[mirror_ubuntu-jammy-kernel.git] / drivers / input / joystick / as5011.c

/*
 * Copyright (c) 2010, 2011 Fabien Marteau <fabien.marteau@armadeus.com>
 * Sponsored by ARMadeus Systems
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Driver for Austria Microsystems joysticks AS5011
 *
 * TODO:
 *	- Power on the chip when open() and power down when close()
 *	- Manage power mode
 */

#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/input/as5011.h>
#include <linux/slab.h>
#include <linux/module.h>

#define DRIVER_DESC "Driver for Austria Microsystems AS5011 joystick"
#define MODULE_DEVICE_ALIAS "as5011"

MODULE_AUTHOR("Fabien Marteau <fabien.marteau@armadeus.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

/* registers */
#define AS5011_CTRL1		0x76
#define AS5011_CTRL2		0x75
#define AS5011_XP		0x43
#define AS5011_XN		0x44
#define AS5011_YP		0x53
#define AS5011_YN		0x54
#define AS5011_X_REG		0x41
#define AS5011_Y_REG		0x42
#define AS5011_X_RES_INT	0x51
#define AS5011_Y_RES_INT	0x52

/* CTRL1 bits */
#define AS5011_CTRL1_LP_PULSED		0x80
#define AS5011_CTRL1_LP_ACTIVE		0x40
#define AS5011_CTRL1_LP_CONTINUE	0x20
#define AS5011_CTRL1_INT_WUP_EN		0x10
#define AS5011_CTRL1_INT_ACT_EN		0x08
#define AS5011_CTRL1_EXT_CLK_EN		0x04
#define AS5011_CTRL1_SOFT_RST		0x02
#define AS5011_CTRL1_DATA_VALID		0x01

/* CTRL2 bits */
#define AS5011_CTRL2_EXT_SAMPLE_EN	0x08
#define AS5011_CTRL2_RC_BIAS_ON		0x04
#define AS5011_CTRL2_INV_SPINNING	0x02

#define AS5011_MAX_AXIS	80
#define AS5011_MIN_AXIS	(-80)
#define AS5011_FUZZ	8
#define AS5011_FLAT	40

struct as5011_device {
	struct input_dev *input_dev;
	struct i2c_client *i2c_client;
	unsigned int button_gpio;
	unsigned int button_irq;
	unsigned int axis_irq;
};

static int as5011_i2c_write(struct i2c_client *client,
			    uint8_t aregaddr,
			    uint8_t avalue)
{
	uint8_t data[2] = { aregaddr, avalue };
	struct i2c_msg msg = {
		.addr = client->addr,
		.flags = I2C_M_IGNORE_NAK,
		.len = 2,
		.buf = (uint8_t *)data
	};
	int error;

	error = i2c_transfer(client->adapter, &msg, 1);
	return error < 0 ? error : 0;
}

static int as5011_i2c_read(struct i2c_client *client,
			   uint8_t aregaddr, signed char *value)
{
	uint8_t data[2] = { aregaddr };
	struct i2c_msg msg_set[2] = {
		{
			.addr = client->addr,
			.flags = I2C_M_REV_DIR_ADDR,
			.len = 1,
			.buf = (uint8_t *)data
		},
		{
			.addr = client->addr,
			.flags = I2C_M_RD | I2C_M_NOSTART,
			.len = 1,
			.buf = (uint8_t *)data
		}
	};
	int error;

	error = i2c_transfer(client->adapter, msg_set, 2);
	if (error < 0)
		return error;

	*value = data[0] & 0x80 ? -1 * (1 + ~data[0]) : data[0];
	return 0;
}

static irqreturn_t as5011_button_interrupt(int irq, void *dev_id)
{
	struct as5011_device *as5011 = dev_id;
	int val = gpio_get_value_cansleep(as5011->button_gpio);

	input_report_key(as5011->input_dev, BTN_JOYSTICK, !val);
	input_sync(as5011->input_dev);

	return IRQ_HANDLED;
}

static irqreturn_t as5011_axis_interrupt(int irq, void *dev_id)
{
	struct as5011_device *as5011 = dev_id;
	int error;
	signed char x, y;

	error = as5011_i2c_read(as5011->i2c_client, AS5011_X_RES_INT, &x);
	if (error < 0)
		goto out;

	error = as5011_i2c_read(as5011->i2c_client, AS5011_Y_RES_INT, &y);
	if (error < 0)
		goto out;

	input_report_abs(as5011->input_dev, ABS_X, x);
	input_report_abs(as5011->input_dev, ABS_Y, y);
	input_sync(as5011->input_dev);

out:
	return IRQ_HANDLED;
}

static int as5011_configure_chip(struct as5011_device *as5011,
				const struct as5011_platform_data *plat_dat)
{
	struct i2c_client *client = as5011->i2c_client;
	int error;
	signed char value;

	/* chip soft reset */
	error = as5011_i2c_write(client, AS5011_CTRL1,
				 AS5011_CTRL1_SOFT_RST);
	if (error < 0) {
		dev_err(&client->dev, "Soft reset failed\n");
		return error;
	}

	mdelay(10);

	error = as5011_i2c_write(client, AS5011_CTRL1,
				 AS5011_CTRL1_LP_PULSED |
				 AS5011_CTRL1_LP_ACTIVE |
				 AS5011_CTRL1_INT_ACT_EN);
	if (error < 0) {
		dev_err(&client->dev, "Power config failed\n");
		return error;
	}

	error = as5011_i2c_write(client, AS5011_CTRL2,
				 AS5011_CTRL2_INV_SPINNING);
	if (error < 0) {
		dev_err(&client->dev, "Can't invert spinning\n");
		return error;
	}

	/* write threshold */
	error = as5011_i2c_write(client, AS5011_XP, plat_dat->xp);
	if (error < 0) {
		dev_err(&client->dev, "Can't write threshold\n");
		return error;
	}

	error = as5011_i2c_write(client, AS5011_XN, plat_dat->xn);
	if (error < 0) {
		dev_err(&client->dev, "Can't write threshold\n");
		return error;
	}

	error = as5011_i2c_write(client, AS5011_YP, plat_dat->yp);
	if (error < 0) {
		dev_err(&client->dev, "Can't write threshold\n");
		return error;
	}

	error = as5011_i2c_write(client, AS5011_YN, plat_dat->yn);
	if (error < 0) {
		dev_err(&client->dev, "Can't write threshold\n");
		return error;
	}

	/* to free irq gpio in chip */
	error = as5011_i2c_read(client, AS5011_X_RES_INT, &value);
	if (error < 0) {
		dev_err(&client->dev, "Can't read i2c X resolution value\n");
		return error;
	}

	return 0;
}

static int as5011_probe(struct i2c_client *client,
			 const struct i2c_device_id *id)
{
	const struct as5011_platform_data *plat_data;
	struct as5011_device *as5011;
	struct input_dev *input_dev;
	int irq;
	int error;

	plat_data = client->dev.platform_data;
	if (!plat_data)
		return -EINVAL;

	if (!plat_data->axis_irq) {
		dev_err(&client->dev, "No axis IRQ?\n");
		return -EINVAL;
	}

	if (!i2c_check_functionality(client->adapter,
				     I2C_FUNC_NOSTART |
				     I2C_FUNC_PROTOCOL_MANGLING)) {
		dev_err(&client->dev,
			"need i2c bus that supports protocol mangling\n");
		return -ENODEV;
	}

	as5011 = kmalloc(sizeof(struct as5011_device), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!as5011 || !input_dev) {
		dev_err(&client->dev,
			"Can't allocate memory for device structure\n");
		error = -ENOMEM;
		goto err_free_mem;
	}

	as5011->i2c_client = client;
	as5011->input_dev = input_dev;
	as5011->button_gpio = plat_data->button_gpio;
	as5011->axis_irq = plat_data->axis_irq;

	input_dev->name = "Austria Microsystem as5011 joystick";
	input_dev->id.bustype = BUS_I2C;
	input_dev->dev.parent = &client->dev;

	__set_bit(EV_KEY, input_dev->evbit);
	__set_bit(EV_ABS, input_dev->evbit);
	__set_bit(BTN_JOYSTICK, input_dev->keybit);

	input_set_abs_params(input_dev, ABS_X,
		AS5011_MIN_AXIS, AS5011_MAX_AXIS, AS5011_FUZZ, AS5011_FLAT);
	input_set_abs_params(as5011->input_dev, ABS_Y,
		AS5011_MIN_AXIS, AS5011_MAX_AXIS, AS5011_FUZZ, AS5011_FLAT);

	error = gpio_request(as5011->button_gpio, "AS5011 button");
	if (error < 0) {
		dev_err(&client->dev, "Failed to request button gpio\n");
		goto err_free_mem;
	}

	irq = gpio_to_irq(as5011->button_gpio);
	if (irq < 0) {
		dev_err(&client->dev,
			"Failed to get irq number for button gpio\n");
		goto err_free_button_gpio;
	}

	as5011->button_irq = irq;

	error = request_threaded_irq(as5011->button_irq,
				     NULL, as5011_button_interrupt,
				     IRQF_TRIGGER_RISING |
					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
				     "as5011_button", as5011);
	if (error < 0) {
		dev_err(&client->dev,
			"Can't allocate button irq %d\n", as5011->button_irq);
		goto err_free_button_gpio;
	}

	error = as5011_configure_chip(as5011, plat_data);
	if (error)
		goto err_free_button_irq;

	error = request_threaded_irq(as5011->axis_irq, NULL,
				     as5011_axis_interrupt,
				     plat_data->axis_irqflags | IRQF_ONESHOT,
				     "as5011_joystick", as5011);
	if (error) {
		dev_err(&client->dev,
			"Can't allocate axis irq %d\n", plat_data->axis_irq);
		goto err_free_button_irq;
	}

	error = input_register_device(as5011->input_dev);
	if (error) {
		dev_err(&client->dev, "Failed to register input device\n");
		goto err_free_axis_irq;
	}

	i2c_set_clientdata(client, as5011);

	return 0;

err_free_axis_irq:
	free_irq(as5011->axis_irq, as5011);
err_free_button_irq:
	free_irq(as5011->button_irq, as5011);
err_free_button_gpio:
	gpio_free(as5011->button_gpio);
err_free_mem:
	input_free_device(input_dev);
	kfree(as5011);

	return error;
}

static int as5011_remove(struct i2c_client *client)
{
	struct as5011_device *as5011 = i2c_get_clientdata(client);

	free_irq(as5011->axis_irq, as5011);
	free_irq(as5011->button_irq, as5011);
	gpio_free(as5011->button_gpio);

	input_unregister_device(as5011->input_dev);
	kfree(as5011);

	return 0;
}

static const struct i2c_device_id as5011_id[] = {
	{ MODULE_DEVICE_ALIAS, 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, as5011_id);

static struct i2c_driver as5011_driver = {
	.driver = {
		.name = "as5011",
	},
	.probe		= as5011_probe,
	.remove		= as5011_remove,
	.id_table	= as5011_id,
};

module_i2c_driver(as5011_driver);
Commit	Line	Data
9d084a3d FM	1	/*
	2	* Copyright (c) 2010, 2011 Fabien Marteau <fabien.marteau@armadeus.com>
	3	* Sponsored by ARMadeus Systems
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	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	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*
	19	* Driver for Austria Microsystems joysticks AS5011
	20	*
	21	* TODO:
	22	* - Power on the chip when open() and power down when close()
	23	* - Manage power mode
	24	*/
	25
	26	#include <linux/i2c.h>
	27	#include <linux/interrupt.h>
	28	#include <linux/input.h>
	29	#include <linux/gpio.h>
	30	#include <linux/delay.h>
	31	#include <linux/input/as5011.h>
	32	#include <linux/slab.h>
d2d8442d	33	#include <linux/module.h>
9d084a3d FM	34
	35	#define DRIVER_DESC "Driver for Austria Microsystems AS5011 joystick"
	36	#define MODULE_DEVICE_ALIAS "as5011"
	37
	38	MODULE_AUTHOR("Fabien Marteau <fabien.marteau@armadeus.com>");
	39	MODULE_DESCRIPTION(DRIVER_DESC);
	40	MODULE_LICENSE("GPL");
	41
	42	/* registers */
	43	#define AS5011_CTRL1 0x76
	44	#define AS5011_CTRL2 0x75
	45	#define AS5011_XP 0x43
	46	#define AS5011_XN 0x44
	47	#define AS5011_YP 0x53
	48	#define AS5011_YN 0x54
	49	#define AS5011_X_REG 0x41
	50	#define AS5011_Y_REG 0x42
	51	#define AS5011_X_RES_INT 0x51
	52	#define AS5011_Y_RES_INT 0x52
	53
	54	/* CTRL1 bits */
	55	#define AS5011_CTRL1_LP_PULSED 0x80
	56	#define AS5011_CTRL1_LP_ACTIVE 0x40
	57	#define AS5011_CTRL1_LP_CONTINUE 0x20
	58	#define AS5011_CTRL1_INT_WUP_EN 0x10
	59	#define AS5011_CTRL1_INT_ACT_EN 0x08
	60	#define AS5011_CTRL1_EXT_CLK_EN 0x04
	61	#define AS5011_CTRL1_SOFT_RST 0x02
	62	#define AS5011_CTRL1_DATA_VALID 0x01
	63
	64	/* CTRL2 bits */
	65	#define AS5011_CTRL2_EXT_SAMPLE_EN 0x08
	66	#define AS5011_CTRL2_RC_BIAS_ON 0x04
	67	#define AS5011_CTRL2_INV_SPINNING 0x02
	68
	69	#define AS5011_MAX_AXIS 80
	70	#define AS5011_MIN_AXIS (-80)
	71	#define AS5011_FUZZ 8
	72	#define AS5011_FLAT 40
	73
	74	struct as5011_device {
	75	struct input_dev *input_dev;
	76	struct i2c_client *i2c_client;
	77	unsigned int button_gpio;
	78	unsigned int button_irq;
	79	unsigned int axis_irq;
	80	};
	81
	82	static int as5011_i2c_write(struct i2c_client *client,
	83	uint8_t aregaddr,
	84	uint8_t avalue)
	85	{
	86	uint8_t data[2] = { aregaddr, avalue };
	87	struct i2c_msg msg = {
24e491c2 S	88	.addr = client->addr,
	89	.flags = I2C_M_IGNORE_NAK,
	90	.len = 2,
	91	.buf = (uint8_t *)data
9d084a3d FM	92	};
	93	int error;
	94
	95	error = i2c_transfer(client->adapter, &msg, 1);
	96	return error < 0 ? error : 0;
	97	}
	98
	99	static int as5011_i2c_read(struct i2c_client *client,
	100	uint8_t aregaddr, signed char *value)
	101	{
	102	uint8_t data[2] = { aregaddr };
	103	struct i2c_msg msg_set[2] = {
24e491c2 S	104	{
	105	.addr = client->addr,
	106	.flags = I2C_M_REV_DIR_ADDR,
	107	.len = 1,
	108	.buf = (uint8_t *)data
	109	},
	110	{
	111	.addr = client->addr,
	112	.flags = I2C_M_RD \| I2C_M_NOSTART,
	113	.len = 1,
	114	.buf = (uint8_t *)data
	115	}
9d084a3d FM	116	};
	117	int error;
	118
	119	error = i2c_transfer(client->adapter, msg_set, 2);
	120	if (error < 0)
	121	return error;
	122
	123	value = data[0] & 0x80 ? -1 (1 + ~data[0]) : data[0];
	124	return 0;
	125	}
	126
	127	static irqreturn_t as5011_button_interrupt(int irq, void *dev_id)
	128	{
	129	struct as5011_device *as5011 = dev_id;
	130	int val = gpio_get_value_cansleep(as5011->button_gpio);
	131
	132	input_report_key(as5011->input_dev, BTN_JOYSTICK, !val);
	133	input_sync(as5011->input_dev);
	134
	135	return IRQ_HANDLED;
	136	}
	137
	138	static irqreturn_t as5011_axis_interrupt(int irq, void *dev_id)
	139	{
	140	struct as5011_device *as5011 = dev_id;
	141	int error;
	142	signed char x, y;
	143
	144	error = as5011_i2c_read(as5011->i2c_client, AS5011_X_RES_INT, &x);
	145	if (error < 0)
	146	goto out;
	147
	148	error = as5011_i2c_read(as5011->i2c_client, AS5011_Y_RES_INT, &y);
	149	if (error < 0)
	150	goto out;
	151
	152	input_report_abs(as5011->input_dev, ABS_X, x);
	153	input_report_abs(as5011->input_dev, ABS_Y, y);
	154	input_sync(as5011->input_dev);
	155
	156	out:
	157	return IRQ_HANDLED;
	158	}
	159
5298cc4c	160	static int as5011_configure_chip(struct as5011_device *as5011,
9d084a3d FM	161	const struct as5011_platform_data *plat_dat)
	162	{
	163	struct i2c_client *client = as5011->i2c_client;
	164	int error;
	165	signed char value;
	166
	167	/* chip soft reset */
	168	error = as5011_i2c_write(client, AS5011_CTRL1,
	169	AS5011_CTRL1_SOFT_RST);
	170	if (error < 0) {
	171	dev_err(&client->dev, "Soft reset failed\n");
	172	return error;
	173	}
	174
	175	mdelay(10);
	176
	177	error = as5011_i2c_write(client, AS5011_CTRL1,
	178	AS5011_CTRL1_LP_PULSED \|
	179	AS5011_CTRL1_LP_ACTIVE \|
	180	AS5011_CTRL1_INT_ACT_EN);
	181	if (error < 0) {
	182	dev_err(&client->dev, "Power config failed\n");
	183	return error;
	184	}
	185
	186	error = as5011_i2c_write(client, AS5011_CTRL2,
	187	AS5011_CTRL2_INV_SPINNING);
	188	if (error < 0) {
	189	dev_err(&client->dev, "Can't invert spinning\n");
	190	return error;
	191	}
	192
	193	/* write threshold */
	194	error = as5011_i2c_write(client, AS5011_XP, plat_dat->xp);
	195	if (error < 0) {
	196	dev_err(&client->dev, "Can't write threshold\n");
	197	return error;
	198	}
	199
	200	error = as5011_i2c_write(client, AS5011_XN, plat_dat->xn);
	201	if (error < 0) {
	202	dev_err(&client->dev, "Can't write threshold\n");
	203	return error;
	204	}
	205
	206	error = as5011_i2c_write(client, AS5011_YP, plat_dat->yp);
	207	if (error < 0) {
	208	dev_err(&client->dev, "Can't write threshold\n");
	209	return error;
	210	}
	211
	212	error = as5011_i2c_write(client, AS5011_YN, plat_dat->yn);
	213	if (error < 0) {
	214	dev_err(&client->dev, "Can't write threshold\n");
	215	return error;
	216	}
	217
	218	/* to free irq gpio in chip */
	219	error = as5011_i2c_read(client, AS5011_X_RES_INT, &value);
	220	if (error < 0) {
	221	dev_err(&client->dev, "Can't read i2c X resolution value\n");
	222	return error;
	223	}
	224
225	return 0;
226	}
227
5298cc4c BP	228	static int as5011_probe(struct i2c_client *client,
5298cc4c BP	229	const struct i2c_device_id *id)
9d084a3d FM	230	{
	231	const struct as5011_platform_data *plat_data;
	232	struct as5011_device *as5011;
	233	struct input_dev *input_dev;
	234	int irq;
	235	int error;
	236
	237	plat_data = client->dev.platform_data;
	238	if (!plat_data)
	239	return -EINVAL;
	240
	241	if (!plat_data->axis_irq) {
	242	dev_err(&client->dev, "No axis IRQ?\n");
	243	return -EINVAL;
	244	}
	245
	246	if (!i2c_check_functionality(client->adapter,
14674e70	247	I2C_FUNC_NOSTART \|
9d084a3d FM	248	I2C_FUNC_PROTOCOL_MANGLING)) {
	249	dev_err(&client->dev,
	250	"need i2c bus that supports protocol mangling\n");
	251	return -ENODEV;
	252	}
	253
	254	as5011 = kmalloc(sizeof(struct as5011_device), GFP_KERNEL);
	255	input_dev = input_allocate_device();
	256	if (!as5011 \|\| !input_dev) {
	257	dev_err(&client->dev,
	258	"Can't allocate memory for device structure\n");
	259	error = -ENOMEM;
	260	goto err_free_mem;
	261	}
	262
	263	as5011->i2c_client = client;
	264	as5011->input_dev = input_dev;
	265	as5011->button_gpio = plat_data->button_gpio;
	266	as5011->axis_irq = plat_data->axis_irq;
	267
	268	input_dev->name = "Austria Microsystem as5011 joystick";
	269	input_dev->id.bustype = BUS_I2C;
	270	input_dev->dev.parent = &client->dev;
	271
	272	__set_bit(EV_KEY, input_dev->evbit);
	273	__set_bit(EV_ABS, input_dev->evbit);
	274	__set_bit(BTN_JOYSTICK, input_dev->keybit);
	275
	276	input_set_abs_params(input_dev, ABS_X,
	277	AS5011_MIN_AXIS, AS5011_MAX_AXIS, AS5011_FUZZ, AS5011_FLAT);
	278	input_set_abs_params(as5011->input_dev, ABS_Y,
	279	AS5011_MIN_AXIS, AS5011_MAX_AXIS, AS5011_FUZZ, AS5011_FLAT);
	280
	281	error = gpio_request(as5011->button_gpio, "AS5011 button");
	282	if (error < 0) {
	283	dev_err(&client->dev, "Failed to request button gpio\n");
	284	goto err_free_mem;
	285	}
	286
	287	irq = gpio_to_irq(as5011->button_gpio);
	288	if (irq < 0) {
	289	dev_err(&client->dev,
	290	"Failed to get irq number for button gpio\n");
	291	goto err_free_button_gpio;
	292	}
	293
	294	as5011->button_irq = irq;
	295
	296	error = request_threaded_irq(as5011->button_irq,
	297	NULL, as5011_button_interrupt,
9b7e31bb LPC	298	IRQF_TRIGGER_RISING \|
9b7e31bb LPC	299	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
9d084a3d FM	300	"as5011_button", as5011);
	301	if (error < 0) {
	302	dev_err(&client->dev,
	303	"Can't allocate button irq %d\n", as5011->button_irq);
	304	goto err_free_button_gpio;
	305	}
	306
	307	error = as5011_configure_chip(as5011, plat_data);
	308	if (error)
	309	goto err_free_button_irq;
	310
	311	error = request_threaded_irq(as5011->axis_irq, NULL,
	312	as5011_axis_interrupt,
9b7e31bb	313	plat_data->axis_irqflags \| IRQF_ONESHOT,
9d084a3d FM	314	"as5011_joystick", as5011);
	315	if (error) {
	316	dev_err(&client->dev,
	317	"Can't allocate axis irq %d\n", plat_data->axis_irq);
	318	goto err_free_button_irq;
	319	}
	320
	321	error = input_register_device(as5011->input_dev);
	322	if (error) {
	323	dev_err(&client->dev, "Failed to register input device\n");
	324	goto err_free_axis_irq;
	325	}
	326
	327	i2c_set_clientdata(client, as5011);
	328
	329	return 0;
	330
	331	err_free_axis_irq:
	332	free_irq(as5011->axis_irq, as5011);
	333	err_free_button_irq:
	334	free_irq(as5011->button_irq, as5011);
	335	err_free_button_gpio:
	336	gpio_free(as5011->button_gpio);
	337	err_free_mem:
	338	input_free_device(input_dev);
	339	kfree(as5011);
	340
	341	return error;
	342	}
	343
e2619cf7	344	static int as5011_remove(struct i2c_client *client)
9d084a3d FM	345	{
	346	struct as5011_device *as5011 = i2c_get_clientdata(client);
	347
	348	free_irq(as5011->axis_irq, as5011);
	349	free_irq(as5011->button_irq, as5011);
	350	gpio_free(as5011->button_gpio);
	351
	352	input_unregister_device(as5011->input_dev);
	353	kfree(as5011);
	354
	355	return 0;
	356	}
	357
	358	static const struct i2c_device_id as5011_id[] = {
	359	{ MODULE_DEVICE_ALIAS, 0 },
	360	{ }
	361	};
	362	MODULE_DEVICE_TABLE(i2c, as5011_id);
	363
	364	static struct i2c_driver as5011_driver = {
	365	.driver = {
	366	.name = "as5011",
	367	},
	368	.probe = as5011_probe,
1cb0aa88	369	.remove = as5011_remove,
9d084a3d FM	370	.id_table = as5011_id,
	371	};
	372
1b92c1cf	373	module_i2c_driver(as5011_driver);