -1) ||
				 acpi_dev_present("ACPI0011", NULL, -1)))
			return false;

	}

	return true;
}
#else
static bool axp20x_pek_should_register_input(struct axp20x_pek *axp20x_pek,
					     struct platform_device *pdev)
{
	return true;
}
#endif

static int axp20x_pek_probe(struct platform_device *pdev)
{
	struct axp20x_pek *axp20x_pek;
	const struct platform_device_id *match = platform_get_device_id(pdev);
	int error;

	if (!match) {
		dev_err(&pdev->dev, "Failed to get platform_device_id\n");
		return -EINVAL;
	}

	axp20x_pek = devm_kzalloc(&pdev->dev, sizeof(struct axp20x_pek),
				  GFP_KERNEL);
	if (!axp20x_pek)
		return -ENOMEM;

	axp20x_pek->axp20x = dev_get_drvdata(pdev->dev.parent);

	if (axp20x_pek_should_register_input(axp20x_pek, pdev)) {
		error = axp20x_pek_probe_input_device(axp20x_pek, pdev);
		if (error)
			return error;
	}

	axp20x_pek->info = (struct axp20x_info *)match->driver_data;

	error = devm_device_add_group(&pdev->dev, &axp20x_attribute_group);
	if (error) {
		dev_err(&pdev->dev, "Failed to create sysfs attributes: %d\n",
			error);
		return error;
	}

	platform_set_drvdata(pdev, axp20x_pek);

	return 0;
}

static int __maybe_unused axp20x_pek_resume_noirq(struct device *dev)
{
	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);

	if (axp20x_pek->axp20x->variant != AXP288_ID)
		return 0;

	/*
	 * Clear interrupts from button presses during suspend, to avoid
	 * a wakeup power-button press getting reported to userspace.
	 */
	regmap_write(axp20x_pek->axp20x->regmap,
		     AXP20X_IRQ1_STATE + AXP288_IRQ_POKN / 8,
		     BIT(AXP288_IRQ_POKN % 8));

	return 0;
}

static const struct dev_pm_ops axp20x_pek_pm_ops = {
#ifdef CONFIG_PM_SLEEP
	.resume_noirq = axp20x_pek_resume_noirq,
#endif
};

static const struct platform_device_id axp_pek_id_match[] = {
	{
		.name = "axp20x-pek",
		.driver_data = (kernel_ulong_t)&axp20x_info,
	},
	{
		.name = "axp221-pek",
		.driver_data = (kernel_ulong_t)&axp221_info,
	},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, axp_pek_id_match);

static struct platform_driver axp20x_pek_driver = {
	.probe		= axp20x_pek_probe,
	.id_table	= axp_pek_id_match,
	.driver		= {
		.name		= "axp20x-pek",
		.pm		= &axp20x_pek_pm_ops,
	},
};
module_platform_driver(axp20x_pek_driver);

MODULE_DESCRIPTION("axp20x Power Button");
MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
MODULE_LICENSE("GPL");
Commit	Line	Data
5b6c26a9 CC	1	/*
	2	* axp20x power button driver.
	3	*
	4	* Copyright (C) 2013 Carlo Caione <carlo@caione.org>
	5	*
	6	* This file is subject to the terms and conditions of the GNU General
	7	* Public License. See the file "COPYING" in the main directory of this
	8	* archive for more details.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*/
	15
9b13a4ca	16	#include <linux/acpi.h>
5b6c26a9 CC	17	#include <linux/errno.h>
	18	#include <linux/irq.h>
	19	#include <linux/init.h>
	20	#include <linux/input.h>
	21	#include <linux/interrupt.h>
	22	#include <linux/kernel.h>
	23	#include <linux/mfd/axp20x.h>
	24	#include <linux/module.h>
	25	#include <linux/platform_device.h>
	26	#include <linux/regmap.h>
	27	#include <linux/slab.h>
	28
	29	#define AXP20X_PEK_STARTUP_MASK (0xc0)
	30	#define AXP20X_PEK_SHUTDOWN_MASK (0x03)
	31
fbc1b323 QS	32	struct axp20x_info {
	33	const struct axp20x_time *startup_time;
	34	unsigned int startup_mask;
	35	const struct axp20x_time *shutdown_time;
	36	unsigned int shutdown_mask;
	37	};
	38
5b6c26a9 CC	39	struct axp20x_pek {
	40	struct axp20x_dev *axp20x;
	41	struct input_dev *input;
fbc1b323	42	struct axp20x_info *info;
5b6c26a9 CC	43	int irq_dbr;
	44	int irq_dbf;
	45	};
	46
	47	struct axp20x_time {
	48	unsigned int time;
	49	unsigned int idx;
	50	};
	51
	52	static const struct axp20x_time startup_time[] = {
	53	{ .time = 128, .idx = 0 },
	54	{ .time = 1000, .idx = 2 },
	55	{ .time = 3000, .idx = 1 },
	56	{ .time = 2000, .idx = 3 },
	57	};
	58
c3cc9447 QS	59	static const struct axp20x_time axp221_startup_time[] = {
	60	{ .time = 128, .idx = 0 },
	61	{ .time = 1000, .idx = 1 },
	62	{ .time = 2000, .idx = 2 },
	63	{ .time = 3000, .idx = 3 },
	64	};
	65
5b6c26a9 CC	66	static const struct axp20x_time shutdown_time[] = {
	67	{ .time = 4000, .idx = 0 },
	68	{ .time = 6000, .idx = 1 },
	69	{ .time = 8000, .idx = 2 },
	70	{ .time = 10000, .idx = 3 },
	71	};
	72
fbc1b323 QS	73	static const struct axp20x_info axp20x_info = {
	74	.startup_time = startup_time,
	75	.startup_mask = AXP20X_PEK_STARTUP_MASK,
	76	.shutdown_time = shutdown_time,
	77	.shutdown_mask = AXP20X_PEK_SHUTDOWN_MASK,
5b6c26a9 CC	78	};
5b6c26a9 CC	79
c3cc9447 QS	80	static const struct axp20x_info axp221_info = {
	81	.startup_time = axp221_startup_time,
	82	.startup_mask = AXP20X_PEK_STARTUP_MASK,
	83	.shutdown_time = shutdown_time,
	84	.shutdown_mask = AXP20X_PEK_SHUTDOWN_MASK,
	85	};
	86
fbc1b323 QS	87	static ssize_t axp20x_show_attr(struct device *dev,
	88	const struct axp20x_time *time,
	89	unsigned int mask, char *buf)
5b6c26a9 CC	90	{
5b6c26a9 CC	91	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
5b6c26a9 CC	92	unsigned int val;
	93	int ret, i;
	94
	95	ret = regmap_read(axp20x_pek->axp20x->regmap, AXP20X_PEK_KEY, &val);
	96	if (ret != 0)
	97	return ret;
	98
fbc1b323 QS	99	val &= mask;
fbc1b323 QS	100	val >>= ffs(mask) - 1;
5b6c26a9 CC	101
5b6c26a9 CC	102	for (i = 0; i < 4; i++)
fbc1b323 QS	103	if (val == time[i].idx)
fbc1b323 QS	104	val = time[i].time;
5b6c26a9 CC	105
	106	return sprintf(buf, "%u\n", val);
	107	}
	108
fbc1b323 QS	109	static ssize_t axp20x_show_attr_startup(struct device *dev,
	110	struct device_attribute *attr,
	111	char *buf)
	112	{
	113	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
	114
	115	return axp20x_show_attr(dev, axp20x_pek->info->startup_time,
	116	axp20x_pek->info->startup_mask, buf);
	117	}
	118
	119	static ssize_t axp20x_show_attr_shutdown(struct device *dev,
	120	struct device_attribute *attr,
	121	char *buf)
	122	{
	123	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
	124
	125	return axp20x_show_attr(dev, axp20x_pek->info->shutdown_time,
	126	axp20x_pek->info->shutdown_mask, buf);
	127	}
	128
	129	static ssize_t axp20x_store_attr(struct device *dev,
	130	const struct axp20x_time *time,
	131	unsigned int mask, const char *buf,
	132	size_t count)
5b6c26a9 CC	133	{
5b6c26a9 CC	134	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
5b6c26a9 CC	135	char val_str[20];
	136	size_t len;
	137	int ret, i;
	138	unsigned int val, idx = 0;
	139	unsigned int best_err = UINT_MAX;
	140
	141	val_str[sizeof(val_str) - 1] = '\0';
	142	strncpy(val_str, buf, sizeof(val_str) - 1);
	143	len = strlen(val_str);
	144
	145	if (len && val_str[len - 1] == '\n')
	146	val_str[len - 1] = '\0';
	147
	148	ret = kstrtouint(val_str, 10, &val);
	149	if (ret)
	150	return ret;
	151
	152	for (i = 3; i >= 0; i--) {
	153	unsigned int err;
	154
fbc1b323	155	err = abs(time[i].time - val);
5b6c26a9 CC	156	if (err < best_err) {
5b6c26a9 CC	157	best_err = err;
fbc1b323	158	idx = time[i].idx;
5b6c26a9 CC	159	}
	160
	161	if (!err)
	162	break;
	163	}
	164
fbc1b323 QS	165	idx <<= ffs(mask) - 1;
	166	ret = regmap_update_bits(axp20x_pek->axp20x->regmap, AXP20X_PEK_KEY,
	167	mask, idx);
5b6c26a9 CC	168	if (ret != 0)
5b6c26a9 CC	169	return -EINVAL;
b388de88	170
5b6c26a9 CC	171	return count;
	172	}
	173
fbc1b323 QS	174	static ssize_t axp20x_store_attr_startup(struct device *dev,
	175	struct device_attribute *attr,
	176	const char *buf, size_t count)
	177	{
	178	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
5b6c26a9	179
fbc1b323 QS	180	return axp20x_store_attr(dev, axp20x_pek->info->startup_time,
	181	axp20x_pek->info->startup_mask, buf, count);
	182	}
	183
	184	static ssize_t axp20x_store_attr_shutdown(struct device *dev,
	185	struct device_attribute *attr,
	186	const char *buf, size_t count)
	187	{
	188	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
	189
	190	return axp20x_store_attr(dev, axp20x_pek->info->shutdown_time,
	191	axp20x_pek->info->shutdown_mask, buf, count);
	192	}
	193
	194	DEVICE_ATTR(startup, 0644, axp20x_show_attr_startup, axp20x_store_attr_startup);
	195	DEVICE_ATTR(shutdown, 0644, axp20x_show_attr_shutdown,
	196	axp20x_store_attr_shutdown);
b388de88 DT	197
b388de88 DT	198	static struct attribute *axp20x_attributes[] = {
fbc1b323 QS	199	&dev_attr_startup.attr,
fbc1b323 QS	200	&dev_attr_shutdown.attr,
b388de88 DT	201	NULL,
	202	};
	203
	204	static const struct attribute_group axp20x_attribute_group = {
	205	.attrs = axp20x_attributes,
5b6c26a9 CC	206	};
	207
	208	static irqreturn_t axp20x_pek_irq(int irq, void *pwr)
	209	{
	210	struct input_dev *idev = pwr;
	211	struct axp20x_pek *axp20x_pek = input_get_drvdata(idev);
	212
eeeee40f HG	213	/*
	214	* The power-button is connected to ground so a falling edge (dbf)
	215	* means it is pressed.
	216	*/
	217	if (irq == axp20x_pek->irq_dbf)
5b6c26a9	218	input_report_key(idev, KEY_POWER, true);
eeeee40f	219	else if (irq == axp20x_pek->irq_dbr)
5b6c26a9 CC	220	input_report_key(idev, KEY_POWER, false);
	221
	222	input_sync(idev);
	223
	224	return IRQ_HANDLED;
	225	}
	226
f2bd5a9e HG	227	static int axp20x_pek_probe_input_device(struct axp20x_pek *axp20x_pek,
f2bd5a9e HG	228	struct platform_device *pdev)
5b6c26a9	229	{
f2bd5a9e	230	struct axp20x_dev *axp20x = axp20x_pek->axp20x;
5b6c26a9 CC	231	struct input_dev *idev;
	232	int error;
	233
5b6c26a9 CC	234	axp20x_pek->irq_dbr = platform_get_irq_byname(pdev, "PEK_DBR");
	235	if (axp20x_pek->irq_dbr < 0) {
	236	dev_err(&pdev->dev, "No IRQ for PEK_DBR, error=%d\n",
	237	axp20x_pek->irq_dbr);
	238	return axp20x_pek->irq_dbr;
	239	}
	240	axp20x_pek->irq_dbr = regmap_irq_get_virq(axp20x->regmap_irqc,
	241	axp20x_pek->irq_dbr);
	242
	243	axp20x_pek->irq_dbf = platform_get_irq_byname(pdev, "PEK_DBF");
	244	if (axp20x_pek->irq_dbf < 0) {
	245	dev_err(&pdev->dev, "No IRQ for PEK_DBF, error=%d\n",
	246	axp20x_pek->irq_dbf);
	247	return axp20x_pek->irq_dbf;
	248	}
	249	axp20x_pek->irq_dbf = regmap_irq_get_virq(axp20x->regmap_irqc,
	250	axp20x_pek->irq_dbf);
	251
	252	axp20x_pek->input = devm_input_allocate_device(&pdev->dev);
	253	if (!axp20x_pek->input)
	254	return -ENOMEM;
	255
	256	idev = axp20x_pek->input;
	257
	258	idev->name = "axp20x-pek";
	259	idev->phys = "m1kbd/input2";
	260	idev->dev.parent = &pdev->dev;
	261
	262	input_set_capability(idev, EV_KEY, KEY_POWER);
	263
	264	input_set_drvdata(idev, axp20x_pek);
	265
	266	error = devm_request_any_context_irq(&pdev->dev, axp20x_pek->irq_dbr,
b388de88 DT	267	axp20x_pek_irq, 0,
b388de88 DT	268	"axp20x-pek-dbr", idev);
5b6c26a9	269	if (error < 0) {
73915f36	270	dev_err(&pdev->dev, "Failed to request dbr IRQ#%d: %d\n",
5b6c26a9	271	axp20x_pek->irq_dbr, error);
5b6c26a9 CC	272	return error;
	273	}
	274
	275	error = devm_request_any_context_irq(&pdev->dev, axp20x_pek->irq_dbf,
	276	axp20x_pek_irq, 0,
	277	"axp20x-pek-dbf", idev);
	278	if (error < 0) {
73915f36	279	dev_err(&pdev->dev, "Failed to request dbf IRQ#%d: %d\n",
5b6c26a9 CC	280	axp20x_pek->irq_dbf, error);
	281	return error;
	282	}
	283
f2bd5a9e HG	284	error = input_register_device(idev);
	285	if (error) {
	286	dev_err(&pdev->dev, "Can't register input device: %d\n",
	287	error);
	288	return error;
	289	}
	290
58be7689 HG	291	if (axp20x_pek->axp20x->variant == AXP288_ID)
	292	enable_irq_wake(axp20x_pek->irq_dbr);
	293
f2bd5a9e HG	294	return 0;
	295	}
	296
8d4b3137 HG	297	#ifdef CONFIG_ACPI
	298	static bool axp20x_pek_should_register_input(struct axp20x_pek *axp20x_pek,
	299	struct platform_device *pdev)
	300	{
	301	unsigned long long hrv = 0;
	302	acpi_status status;
	303
	304	if (IS_ENABLED(CONFIG_INPUT_SOC_BUTTON_ARRAY) &&
	305	axp20x_pek->axp20x->variant == AXP288_ID) {
	306	status = acpi_evaluate_integer(ACPI_HANDLE(pdev->dev.parent),
	307	"_HRV", NULL, &hrv);
	308	if (ACPI_FAILURE(status))
	309	dev_err(&pdev->dev, "Failed to get PMIC hardware revision\n");
	310
	311	/*
	312	* On Cherry Trail platforms (hrv == 3), do not register the
0fd5f221	313	* input device if there is an "INTCFD9" or "ACPI0011" gpio
8d4b3137 HG	314	* button ACPI device, as that handles the power button too,
	315	* and otherwise we end up reporting all presses twice.
	316	*/
0fd5f221 HG	317	if (hrv == 3 && (acpi_dev_present("INTCFD9", NULL, -1) \|\|
0fd5f221 HG	318	acpi_dev_present("ACPI0011", NULL, -1)))
8d4b3137 HG	319	return false;
	320
	321	}
	322
	323	return true;
	324	}
	325	#else
	326	static bool axp20x_pek_should_register_input(struct axp20x_pek *axp20x_pek,
	327	struct platform_device *pdev)
	328	{
	329	return true;
	330	}
	331	#endif
	332
f2bd5a9e HG	333	static int axp20x_pek_probe(struct platform_device *pdev)
	334	{
	335	struct axp20x_pek *axp20x_pek;
fbc1b323	336	const struct platform_device_id *match = platform_get_device_id(pdev);
f2bd5a9e HG	337	int error;
f2bd5a9e HG	338
fbc1b323 QS	339	if (!match) {
	340	dev_err(&pdev->dev, "Failed to get platform_device_id\n");
	341	return -EINVAL;
	342	}
	343
f2bd5a9e HG	344	axp20x_pek = devm_kzalloc(&pdev->dev, sizeof(struct axp20x_pek),
	345	GFP_KERNEL);
	346	if (!axp20x_pek)
	347	return -ENOMEM;
	348
	349	axp20x_pek->axp20x = dev_get_drvdata(pdev->dev.parent);
	350
8d4b3137	351	if (axp20x_pek_should_register_input(axp20x_pek, pdev)) {
9b13a4ca HG	352	error = axp20x_pek_probe_input_device(axp20x_pek, pdev);
	353	if (error)
	354	return error;
	355	}
f2bd5a9e	356
fbc1b323 QS	357	axp20x_pek->info = (struct axp20x_info *)match->driver_data;
fbc1b323 QS	358
072a7852	359	error = devm_device_add_group(&pdev->dev, &axp20x_attribute_group);
b388de88	360	if (error) {
73915f36	361	dev_err(&pdev->dev, "Failed to create sysfs attributes: %d\n",
b388de88	362	error);
b388de88 DT	363	return error;
b388de88 DT	364	}
5b6c26a9	365
5b6c26a9 CC	366	platform_set_drvdata(pdev, axp20x_pek);
5b6c26a9 CC	367
5b6c26a9 CC	368	return 0;
	369	}
	370
58be7689 HG	371	static int __maybe_unused axp20x_pek_resume_noirq(struct device *dev)
	372	{
	373	struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
	374
	375	if (axp20x_pek->axp20x->variant != AXP288_ID)
	376	return 0;
	377
	378	/*
	379	* Clear interrupts from button presses during suspend, to avoid
	380	* a wakeup power-button press getting reported to userspace.
	381	*/
	382	regmap_write(axp20x_pek->axp20x->regmap,
	383	AXP20X_IRQ1_STATE + AXP288_IRQ_POKN / 8,
	384	BIT(AXP288_IRQ_POKN % 8));
	385
	386	return 0;
	387	}
	388
	389	static const struct dev_pm_ops axp20x_pek_pm_ops = {
	390	#ifdef CONFIG_PM_SLEEP
	391	.resume_noirq = axp20x_pek_resume_noirq,
	392	#endif
	393	};
	394
fbc1b323 QS	395	static const struct platform_device_id axp_pek_id_match[] = {
	396	{
	397	.name = "axp20x-pek",
	398	.driver_data = (kernel_ulong_t)&axp20x_info,
	399	},
c3cc9447 QS	400	{
	401	.name = "axp221-pek",
	402	.driver_data = (kernel_ulong_t)&axp221_info,
	403	},
fbc1b323 QS	404	{ /* sentinel */ }
fbc1b323 QS	405	};
481c209f	406	MODULE_DEVICE_TABLE(platform, axp_pek_id_match);
fbc1b323	407
5b6c26a9 CC	408	static struct platform_driver axp20x_pek_driver = {
5b6c26a9 CC	409	.probe = axp20x_pek_probe,
fbc1b323	410	.id_table = axp_pek_id_match,
5b6c26a9 CC	411	.driver = {
5b6c26a9 CC	412	.name = "axp20x-pek",
58be7689	413	.pm = &axp20x_pek_pm_ops,
5b6c26a9 CC	414	},
	415	};
	416	module_platform_driver(axp20x_pek_driver);
	417
	418	MODULE_DESCRIPTION("axp20x Power Button");
	419	MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
	420	MODULE_LICENSE("GPL");