// SPDX-License-Identifier: GPL-2.0-or-later/* * ChromeOS Embedded Controller * * Copyright (C) 2014 Google, Inc. */ #include <linux/acpi.h>#include <linux/dmi.h>#include <linux/kconfig.h>#include <linux/mfd/core.h>#include <linux/module.h>#include <linux/of.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 = { .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_gpio_cells[] = { { .name = "cros-ec-gpio", },}; 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 mfd_cell cros_ec_wdt_cells[] = { { .name = "cros-ec-wdt", }}; static const struct mfd_cell cros_ec_led_cells[] = { { .name = "cros-ec-led", },}; static const struct mfd_cell cros_ec_keyboard_leds_cells[] = { { .name = "cros-keyboard-leds", },}; static const struct mfd_cell cros_ec_ucsi_cells[] = { { .name = "cros_ec_ucsi", },}; static const struct mfd_cell cros_ec_charge_control_cells[] = { { .name = "cros-charge-control", },}; 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_GPIO, .mfd_cells = cros_ec_gpio_cells, .num_cells = ARRAY_SIZE(cros_ec_gpio_cells), }, { .id = EC_FEATURE_RTC, .mfd_cells = cros_ec_rtc_cells, .num_cells = ARRAY_SIZE(cros_ec_rtc_cells), }, { .id = EC_FEATURE_HANG_DETECT, .mfd_cells = cros_ec_wdt_cells, .num_cells = ARRAY_SIZE(cros_ec_wdt_cells), }, { .id = EC_FEATURE_LED, .mfd_cells = cros_ec_led_cells, .num_cells = ARRAY_SIZE(cros_ec_led_cells), }, { .id = EC_FEATURE_PWM_KEYB, .mfd_cells = cros_ec_keyboard_leds_cells, .num_cells = ARRAY_SIZE(cros_ec_keyboard_leds_cells), }, { .id = EC_FEATURE_CHARGER, .mfd_cells = cros_ec_charge_control_cells, .num_cells = ARRAY_SIZE(cros_ec_charge_control_cells), },}; static const struct mfd_cell cros_ec_platform_cells[] = { { .name = "cros-ec-chardev", }, { .name = "cros-ec-debugfs", }, { .name = "cros-ec-hwmon", }, { .name = "cros-ec-sysfs", },}; static const struct mfd_cell cros_ec_pchg_cells[] = { { .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_obj(*ec); struct ec_response_pchg_count pchg_count; int i; if (!ec) return retval; 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); /* * Add the class device */ ec->class_dev.class = &cros_class; ec->class_dev.parent = dev; ec->class_dev.release = cros_ec_class_release; retval = cros_ec_read_features(ec); if (retval < 0) goto failed; 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; } } 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; dev_set_drvdata(dev, ec); /* 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); } } /* * FW nodes can load cros_ec_ucsi, but early PDC devices did not define * the required nodes. On PDC systems without FW nodes for cros_ec_ucsi, * the driver should be added as an mfd subdevice. */ if (cros_ec_check_features(ec, EC_FEATURE_USB_PD) && cros_ec_check_features(ec, EC_FEATURE_UCSI_PPM) && !acpi_dev_found("GOOG0021") && !of_find_compatible_node(NULL, NULL, "google,cros-ec-ucsi")) { retval = mfd_add_hotplug_devices(ec->dev, cros_ec_ucsi_cells, ARRAY_SIZE(cros_ec_ucsi_cells)); if (retval) dev_warn(ec->dev, "failed to add cros_ec_ucsi: %d\n", retval); } /* * UCSI provides power supply information so we don't need to separately * load the cros_usbpd_charger driver. */ if (cros_ec_check_features(ec, EC_FEATURE_USB_PD) && !cros_ec_check_features(ec, EC_FEATURE_UCSI_PPM)) { retval = mfd_add_hotplug_devices(ec->dev, cros_usbpd_charger_cells, ARRAY_SIZE(cros_usbpd_charger_cells)); if (retval) dev_warn(ec->dev, "failed to add usbpd-charger: %d\n", 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 PCHG device cannot be detected by sending EC_FEATURE_GET_CMD, but * it can be detected by querying the number of peripheral chargers. */ retval = cros_ec_cmd(ec->ec_dev, 0, EC_CMD_PCHG_COUNT, NULL, 0, &pchg_count, sizeof(pchg_count)); if (retval >= 0 && pchg_count.port_count) { retval = mfd_add_hotplug_devices(ec->dev, cros_ec_pchg_cells, ARRAY_SIZE(cros_ec_pchg_cells)); if (retval) dev_warn(ec->dev, "failed to add pchg: %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 void 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);} 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; } ret = platform_driver_register(&cros_ec_dev_driver); if (ret) { pr_warn(CROS_EC_DEV_NAME ": can't register driver: %d\n", ret); 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("ChromeOS Embedded Controller");MODULE_VERSION("1.0");MODULE_LICENSE("GPL");
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ChromeOS Embedded Controller
*
* Copyright (C) 2014 Google, Inc.
*/
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/kconfig.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.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 = {
.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_gpio_cells[] = {
{ .name = "cros-ec-gpio", },
};
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 mfd_cell cros_ec_wdt_cells[] = {
{ .name = "cros-ec-wdt", }
};
static const struct mfd_cell cros_ec_led_cells[] = {
{ .name = "cros-ec-led", },
};
static const struct mfd_cell cros_ec_keyboard_leds_cells[] = {
{ .name = "cros-keyboard-leds", },
};
static const struct mfd_cell cros_ec_ucsi_cells[] = {
{ .name = "cros_ec_ucsi", },
};
static const struct mfd_cell cros_ec_charge_control_cells[] = {
{ .name = "cros-charge-control", },
};
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_GPIO,
.mfd_cells = cros_ec_gpio_cells,
.num_cells = ARRAY_SIZE(cros_ec_gpio_cells),
},
{
.id = EC_FEATURE_RTC,
.mfd_cells = cros_ec_rtc_cells,
.num_cells = ARRAY_SIZE(cros_ec_rtc_cells),
},
{
.id = EC_FEATURE_HANG_DETECT,
.mfd_cells = cros_ec_wdt_cells,
.num_cells = ARRAY_SIZE(cros_ec_wdt_cells),
},
{
.id = EC_FEATURE_LED,
.mfd_cells = cros_ec_led_cells,
.num_cells = ARRAY_SIZE(cros_ec_led_cells),
},
{
.id = EC_FEATURE_PWM_KEYB,
.mfd_cells = cros_ec_keyboard_leds_cells,
.num_cells = ARRAY_SIZE(cros_ec_keyboard_leds_cells),
},
{
.id = EC_FEATURE_CHARGER,
.mfd_cells = cros_ec_charge_control_cells,
.num_cells = ARRAY_SIZE(cros_ec_charge_control_cells),
},
};
static const struct mfd_cell cros_ec_platform_cells[] = {
{ .name = "cros-ec-chardev", },
{ .name = "cros-ec-debugfs", },
{ .name = "cros-ec-hwmon", },
{ .name = "cros-ec-sysfs", },
};
static const struct mfd_cell cros_ec_pchg_cells[] = {
{ .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_obj(*ec);
struct ec_response_pchg_count pchg_count;
int i;
if (!ec)
return retval;
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);
/*
* Add the class device
*/
ec->class_dev.class = &cros_class;
ec->class_dev.parent = dev;
ec->class_dev.release = cros_ec_class_release;
retval = cros_ec_read_features(ec);
if (retval < 0)
goto failed;
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;
}
}
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;
dev_set_drvdata(dev, ec);
/* 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);
}
}
/*
* FW nodes can load cros_ec_ucsi, but early PDC devices did not define
* the required nodes. On PDC systems without FW nodes for cros_ec_ucsi,
* the driver should be added as an mfd subdevice.
*/
if (cros_ec_check_features(ec, EC_FEATURE_USB_PD) &&
cros_ec_check_features(ec, EC_FEATURE_UCSI_PPM) &&
!acpi_dev_found("GOOG0021") &&
!of_find_compatible_node(NULL, NULL, "google,cros-ec-ucsi")) {
retval = mfd_add_hotplug_devices(ec->dev,
cros_ec_ucsi_cells,
ARRAY_SIZE(cros_ec_ucsi_cells));
if (retval)
dev_warn(ec->dev, "failed to add cros_ec_ucsi: %d\n", retval);
}
/*
* UCSI provides power supply information so we don't need to separately
* load the cros_usbpd_charger driver.
*/
if (cros_ec_check_features(ec, EC_FEATURE_USB_PD) &&
!cros_ec_check_features(ec, EC_FEATURE_UCSI_PPM)) {
retval = mfd_add_hotplug_devices(ec->dev,
cros_usbpd_charger_cells,
ARRAY_SIZE(cros_usbpd_charger_cells));
if (retval)
dev_warn(ec->dev, "failed to add usbpd-charger: %d\n",
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 PCHG device cannot be detected by sending EC_FEATURE_GET_CMD, but
* it can be detected by querying the number of peripheral chargers.
*/
retval = cros_ec_cmd(ec->ec_dev, 0, EC_CMD_PCHG_COUNT, NULL, 0,
&pchg_count, sizeof(pchg_count));
if (retval >= 0 && pchg_count.port_count) {
retval = mfd_add_hotplug_devices(ec->dev,
cros_ec_pchg_cells,
ARRAY_SIZE(cros_ec_pchg_cells));
if (retval)
dev_warn(ec->dev, "failed to add pchg: %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 void 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);
}
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;
}
ret = platform_driver_register(&cros_ec_dev_driver);
if (ret) {
pr_warn(CROS_EC_DEV_NAME ": can't register driver: %d\n", ret);
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("ChromeOS Embedded Controller");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");