[mirror_ubuntu-artful-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>

#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 = {
		client->addr, I2C_M_IGNORE_NAK, 2, (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] = {
		{ client->addr, I2C_M_REV_DIR_ADDR, 1, (uint8_t *)data },
		{ client->addr, I2C_M_RD | I2C_M_NOSTART, 1, (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 __devinit 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 __devinit 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_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,
				     "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,
				     "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 __devexit 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		= __devexit_p(as5011_remove),
	.id_table	= as5011_id,
};

static int __init as5011_init(void)
{
	return i2c_add_driver(&as5011_driver);
}
module_init(as5011_init);

static void __exit as5011_exit(void)
{
	i2c_del_driver(&as5011_driver);
}
module_exit(as5011_exit);
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>
	33
	34	#define DRIVER_DESC "Driver for Austria Microsystems AS5011 joystick"
	35	#define MODULE_DEVICE_ALIAS "as5011"
	36
	37	MODULE_AUTHOR("Fabien Marteau <fabien.marteau@armadeus.com>");
	38	MODULE_DESCRIPTION(DRIVER_DESC);
	39	MODULE_LICENSE("GPL");
	40
	41	/* registers */
	42	#define AS5011_CTRL1 0x76
	43	#define AS5011_CTRL2 0x75
	44	#define AS5011_XP 0x43
	45	#define AS5011_XN 0x44
	46	#define AS5011_YP 0x53
	47	#define AS5011_YN 0x54
	48	#define AS5011_X_REG 0x41
	49	#define AS5011_Y_REG 0x42
	50	#define AS5011_X_RES_INT 0x51
	51	#define AS5011_Y_RES_INT 0x52
	52
	53	/* CTRL1 bits */
	54	#define AS5011_CTRL1_LP_PULSED 0x80
	55	#define AS5011_CTRL1_LP_ACTIVE 0x40
	56	#define AS5011_CTRL1_LP_CONTINUE 0x20
	57	#define AS5011_CTRL1_INT_WUP_EN 0x10
	58	#define AS5011_CTRL1_INT_ACT_EN 0x08
	59	#define AS5011_CTRL1_EXT_CLK_EN 0x04
	60	#define AS5011_CTRL1_SOFT_RST 0x02
	61	#define AS5011_CTRL1_DATA_VALID 0x01
	62
	63	/* CTRL2 bits */
	64	#define AS5011_CTRL2_EXT_SAMPLE_EN 0x08
65	#define AS5011_CTRL2_RC_BIAS_ON 0x04
66	#define AS5011_CTRL2_INV_SPINNING 0x02
67
68	#define AS5011_MAX_AXIS 80
69	#define AS5011_MIN_AXIS (-80)
70	#define AS5011_FUZZ 8
71	#define AS5011_FLAT 40
72
73	struct as5011_device {
74	struct input_dev *input_dev;
75	struct i2c_client *i2c_client;
76	unsigned int button_gpio;
77	unsigned int button_irq;
78	unsigned int axis_irq;
79	};
80
81	static int as5011_i2c_write(struct i2c_client *client,
82	uint8_t aregaddr,
83	uint8_t avalue)
84	{
85	uint8_t data[2] = { aregaddr, avalue };
86	struct i2c_msg msg = {
87	client->addr, I2C_M_IGNORE_NAK, 2, (uint8_t *)data
88	};
89	int error;
90
91	error = i2c_transfer(client->adapter, &msg, 1);
92	return error < 0 ? error : 0;
93	}
94
95	static int as5011_i2c_read(struct i2c_client *client,
96	uint8_t aregaddr, signed char *value)
97	{
98	uint8_t data[2] = { aregaddr };
99	struct i2c_msg msg_set[2] = {
100	{ client->addr, I2C_M_REV_DIR_ADDR, 1, (uint8_t *)data },
101	{ client->addr, I2C_M_RD \| I2C_M_NOSTART, 1, (uint8_t *)data }
102	};
103	int error;
104
105	error = i2c_transfer(client->adapter, msg_set, 2);
106	if (error < 0)
107	return error;
108
109	value = data[0] & 0x80 ? -1 (1 + ~data[0]) : data[0];
110	return 0;
111	}
112
113	static irqreturn_t as5011_button_interrupt(int irq, void *dev_id)
114	{
115	struct as5011_device *as5011 = dev_id;
116	int val = gpio_get_value_cansleep(as5011->button_gpio);
117
118	input_report_key(as5011->input_dev, BTN_JOYSTICK, !val);
119	input_sync(as5011->input_dev);
120
121	return IRQ_HANDLED;
122	}
123
124	static irqreturn_t as5011_axis_interrupt(int irq, void *dev_id)
125	{
126	struct as5011_device *as5011 = dev_id;
127	int error;
128	signed char x, y;
129
130	error = as5011_i2c_read(as5011->i2c_client, AS5011_X_RES_INT, &x);
131	if (error < 0)
132	goto out;
133
134	error = as5011_i2c_read(as5011->i2c_client, AS5011_Y_RES_INT, &y);
135	if (error < 0)
136	goto out;
137
138	input_report_abs(as5011->input_dev, ABS_X, x);
139	input_report_abs(as5011->input_dev, ABS_Y, y);
140	input_sync(as5011->input_dev);
141
142	out:
143	return IRQ_HANDLED;
144	}
145
146	static int __devinit as5011_configure_chip(struct as5011_device *as5011,
147	const struct as5011_platform_data *plat_dat)
148	{
149	struct i2c_client *client = as5011->i2c_client;
150	int error;
151	signed char value;
152
153	/* chip soft reset */
154	error = as5011_i2c_write(client, AS5011_CTRL1,
155	AS5011_CTRL1_SOFT_RST);
156	if (error < 0) {
157	dev_err(&client->dev, "Soft reset failed\n");
158	return error;
159	}
160
161	mdelay(10);
162
163	error = as5011_i2c_write(client, AS5011_CTRL1,
164	AS5011_CTRL1_LP_PULSED \|
165	AS5011_CTRL1_LP_ACTIVE \|
166	AS5011_CTRL1_INT_ACT_EN);
167	if (error < 0) {
168	dev_err(&client->dev, "Power config failed\n");
169	return error;
170	}
171
172	error = as5011_i2c_write(client, AS5011_CTRL2,
173	AS5011_CTRL2_INV_SPINNING);
174	if (error < 0) {
175	dev_err(&client->dev, "Can't invert spinning\n");
176	return error;
177	}
178
179	/* write threshold */
180	error = as5011_i2c_write(client, AS5011_XP, plat_dat->xp);
181	if (error < 0) {
182	dev_err(&client->dev, "Can't write threshold\n");
183	return error;
184	}
185
186	error = as5011_i2c_write(client, AS5011_XN, plat_dat->xn);
187	if (error < 0) {
188	dev_err(&client->dev, "Can't write threshold\n");
189	return error;
190	}
191
192	error = as5011_i2c_write(client, AS5011_YP, plat_dat->yp);
193	if (error < 0) {
194	dev_err(&client->dev, "Can't write threshold\n");
195	return error;
196	}
197
198	error = as5011_i2c_write(client, AS5011_YN, plat_dat->yn);
199	if (error < 0) {
200	dev_err(&client->dev, "Can't write threshold\n");
201	return error;
202	}
203
204	/* to free irq gpio in chip */
205	error = as5011_i2c_read(client, AS5011_X_RES_INT, &value);
206	if (error < 0) {
207	dev_err(&client->dev, "Can't read i2c X resolution value\n");
208	return error;
209	}
210
211	return 0;
212	}
213
214	static int __devinit as5011_probe(struct i2c_client *client,
215	const struct i2c_device_id *id)
216	{
217	const struct as5011_platform_data *plat_data;
218	struct as5011_device *as5011;
219	struct input_dev *input_dev;
220	int irq;
221	int error;
222
223	plat_data = client->dev.platform_data;
224	if (!plat_data)
225	return -EINVAL;
226
227	if (!plat_data->axis_irq) {
228	dev_err(&client->dev, "No axis IRQ?\n");
229	return -EINVAL;
230	}
231
232	if (!i2c_check_functionality(client->adapter,
233	I2C_FUNC_PROTOCOL_MANGLING)) {
234	dev_err(&client->dev,
235	"need i2c bus that supports protocol mangling\n");
236	return -ENODEV;
237	}
238
239	as5011 = kmalloc(sizeof(struct as5011_device), GFP_KERNEL);
240	input_dev = input_allocate_device();
241	if (!as5011 \|\| !input_dev) {
242	dev_err(&client->dev,
243	"Can't allocate memory for device structure\n");
244	error = -ENOMEM;
245	goto err_free_mem;
246	}
247
248	as5011->i2c_client = client;
249	as5011->input_dev = input_dev;
250	as5011->button_gpio = plat_data->button_gpio;
251	as5011->axis_irq = plat_data->axis_irq;
252
253	input_dev->name = "Austria Microsystem as5011 joystick";
254	input_dev->id.bustype = BUS_I2C;
255	input_dev->dev.parent = &client->dev;
256
257	__set_bit(EV_KEY, input_dev->evbit);
258	__set_bit(EV_ABS, input_dev->evbit);
259	__set_bit(BTN_JOYSTICK, input_dev->keybit);
260
261	input_set_abs_params(input_dev, ABS_X,
262	AS5011_MIN_AXIS, AS5011_MAX_AXIS, AS5011_FUZZ, AS5011_FLAT);
263	input_set_abs_params(as5011->input_dev, ABS_Y,
264	AS5011_MIN_AXIS, AS5011_MAX_AXIS, AS5011_FUZZ, AS5011_FLAT);
265
266	error = gpio_request(as5011->button_gpio, "AS5011 button");
267	if (error < 0) {
268	dev_err(&client->dev, "Failed to request button gpio\n");
269	goto err_free_mem;
270	}
271
272	irq = gpio_to_irq(as5011->button_gpio);
273	if (irq < 0) {
274	dev_err(&client->dev,
275	"Failed to get irq number for button gpio\n");
276	goto err_free_button_gpio;
277	}
278
279	as5011->button_irq = irq;
280
281	error = request_threaded_irq(as5011->button_irq,
282	NULL, as5011_button_interrupt,
283	IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
284	"as5011_button", as5011);
285	if (error < 0) {
286	dev_err(&client->dev,
287	"Can't allocate button irq %d\n", as5011->button_irq);
288	goto err_free_button_gpio;
289	}
290
291	error = as5011_configure_chip(as5011, plat_data);
292	if (error)
293	goto err_free_button_irq;
294
295	error = request_threaded_irq(as5011->axis_irq, NULL,
296	as5011_axis_interrupt,
297	plat_data->axis_irqflags,
298	"as5011_joystick", as5011);
299	if (error) {
300	dev_err(&client->dev,
301	"Can't allocate axis irq %d\n", plat_data->axis_irq);
302	goto err_free_button_irq;
303	}
304
305	error = input_register_device(as5011->input_dev);
306	if (error) {
307	dev_err(&client->dev, "Failed to register input device\n");
308	goto err_free_axis_irq;
309	}
310
311	i2c_set_clientdata(client, as5011);
312
313	return 0;
314
315	err_free_axis_irq:
316	free_irq(as5011->axis_irq, as5011);
317	err_free_button_irq:
318	free_irq(as5011->button_irq, as5011);
319	err_free_button_gpio:
320	gpio_free(as5011->button_gpio);
321	err_free_mem:
322	input_free_device(input_dev);
323	kfree(as5011);
324
325	return error;
326	}
327
328	static int __devexit as5011_remove(struct i2c_client *client)
329	{
330	struct as5011_device *as5011 = i2c_get_clientdata(client);
331
332	free_irq(as5011->axis_irq, as5011);
333	free_irq(as5011->button_irq, as5011);
334	gpio_free(as5011->button_gpio);
335
336	input_unregister_device(as5011->input_dev);
337	kfree(as5011);
338
339	return 0;
340	}
341
342	static const struct i2c_device_id as5011_id[] = {
343	{ MODULE_DEVICE_ALIAS, 0 },
344	{ }
345	};
346	MODULE_DEVICE_TABLE(i2c, as5011_id);
347
348	static struct i2c_driver as5011_driver = {
349	.driver = {
350	.name = "as5011",
351	},
352	.probe = as5011_probe,
353	.remove = __devexit_p(as5011_remove),
354	.id_table = as5011_id,
355	};
356
357	static int __init as5011_init(void)
358	{
359	return i2c_add_driver(&as5011_driver);
360	}
361	module_init(as5011_init);
362
363	static void __exit as5011_exit(void)
364	{
365	i2c_del_driver(&as5011_driver);
366	}
367	module_exit(as5011_exit);