From 2f7c68cb55ecb7331f2381deb497c27155f32faf Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 03 Jan 2024 09:43:39 +0000
Subject: [PATCH] update kernel to 5.10.198
---
kernel/drivers/mfd/cros_ec_dev.c | 647 ++++++++++++++++------------------------------------------
1 files changed, 176 insertions(+), 471 deletions(-)
diff --git a/kernel/drivers/mfd/cros_ec_dev.c b/kernel/drivers/mfd/cros_ec_dev.c
index bccde3e..d07b43d 100644
--- a/kernel/drivers/mfd/cros_ec_dev.c
+++ b/kernel/drivers/mfd/cros_ec_dev.c
@@ -1,266 +1,123 @@
+// 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.
- *
- * 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, see <http://www.gnu.org/licenses/>.
*/
-#include <linux/fs.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/pm.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>
-#include <linux/uaccess.h>
-
-#include "cros_ec_dev.h"
#define DRV_NAME "cros-ec-dev"
-
-/* Device variables */
-#define CROS_MAX_DEV 128
-static int ec_major;
-
-static const struct attribute_group *cros_ec_groups[] = {
- &cros_ec_attr_group,
- &cros_ec_lightbar_attr_group,
- &cros_ec_vbc_attr_group,
- NULL,
-};
static struct class cros_class = {
.owner = THIS_MODULE,
.name = "chromeos",
- .dev_groups = cros_ec_groups,
};
-/* Basic communication */
-static int ec_get_version(struct cros_ec_dev *ec, char *str, int maxlen)
-{
- struct ec_response_get_version *resp;
- static const char * const current_image_name[] = {
- "unknown", "read-only", "read-write", "invalid",
- };
- struct cros_ec_command *msg;
- int ret;
+/**
+ * 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;
+};
- msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
- if (!msg)
- return -ENOMEM;
+/**
+ * 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;
+};
- msg->version = 0;
- msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
- msg->insize = sizeof(*resp);
- msg->outsize = 0;
+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",
+ },
+};
- ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
- if (ret < 0)
- goto exit;
+static const struct mfd_cell cros_ec_cec_cells[] = {
+ { .name = "cros-ec-cec", },
+};
- if (msg->result != EC_RES_SUCCESS) {
- snprintf(str, maxlen,
- "%s\nUnknown EC version: EC returned %d\n",
- CROS_EC_DEV_VERSION, msg->result);
- ret = -EINVAL;
- goto exit;
- }
+static const struct mfd_cell cros_ec_rtc_cells[] = {
+ { .name = "cros-ec-rtc", },
+};
- resp = (struct ec_response_get_version *)msg->data;
- if (resp->current_image >= ARRAY_SIZE(current_image_name))
- resp->current_image = 3; /* invalid */
+static const struct mfd_cell cros_ec_sensorhub_cells[] = {
+ { .name = "cros-ec-sensorhub", },
+};
- snprintf(str, maxlen, "%s\n%s\n%s\n%s\n", CROS_EC_DEV_VERSION,
- resp->version_string_ro, resp->version_string_rw,
- current_image_name[resp->current_image]);
+static const struct mfd_cell cros_usbpd_charger_cells[] = {
+ { .name = "cros-usbpd-charger", },
+ { .name = "cros-usbpd-logger", },
+};
- ret = 0;
-exit:
- kfree(msg);
- return ret;
-}
+static const struct mfd_cell cros_usbpd_notify_cells[] = {
+ { .name = "cros-usbpd-notify", },
+};
-static int cros_ec_check_features(struct cros_ec_dev *ec, int feature)
-{
- struct cros_ec_command *msg;
- int ret;
+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),
+ },
+};
- if (ec->features[0] == -1U && ec->features[1] == -1U) {
- /* features bitmap not read yet */
+static const struct mfd_cell cros_ec_platform_cells[] = {
+ { .name = "cros-ec-chardev", },
+ { .name = "cros-ec-debugfs", },
+ { .name = "cros-ec-lightbar", },
+ { .name = "cros-ec-sysfs", },
+};
- msg = kmalloc(sizeof(*msg) + sizeof(ec->features), GFP_KERNEL);
- if (!msg)
- return -ENOMEM;
-
- msg->version = 0;
- msg->command = EC_CMD_GET_FEATURES + ec->cmd_offset;
- msg->insize = sizeof(ec->features);
- msg->outsize = 0;
-
- ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
- if (ret < 0 || msg->result != EC_RES_SUCCESS) {
- dev_warn(ec->dev, "cannot get EC features: %d/%d\n",
- ret, msg->result);
- memset(ec->features, 0, sizeof(ec->features));
- } else {
- memcpy(ec->features, msg->data, sizeof(ec->features));
- }
-
- dev_dbg(ec->dev, "EC features %08x %08x\n",
- ec->features[0], ec->features[1]);
-
- kfree(msg);
- }
-
- return ec->features[feature / 32] & EC_FEATURE_MASK_0(feature);
-}
-
-/* Device file ops */
-static int ec_device_open(struct inode *inode, struct file *filp)
-{
- struct cros_ec_dev *ec = container_of(inode->i_cdev,
- struct cros_ec_dev, cdev);
- filp->private_data = ec;
- nonseekable_open(inode, filp);
- return 0;
-}
-
-static int ec_device_release(struct inode *inode, struct file *filp)
-{
- return 0;
-}
-
-static ssize_t ec_device_read(struct file *filp, char __user *buffer,
- size_t length, loff_t *offset)
-{
- struct cros_ec_dev *ec = filp->private_data;
- char msg[sizeof(struct ec_response_get_version) +
- sizeof(CROS_EC_DEV_VERSION)];
- size_t count;
- int ret;
-
- if (*offset != 0)
- return 0;
-
- ret = ec_get_version(ec, msg, sizeof(msg));
- if (ret)
- return ret;
-
- count = min(length, strlen(msg));
-
- if (copy_to_user(buffer, msg, count))
- return -EFAULT;
-
- *offset = count;
- return count;
-}
-
-/* Ioctls */
-static long ec_device_ioctl_xcmd(struct cros_ec_dev *ec, void __user *arg)
-{
- long ret;
- struct cros_ec_command u_cmd;
- struct cros_ec_command *s_cmd;
-
- if (copy_from_user(&u_cmd, arg, sizeof(u_cmd)))
- return -EFAULT;
-
- if ((u_cmd.outsize > EC_MAX_MSG_BYTES) ||
- (u_cmd.insize > EC_MAX_MSG_BYTES))
- return -EINVAL;
-
- s_cmd = kmalloc(sizeof(*s_cmd) + max(u_cmd.outsize, u_cmd.insize),
- GFP_KERNEL);
- if (!s_cmd)
- return -ENOMEM;
-
- if (copy_from_user(s_cmd, arg, sizeof(*s_cmd) + u_cmd.outsize)) {
- ret = -EFAULT;
- goto exit;
- }
-
- if (u_cmd.outsize != s_cmd->outsize ||
- u_cmd.insize != s_cmd->insize) {
- ret = -EINVAL;
- goto exit;
- }
-
- s_cmd->command += ec->cmd_offset;
- ret = cros_ec_cmd_xfer(ec->ec_dev, s_cmd);
- /* Only copy data to userland if data was received. */
- if (ret < 0)
- goto exit;
-
- if (copy_to_user(arg, s_cmd, sizeof(*s_cmd) + s_cmd->insize))
- ret = -EFAULT;
-exit:
- kfree(s_cmd);
- return ret;
-}
-
-static long ec_device_ioctl_readmem(struct cros_ec_dev *ec, void __user *arg)
-{
- struct cros_ec_device *ec_dev = ec->ec_dev;
- struct cros_ec_readmem s_mem = { };
- long num;
-
- /* Not every platform supports direct reads */
- if (!ec_dev->cmd_readmem)
- return -ENOTTY;
-
- if (copy_from_user(&s_mem, arg, sizeof(s_mem)))
- return -EFAULT;
-
- num = ec_dev->cmd_readmem(ec_dev, s_mem.offset, s_mem.bytes,
- s_mem.buffer);
- if (num <= 0)
- return num;
-
- if (copy_to_user((void __user *)arg, &s_mem, sizeof(s_mem)))
- return -EFAULT;
-
- return 0;
-}
-
-static long ec_device_ioctl(struct file *filp, unsigned int cmd,
- unsigned long arg)
-{
- struct cros_ec_dev *ec = filp->private_data;
-
- if (_IOC_TYPE(cmd) != CROS_EC_DEV_IOC)
- return -ENOTTY;
-
- switch (cmd) {
- case CROS_EC_DEV_IOCXCMD:
- return ec_device_ioctl_xcmd(ec, (void __user *)arg);
- case CROS_EC_DEV_IOCRDMEM:
- return ec_device_ioctl_readmem(ec, (void __user *)arg);
- }
-
- return -ENOTTY;
-}
-
-/* Module initialization */
-static const struct file_operations fops = {
- .open = ec_device_open,
- .release = ec_device_release,
- .read = ec_device_read,
- .unlocked_ioctl = ec_device_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = ec_device_ioctl,
-#endif
+static const struct mfd_cell cros_ec_vbc_cells[] = {
+ { .name = "cros-ec-vbc", }
};
static void cros_ec_class_release(struct device *dev)
@@ -268,139 +125,14 @@
kfree(to_cros_ec_dev(dev));
}
-static void cros_ec_sensors_register(struct cros_ec_dev *ec)
-{
- /*
- * Issue a command to get the number of sensor reported.
- * Build an array of sensors driver and register them all.
- */
- int ret, i, id, sensor_num;
- struct mfd_cell *sensor_cells;
- struct cros_ec_sensor_platform *sensor_platforms;
- int sensor_type[MOTIONSENSE_TYPE_MAX];
- struct ec_params_motion_sense *params;
- struct ec_response_motion_sense *resp;
- struct cros_ec_command *msg;
-
- msg = kzalloc(sizeof(struct cros_ec_command) +
- max(sizeof(*params), sizeof(*resp)), GFP_KERNEL);
- if (msg == NULL)
- return;
-
- msg->version = 2;
- msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
- msg->outsize = sizeof(*params);
- msg->insize = sizeof(*resp);
-
- params = (struct ec_params_motion_sense *)msg->data;
- params->cmd = MOTIONSENSE_CMD_DUMP;
-
- ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
- if (ret < 0 || msg->result != EC_RES_SUCCESS) {
- dev_warn(ec->dev, "cannot get EC sensor information: %d/%d\n",
- ret, msg->result);
- goto error;
- }
-
- resp = (struct ec_response_motion_sense *)msg->data;
- sensor_num = resp->dump.sensor_count;
- /* Allocate 1 extra sensors in FIFO are needed */
- sensor_cells = kcalloc(sensor_num + 1, sizeof(struct mfd_cell),
- GFP_KERNEL);
- if (sensor_cells == NULL)
- goto error;
-
- sensor_platforms = kcalloc(sensor_num + 1,
- sizeof(struct cros_ec_sensor_platform),
- GFP_KERNEL);
- if (sensor_platforms == NULL)
- goto error_platforms;
-
- memset(sensor_type, 0, sizeof(sensor_type));
- id = 0;
- for (i = 0; i < sensor_num; i++) {
- params->cmd = MOTIONSENSE_CMD_INFO;
- params->info.sensor_num = i;
- ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
- if (ret < 0 || msg->result != EC_RES_SUCCESS) {
- dev_warn(ec->dev, "no info for EC sensor %d : %d/%d\n",
- i, ret, msg->result);
- continue;
- }
- switch (resp->info.type) {
- case MOTIONSENSE_TYPE_ACCEL:
- sensor_cells[id].name = "cros-ec-accel";
- break;
- case MOTIONSENSE_TYPE_BARO:
- sensor_cells[id].name = "cros-ec-baro";
- break;
- case MOTIONSENSE_TYPE_GYRO:
- sensor_cells[id].name = "cros-ec-gyro";
- break;
- case MOTIONSENSE_TYPE_MAG:
- sensor_cells[id].name = "cros-ec-mag";
- break;
- case MOTIONSENSE_TYPE_PROX:
- sensor_cells[id].name = "cros-ec-prox";
- break;
- case MOTIONSENSE_TYPE_LIGHT:
- sensor_cells[id].name = "cros-ec-light";
- break;
- case MOTIONSENSE_TYPE_ACTIVITY:
- sensor_cells[id].name = "cros-ec-activity";
- break;
- default:
- dev_warn(ec->dev, "unknown type %d\n", resp->info.type);
- continue;
- }
- sensor_platforms[id].sensor_num = i;
- sensor_cells[id].id = sensor_type[resp->info.type];
- sensor_cells[id].platform_data = &sensor_platforms[id];
- sensor_cells[id].pdata_size =
- sizeof(struct cros_ec_sensor_platform);
-
- sensor_type[resp->info.type]++;
- id++;
- }
-
- if (sensor_type[MOTIONSENSE_TYPE_ACCEL] >= 2)
- ec->has_kb_wake_angle = true;
-
- if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO)) {
- sensor_cells[id].name = "cros-ec-ring";
- id++;
- }
-
- ret = mfd_add_devices(ec->dev, 0, sensor_cells, id,
- NULL, 0, NULL);
- if (ret)
- dev_err(ec->dev, "failed to add EC sensors\n");
-
- kfree(sensor_platforms);
-error_platforms:
- kfree(sensor_cells);
-error:
- kfree(msg);
-}
-
-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_usbpd_charger_cells[] = {
- { .name = "cros-usbpd-charger" }
-};
-
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;
@@ -412,14 +144,27 @@
ec->features[0] = -1U; /* Not cached yet */
ec->features[1] = -1U; /* Not cached yet */
device_initialize(&ec->class_dev);
- cdev_init(&ec->cdev, &fops);
+
+ 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
- * Link to the character device for creating the /dev entry
- * in devtmpfs.
*/
- ec->class_dev.devt = MKDEV(ec_major, pdev->id);
ec->class_dev.class = &cros_class;
ec->class_dev.parent = dev;
ec->class_dev.release = cros_ec_class_release;
@@ -430,58 +175,74 @@
goto failed;
}
- /* check whether this EC is a sensor hub. */
- if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
- cros_ec_sensors_register(ec);
-
- /* Check whether this EC instance has CEC host command support */
- if (cros_ec_check_features(ec, EC_FEATURE_CEC)) {
- retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
- cros_ec_cec_cells,
- ARRAY_SIZE(cros_ec_cec_cells),
- NULL, 0, NULL);
- if (retval)
- dev_err(ec->dev,
- "failed to add cros-ec-cec device: %d\n",
- retval);
- }
-
- /* Check whether this EC instance has RTC host command support */
- if (cros_ec_check_features(ec, EC_FEATURE_RTC)) {
- retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
- cros_ec_rtc_cells,
- ARRAY_SIZE(cros_ec_rtc_cells),
- NULL, 0, NULL);
- if (retval)
- dev_err(ec->dev,
- "failed to add cros-ec-rtc device: %d\n",
- retval);
- }
-
- /* Check whether this EC instance has the PD charge manager */
- if (cros_ec_check_features(ec, EC_FEATURE_USB_PD)) {
- retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
- cros_usbpd_charger_cells,
- ARRAY_SIZE(cros_usbpd_charger_cells),
- NULL, 0, NULL);
- if (retval)
- dev_err(ec->dev,
- "failed to add cros-usbpd-charger device: %d\n",
- retval);
- }
-
- /* Take control of the lightbar from the EC. */
- lb_manual_suspend_ctrl(ec, 1);
-
- /* We can now add the sysfs class, we know which parameter to show */
- retval = cdev_device_add(&ec->cdev, &ec->class_dev);
- if (retval) {
- dev_err(dev, "cdev_device_add failed => %d\n", retval);
+ 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);
}
- if (cros_ec_debugfs_init(ec))
- dev_warn(dev, "failed to create debugfs directory\n");
+ /*
+ * 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);
+ }
+ }
+
+ /*
+ * 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;
@@ -494,23 +255,9 @@
{
struct cros_ec_dev *ec = dev_get_drvdata(&pdev->dev);
- /* Let the EC take over the lightbar again. */
- lb_manual_suspend_ctrl(ec, 0);
-
- cros_ec_debugfs_remove(ec);
-
mfd_remove_devices(ec->dev);
- cdev_del(&ec->cdev);
device_unregister(&ec->class_dev);
return 0;
-}
-
-static void ec_device_shutdown(struct platform_device *pdev)
-{
- struct cros_ec_dev *ec = dev_get_drvdata(&pdev->dev);
-
- /* Be sure to clear up debugfs delayed works */
- cros_ec_debugfs_remove(ec);
}
static const struct platform_device_id cros_ec_id[] = {
@@ -519,63 +266,24 @@
};
MODULE_DEVICE_TABLE(platform, cros_ec_id);
-static __maybe_unused int ec_device_suspend(struct device *dev)
-{
- struct cros_ec_dev *ec = dev_get_drvdata(dev);
-
- cros_ec_debugfs_suspend(ec);
-
- lb_suspend(ec);
-
- return 0;
-}
-
-static __maybe_unused int ec_device_resume(struct device *dev)
-{
- struct cros_ec_dev *ec = dev_get_drvdata(dev);
-
- cros_ec_debugfs_resume(ec);
-
- lb_resume(ec);
-
- return 0;
-}
-
-static const struct dev_pm_ops cros_ec_dev_pm_ops = {
-#ifdef CONFIG_PM_SLEEP
- .suspend = ec_device_suspend,
- .resume = ec_device_resume,
-#endif
-};
-
static struct platform_driver cros_ec_dev_driver = {
.driver = {
.name = DRV_NAME,
- .pm = &cros_ec_dev_pm_ops,
},
+ .id_table = cros_ec_id,
.probe = ec_device_probe,
.remove = ec_device_remove,
- .shutdown = ec_device_shutdown,
};
static int __init cros_ec_dev_init(void)
{
int ret;
- dev_t dev = 0;
ret = class_register(&cros_class);
if (ret) {
pr_err(CROS_EC_DEV_NAME ": failed to register device class\n");
return ret;
}
-
- /* Get a range of minor numbers (starting with 0) to work with */
- ret = alloc_chrdev_region(&dev, 0, CROS_MAX_DEV, CROS_EC_DEV_NAME);
- if (ret < 0) {
- pr_err(CROS_EC_DEV_NAME ": alloc_chrdev_region() failed\n");
- goto failed_chrdevreg;
- }
- ec_major = MAJOR(dev);
/* Register the driver */
ret = platform_driver_register(&cros_ec_dev_driver);
@@ -586,8 +294,6 @@
return 0;
failed_devreg:
- unregister_chrdev_region(MKDEV(ec_major, 0), CROS_MAX_DEV);
-failed_chrdevreg:
class_unregister(&cros_class);
return ret;
}
@@ -595,7 +301,6 @@
static void __exit cros_ec_dev_exit(void)
{
platform_driver_unregister(&cros_ec_dev_driver);
- unregister_chrdev(ec_major, CROS_EC_DEV_NAME);
class_unregister(&cros_class);
}
--
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