[linux-block.git] / drivers / mfd / cros_ec_dev.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * cros_ec_dev - expose the Chrome OS Embedded Controller to user-space
 *
 * Copyright (C) 2014 Google, Inc.
 */

#include <linux/dmi.h>
#include <linux/kconfig.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/platform_data/cros_ec_chardev.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/slab.h>

#define DRV_NAME "cros-ec-dev"

static struct class cros_class = {
	.owner          = THIS_MODULE,
	.name           = "chromeos",
};

/**
 * struct cros_feature_to_name - CrOS feature id to name/short description.
 * @id: The feature identifier.
 * @name: Device name associated with the feature id.
 * @desc: Short name that will be displayed.
 */
struct cros_feature_to_name {
	unsigned int id;
	const char *name;
	const char *desc;
};

/**
 * struct cros_feature_to_cells - CrOS feature id to mfd cells association.
 * @id: The feature identifier.
 * @mfd_cells: Pointer to the array of mfd cells that needs to be added.
 * @num_cells: Number of mfd cells into the array.
 */
struct cros_feature_to_cells {
	unsigned int id;
	const struct mfd_cell *mfd_cells;
	unsigned int num_cells;
};

static const struct cros_feature_to_name cros_mcu_devices[] = {
	{
		.id	= EC_FEATURE_FINGERPRINT,
		.name	= CROS_EC_DEV_FP_NAME,
		.desc	= "Fingerprint",
	},
	{
		.id	= EC_FEATURE_ISH,
		.name	= CROS_EC_DEV_ISH_NAME,
		.desc	= "Integrated Sensor Hub",
	},
	{
		.id	= EC_FEATURE_SCP,
		.name	= CROS_EC_DEV_SCP_NAME,
		.desc	= "System Control Processor",
	},
	{
		.id	= EC_FEATURE_TOUCHPAD,
		.name	= CROS_EC_DEV_TP_NAME,
		.desc	= "Touchpad",
	},
};

static const struct mfd_cell cros_ec_cec_cells[] = {
	{ .name = "cros-ec-cec", },
};

static const struct mfd_cell cros_ec_rtc_cells[] = {
	{ .name = "cros-ec-rtc", },
};

static const struct mfd_cell cros_ec_sensorhub_cells[] = {
	{ .name = "cros-ec-sensorhub", },
};

static const struct mfd_cell cros_usbpd_charger_cells[] = {
	{ .name = "cros-usbpd-charger", },
	{ .name = "cros-usbpd-logger", },
};

static const struct mfd_cell cros_usbpd_notify_cells[] = {
	{ .name = "cros-usbpd-notify", },
};

static const struct cros_feature_to_cells cros_subdevices[] = {
	{
		.id		= EC_FEATURE_CEC,
		.mfd_cells	= cros_ec_cec_cells,
		.num_cells	= ARRAY_SIZE(cros_ec_cec_cells),
	},
	{
		.id		= EC_FEATURE_RTC,
		.mfd_cells	= cros_ec_rtc_cells,
		.num_cells	= ARRAY_SIZE(cros_ec_rtc_cells),
	},
	{
		.id		= EC_FEATURE_USB_PD,
		.mfd_cells	= cros_usbpd_charger_cells,
		.num_cells	= ARRAY_SIZE(cros_usbpd_charger_cells),
	},
};

static const struct mfd_cell cros_ec_platform_cells[] = {
	{ .name = "cros-ec-chardev", },
	{ .name = "cros-ec-debugfs", },
	{ .name = "cros-ec-sysfs", },
	{ .name = "cros-ec-pchg", },
};

static const struct mfd_cell cros_ec_lightbar_cells[] = {
	{ .name = "cros-ec-lightbar", }
};

static const struct mfd_cell cros_ec_vbc_cells[] = {
	{ .name = "cros-ec-vbc", }
};

static void cros_ec_class_release(struct device *dev)
{
	kfree(to_cros_ec_dev(dev));
}

static int ec_device_probe(struct platform_device *pdev)
{
	int retval = -ENOMEM;
	struct device_node *node;
	struct device *dev = &pdev->dev;
	struct cros_ec_platform *ec_platform = dev_get_platdata(dev);
	struct cros_ec_dev *ec = kzalloc(sizeof(*ec), GFP_KERNEL);
	int i;

	if (!ec)
		return retval;

	dev_set_drvdata(dev, ec);
	ec->ec_dev = dev_get_drvdata(dev->parent);
	ec->dev = dev;
	ec->cmd_offset = ec_platform->cmd_offset;
	ec->features.flags[0] = -1U; /* Not cached yet */
	ec->features.flags[1] = -1U; /* Not cached yet */
	device_initialize(&ec->class_dev);

	for (i = 0; i < ARRAY_SIZE(cros_mcu_devices); i++) {
		/*
		 * Check whether this is actually a dedicated MCU rather
		 * than an standard EC.
		 */
		if (cros_ec_check_features(ec, cros_mcu_devices[i].id)) {
			dev_info(dev, "CrOS %s MCU detected\n",
				 cros_mcu_devices[i].desc);
			/*
			 * Help userspace differentiating ECs from other MCU,
			 * regardless of the probing order.
			 */
			ec_platform->ec_name = cros_mcu_devices[i].name;
			break;
		}
	}

	/*
	 * Add the class device
	 */
	ec->class_dev.class = &cros_class;
	ec->class_dev.parent = dev;
	ec->class_dev.release = cros_ec_class_release;

	retval = dev_set_name(&ec->class_dev, "%s", ec_platform->ec_name);
	if (retval) {
		dev_err(dev, "dev_set_name failed => %d\n", retval);
		goto failed;
	}

	retval = device_add(&ec->class_dev);
	if (retval)
		goto failed;

	/* check whether this EC is a sensor hub. */
	if (cros_ec_get_sensor_count(ec) > 0) {
		retval = mfd_add_hotplug_devices(ec->dev,
				cros_ec_sensorhub_cells,
				ARRAY_SIZE(cros_ec_sensorhub_cells));
		if (retval)
			dev_err(ec->dev, "failed to add %s subdevice: %d\n",
				cros_ec_sensorhub_cells->name, retval);
	}

	/*
	 * The following subdevices can be detected by sending the
	 * EC_FEATURE_GET_CMD Embedded Controller device.
	 */
	for (i = 0; i < ARRAY_SIZE(cros_subdevices); i++) {
		if (cros_ec_check_features(ec, cros_subdevices[i].id)) {
			retval = mfd_add_hotplug_devices(ec->dev,
						cros_subdevices[i].mfd_cells,
						cros_subdevices[i].num_cells);
			if (retval)
				dev_err(ec->dev,
					"failed to add %s subdevice: %d\n",
					cros_subdevices[i].mfd_cells->name,
					retval);
		}
	}

	/*
	 * Lightbar is a special case. Newer devices support autodetection,
	 * but older ones do not.
	 */
	if (cros_ec_check_features(ec, EC_FEATURE_LIGHTBAR) ||
	    dmi_match(DMI_PRODUCT_NAME, "Link")) {
		retval = mfd_add_hotplug_devices(ec->dev,
					cros_ec_lightbar_cells,
					ARRAY_SIZE(cros_ec_lightbar_cells));
		if (retval)
			dev_warn(ec->dev, "failed to add lightbar: %d\n",
				 retval);
	}

	/*
	 * The PD notifier driver cell is separate since it only needs to be
	 * explicitly added on platforms that don't have the PD notifier ACPI
	 * device entry defined.
	 */
	if (IS_ENABLED(CONFIG_OF) && ec->ec_dev->dev->of_node) {
		if (cros_ec_check_features(ec, EC_FEATURE_USB_PD)) {
			retval = mfd_add_hotplug_devices(ec->dev,
					cros_usbpd_notify_cells,
					ARRAY_SIZE(cros_usbpd_notify_cells));
			if (retval)
				dev_err(ec->dev,
					"failed to add PD notify devices: %d\n",
					retval);
		}
	}

	/*
	 * The following subdevices cannot be detected by sending the
	 * EC_FEATURE_GET_CMD to the Embedded Controller device.
	 */
	retval = mfd_add_hotplug_devices(ec->dev, cros_ec_platform_cells,
					 ARRAY_SIZE(cros_ec_platform_cells));
	if (retval)
		dev_warn(ec->dev,
			 "failed to add cros-ec platform devices: %d\n",
			 retval);

	/* Check whether this EC instance has a VBC NVRAM */
	node = ec->ec_dev->dev->of_node;
	if (of_property_read_bool(node, "google,has-vbc-nvram")) {
		retval = mfd_add_hotplug_devices(ec->dev, cros_ec_vbc_cells,
						ARRAY_SIZE(cros_ec_vbc_cells));
		if (retval)
			dev_warn(ec->dev, "failed to add VBC devices: %d\n",
				 retval);
	}

	return 0;

failed:
	put_device(&ec->class_dev);
	return retval;
}

static int ec_device_remove(struct platform_device *pdev)
{
	struct cros_ec_dev *ec = dev_get_drvdata(&pdev->dev);

	mfd_remove_devices(ec->dev);
	device_unregister(&ec->class_dev);
	return 0;
}

static const struct platform_device_id cros_ec_id[] = {
	{ DRV_NAME, 0 },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, cros_ec_id);

static struct platform_driver cros_ec_dev_driver = {
	.driver = {
		.name = DRV_NAME,
	},
	.id_table = cros_ec_id,
	.probe = ec_device_probe,
	.remove = ec_device_remove,
};

static int __init cros_ec_dev_init(void)
{
	int ret;

	ret  = class_register(&cros_class);
	if (ret) {
		pr_err(CROS_EC_DEV_NAME ": failed to register device class\n");
		return ret;
	}

	/* Register the driver */
	ret = platform_driver_register(&cros_ec_dev_driver);
	if (ret < 0) {
		pr_warn(CROS_EC_DEV_NAME ": can't register driver: %d\n", ret);
		goto failed_devreg;
	}
	return 0;

failed_devreg:
	class_unregister(&cros_class);
	return ret;
}

static void __exit cros_ec_dev_exit(void)
{
	platform_driver_unregister(&cros_ec_dev_driver);
	class_unregister(&cros_class);
}

module_init(cros_ec_dev_init);
module_exit(cros_ec_dev_exit);

MODULE_AUTHOR("Bill Richardson <wfrichar@chromium.org>");
MODULE_DESCRIPTION("Userspace interface to the Chrome OS Embedded Controller");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");
Commit	Line	Data
1ccea77e	1	// SPDX-License-Identifier: GPL-2.0-or-later
e7c256fb BR	2	/*
	3	* cros_ec_dev - expose the Chrome OS Embedded Controller to user-space
	4	*
	5	* Copyright (C) 2014 Google, Inc.
e7c256fb BR	6	*/
e7c256fb BR	7
a75f4d1f	8	#include <linux/dmi.h>
4602dce0	9	#include <linux/kconfig.h>
5668bfdd	10	#include <linux/mfd/core.h>
e7c256fb	11	#include <linux/module.h>
ac316725	12	#include <linux/mod_devicetable.h>
0545625b	13	#include <linux/of_platform.h>
e7c256fb	14	#include <linux/platform_device.h>
459aedb9	15	#include <linux/platform_data/cros_ec_chardev.h>
840d9f13 EBS	16	#include <linux/platform_data/cros_ec_commands.h>
840d9f13 EBS	17	#include <linux/platform_data/cros_ec_proto.h>
a8411784	18	#include <linux/slab.h>
e7c256fb	19
ea01a31b TE	20	#define DRV_NAME "cros-ec-dev"
ea01a31b TE	21
57b33ff0 GG	22	static struct class cros_class = {
	23	.owner = THIS_MODULE,
	24	.name = "chromeos",
57b33ff0 GG	25	};
57b33ff0 GG	26
b027dcf7	27	/**
5ae3d1bc	28	* struct cros_feature_to_name - CrOS feature id to name/short description.
b027dcf7 EBS	29	* @id: The feature identifier.
	30	* @name: Device name associated with the feature id.
	31	* @desc: Short name that will be displayed.
	32	*/
	33	struct cros_feature_to_name {
	34	unsigned int id;
	35	const char *name;
	36	const char *desc;
	37	};
	38
832a636f	39	/**
5ae3d1bc	40	* struct cros_feature_to_cells - CrOS feature id to mfd cells association.
832a636f EBS	41	* @id: The feature identifier.
	42	* @mfd_cells: Pointer to the array of mfd cells that needs to be added.
	43	* @num_cells: Number of mfd cells into the array.
	44	*/
	45	struct cros_feature_to_cells {
	46	unsigned int id;
	47	const struct mfd_cell *mfd_cells;
	48	unsigned int num_cells;
	49	};
	50
b027dcf7 EBS	51	static const struct cros_feature_to_name cros_mcu_devices[] = {
	52	{
	53	.id = EC_FEATURE_FINGERPRINT,
	54	.name = CROS_EC_DEV_FP_NAME,
	55	.desc = "Fingerprint",
	56	},
	57	{
	58	.id = EC_FEATURE_ISH,
	59	.name = CROS_EC_DEV_ISH_NAME,
	60	.desc = "Integrated Sensor Hub",
	61	},
	62	{
	63	.id = EC_FEATURE_SCP,
	64	.name = CROS_EC_DEV_SCP_NAME,
	65	.desc = "System Control Processor",
	66	},
	67	{
	68	.id = EC_FEATURE_TOUCHPAD,
	69	.name = CROS_EC_DEV_TP_NAME,
	70	.desc = "Touchpad",
	71	},
	72	};
	73
832a636f EBS	74	static const struct mfd_cell cros_ec_cec_cells[] = {
	75	{ .name = "cros-ec-cec", },
	76	};
	77
	78	static const struct mfd_cell cros_ec_rtc_cells[] = {
	79	{ .name = "cros-ec-rtc", },
	80	};
	81
d60ac88a GG	82	static const struct mfd_cell cros_ec_sensorhub_cells[] = {
	83	{ .name = "cros-ec-sensorhub", },
	84	};
	85
832a636f EBS	86	static const struct mfd_cell cros_usbpd_charger_cells[] = {
	87	{ .name = "cros-usbpd-charger", },
	88	{ .name = "cros-usbpd-logger", },
	89	};
	90
4602dce0 PM	91	static const struct mfd_cell cros_usbpd_notify_cells[] = {
	92	{ .name = "cros-usbpd-notify", },
	93	};
	94
832a636f EBS	95	static const struct cros_feature_to_cells cros_subdevices[] = {
	96	{
	97	.id = EC_FEATURE_CEC,
	98	.mfd_cells = cros_ec_cec_cells,
	99	.num_cells = ARRAY_SIZE(cros_ec_cec_cells),
	100	},
	101	{
	102	.id = EC_FEATURE_RTC,
	103	.mfd_cells = cros_ec_rtc_cells,
	104	.num_cells = ARRAY_SIZE(cros_ec_rtc_cells),
	105	},
	106	{
	107	.id = EC_FEATURE_USB_PD,
	108	.mfd_cells = cros_usbpd_charger_cells,
	109	.num_cells = ARRAY_SIZE(cros_usbpd_charger_cells),
	110	},
	111	};
	112
	113	static const struct mfd_cell cros_ec_platform_cells[] = {
	114	{ .name = "cros-ec-chardev", },
	115	{ .name = "cros-ec-debugfs", },
832a636f	116	{ .name = "cros-ec-sysfs", },
8a14ded5	117	{ .name = "cros-ec-pchg", },
832a636f EBS	118	};
832a636f EBS	119
a75f4d1f GG	120	static const struct mfd_cell cros_ec_lightbar_cells[] = {
	121	{ .name = "cros-ec-lightbar", }
	122	};
	123
832a636f EBS	124	static const struct mfd_cell cros_ec_vbc_cells[] = {
	125	{ .name = "cros-ec-vbc", }
	126	};
	127
48a2ca0e EBS	128	static void cros_ec_class_release(struct device *dev)
	129	{
	130	kfree(to_cros_ec_dev(dev));
	131	}
	132
e7c256fb BR	133	static int ec_device_probe(struct platform_device *pdev)
e7c256fb BR	134	{
57b33ff0	135	int retval = -ENOMEM;
0545625b	136	struct device_node *node;
57b33ff0 GG	137	struct device *dev = &pdev->dev;
57b33ff0 GG	138	struct cros_ec_platform *ec_platform = dev_get_platdata(dev);
48a2ca0e	139	struct cros_ec_dev ec = kzalloc(sizeof(ec), GFP_KERNEL);
b027dcf7	140	int i;
57b33ff0 GG	141
	142	if (!ec)
	143	return retval;
e7c256fb	144
57b33ff0 GG	145	dev_set_drvdata(dev, ec);
	146	ec->ec_dev = dev_get_drvdata(dev->parent);
	147	ec->dev = dev;
	148	ec->cmd_offset = ec_platform->cmd_offset;
7ff22787 PM	149	ec->features.flags[0] = -1U; /* Not cached yet */
7ff22787 PM	150	ec->features.flags[1] = -1U; /* Not cached yet */
57b33ff0	151	device_initialize(&ec->class_dev);
e7c256fb	152
b027dcf7	153	for (i = 0; i < ARRAY_SIZE(cros_mcu_devices); i++) {
90486af5	154	/*
b027dcf7 EBS	155	* Check whether this is actually a dedicated MCU rather
b027dcf7 EBS	156	* than an standard EC.
90486af5	157	*/
b027dcf7 EBS	158	if (cros_ec_check_features(ec, cros_mcu_devices[i].id)) {
	159	dev_info(dev, "CrOS %s MCU detected\n",
	160	cros_mcu_devices[i].desc);
	161	/*
	162	* Help userspace differentiating ECs from other MCU,
	163	* regardless of the probing order.
	164	*/
	165	ec_platform->ec_name = cros_mcu_devices[i].name;
	166	break;
	167	}
554e937e PHS	168	}
554e937e PHS	169
57b33ff0 GG	170	/*
57b33ff0 GG	171	* Add the class device
57b33ff0	172	*/
57b33ff0 GG	173	ec->class_dev.class = &cros_class;
57b33ff0 GG	174	ec->class_dev.parent = dev;
48a2ca0e	175	ec->class_dev.release = cros_ec_class_release;
57b33ff0 GG	176
	177	retval = dev_set_name(&ec->class_dev, "%s", ec_platform->ec_name);
	178	if (retval) {
	179	dev_err(dev, "dev_set_name failed => %d\n", retval);
1c1d152c	180	goto failed;
e7c256fb BR	181	}
e7c256fb BR	182
459aedb9 EBS	183	retval = device_add(&ec->class_dev);
	184	if (retval)
	185	goto failed;
	186
c1d1e91a	187	/* check whether this EC is a sensor hub. */
d60ac88a GG	188	if (cros_ec_get_sensor_count(ec) > 0) {
	189	retval = mfd_add_hotplug_devices(ec->dev,
	190	cros_ec_sensorhub_cells,
	191	ARRAY_SIZE(cros_ec_sensorhub_cells));
	192	if (retval)
	193	dev_err(ec->dev, "failed to add %s subdevice: %d\n",
	194	cros_ec_sensorhub_cells->name, retval);
	195	}
c1d1e91a	196
832a636f EBS	197	/*
	198	* The following subdevices can be detected by sending the
	199	* EC_FEATURE_GET_CMD Embedded Controller device.
	200	*/
	201	for (i = 0; i < ARRAY_SIZE(cros_subdevices); i++) {
	202	if (cros_ec_check_features(ec, cros_subdevices[i].id)) {
	203	retval = mfd_add_hotplug_devices(ec->dev,
	204	cros_subdevices[i].mfd_cells,
	205	cros_subdevices[i].num_cells);
	206	if (retval)
	207	dev_err(ec->dev,
	208	"failed to add %s subdevice: %d\n",
	209	cros_subdevices[i].mfd_cells->name,
	210	retval);
	211	}
3144dce7 EBS	212	}
3144dce7 EBS	213
a75f4d1f GG	214	/*
	215	* Lightbar is a special case. Newer devices support autodetection,
	216	* but older ones do not.
	217	*/
	218	if (cros_ec_check_features(ec, EC_FEATURE_LIGHTBAR) \|\|
	219	dmi_match(DMI_PRODUCT_NAME, "Link")) {
	220	retval = mfd_add_hotplug_devices(ec->dev,
	221	cros_ec_lightbar_cells,
	222	ARRAY_SIZE(cros_ec_lightbar_cells));
	223	if (retval)
	224	dev_warn(ec->dev, "failed to add lightbar: %d\n",
	225	retval);
	226	}
	227
4602dce0 PM	228	/*
	229	* The PD notifier driver cell is separate since it only needs to be
	230	* explicitly added on platforms that don't have the PD notifier ACPI
	231	* device entry defined.
	232	*/
f8db89d1	233	if (IS_ENABLED(CONFIG_OF) && ec->ec_dev->dev->of_node) {
4602dce0 PM	234	if (cros_ec_check_features(ec, EC_FEATURE_USB_PD)) {
	235	retval = mfd_add_hotplug_devices(ec->dev,
	236	cros_usbpd_notify_cells,
	237	ARRAY_SIZE(cros_usbpd_notify_cells));
	238	if (retval)
	239	dev_err(ec->dev,
	240	"failed to add PD notify devices: %d\n",
	241	retval);
	242	}
	243	}
	244
832a636f EBS	245	/*
	246	* The following subdevices cannot be detected by sending the
	247	* EC_FEATURE_GET_CMD to the Embedded Controller device.
	248	*/
28e6fcc8 EBS	249	retval = mfd_add_hotplug_devices(ec->dev, cros_ec_platform_cells,
28e6fcc8 EBS	250	ARRAY_SIZE(cros_ec_platform_cells));
ecf8a6cd EBS	251	if (retval)
	252	dev_warn(ec->dev,
	253	"failed to add cros-ec platform devices: %d\n",
	254	retval);
	255
0545625b EBS	256	/* Check whether this EC instance has a VBC NVRAM */
	257	node = ec->ec_dev->dev->of_node;
	258	if (of_property_read_bool(node, "google,has-vbc-nvram")) {
28e6fcc8 EBS	259	retval = mfd_add_hotplug_devices(ec->dev, cros_ec_vbc_cells,
28e6fcc8 EBS	260	ARRAY_SIZE(cros_ec_vbc_cells));
0545625b EBS	261	if (retval)
	262	dev_warn(ec->dev, "failed to add VBC devices: %d\n",
	263	retval);
	264	}
	265
e7c256fb	266	return 0;
57b33ff0	267
1c1d152c LG	268	failed:
1c1d152c LG	269	put_device(&ec->class_dev);
57b33ff0	270	return retval;
e7c256fb BR	271	}
	272
	273	static int ec_device_remove(struct platform_device *pdev)
	274	{
57b33ff0	275	struct cros_ec_dev *ec = dev_get_drvdata(&pdev->dev);
e8626459	276
18e294dd	277	mfd_remove_devices(ec->dev);
57b33ff0	278	device_unregister(&ec->class_dev);
e7c256fb BR	279	return 0;
	280	}
	281
afbf8ec7	282	static const struct platform_device_id cros_ec_id[] = {
ea01a31b	283	{ DRV_NAME, 0 },
abeed71b	284	{ /* sentinel */ }
afbf8ec7 JMC	285	};
	286	MODULE_DEVICE_TABLE(platform, cros_ec_id);
	287
e7c256fb BR	288	static struct platform_driver cros_ec_dev_driver = {
e7c256fb BR	289	.driver = {
ea01a31b	290	.name = DRV_NAME,
e7c256fb	291	},
6eb35784	292	.id_table = cros_ec_id,
e7c256fb BR	293	.probe = ec_device_probe,
	294	.remove = ec_device_remove,
	295	};
	296
	297	static int __init cros_ec_dev_init(void)
	298	{
	299	int ret;
e7c256fb	300
57b33ff0 GG	301	ret = class_register(&cros_class);
57b33ff0 GG	302	if (ret) {
e7c256fb	303	pr_err(CROS_EC_DEV_NAME ": failed to register device class\n");
57b33ff0	304	return ret;
e7c256fb BR	305	}
e7c256fb BR	306
e7c256fb BR	307	/* Register the driver */
	308	ret = platform_driver_register(&cros_ec_dev_driver);
	309	if (ret < 0) {
	310	pr_warn(CROS_EC_DEV_NAME ": can't register driver: %d\n", ret);
	311	goto failed_devreg;
	312	}
	313	return 0;
	314
	315	failed_devreg:
57b33ff0	316	class_unregister(&cros_class);
e7c256fb BR	317	return ret;
	318	}
	319
	320	static void __exit cros_ec_dev_exit(void)
	321	{
	322	platform_driver_unregister(&cros_ec_dev_driver);
57b33ff0	323	class_unregister(&cros_class);
e7c256fb BR	324	}
	325
	326	module_init(cros_ec_dev_init);
	327	module_exit(cros_ec_dev_exit);
	328
	329	MODULE_AUTHOR("Bill Richardson <wfrichar@chromium.org>");
	330	MODULE_DESCRIPTION("Userspace interface to the Chrome OS Embedded Controller");
	331	MODULE_VERSION("1.0");
	332	MODULE_LICENSE("GPL");