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Subject[PATCH v2 2/2] cros_ec: Move cros_ec_dev module to drivers/mfd
Date
The cros_ec_dev module is responsible for registering the MFD devices
attached to the ChromeOS EC. This patch moves this module to drivers/mfd
so calls to mfd_add_devices() are not done from outside the MFD subtree
anymore.

Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
---
drivers/mfd/Kconfig | 10 +
drivers/mfd/Makefile | 1 +
drivers/mfd/cros_ec_dev.c | 552 ++++++++++++++++++++++++++++
drivers/mfd/cros_ec_dev.h | 52 +++
drivers/platform/chrome/Kconfig | 10 -
drivers/platform/chrome/Makefile | 1 -
drivers/platform/chrome/cros_ec_debugfs.c | 3 -
drivers/platform/chrome/cros_ec_debugfs.h | 27 --
drivers/platform/chrome/cros_ec_dev.c | 553 -----------------------------
drivers/platform/chrome/cros_ec_dev.h | 52 ---
drivers/platform/chrome/cros_ec_lightbar.c | 2 -
drivers/platform/chrome/cros_ec_sysfs.c | 2 -
include/linux/mfd/cros_ec.h | 4 +
13 files changed, 619 insertions(+), 650 deletions(-)
create mode 100644 drivers/mfd/cros_ec_dev.c
create mode 100644 drivers/mfd/cros_ec_dev.h
delete mode 100644 drivers/platform/chrome/cros_ec_debugfs.h
delete mode 100644 drivers/platform/chrome/cros_ec_dev.c
delete mode 100644 drivers/platform/chrome/cros_ec_dev.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 1d20a80..538a2ae 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -222,6 +222,16 @@ config MFD_CROS_EC_SPI
response time cannot be guaranteed, we support ignoring
'pre-amble' bytes before the response actually starts.

+config MFD_CROS_EC_CHARDEV
+ tristate "Chrome OS Embedded Controller userspace device interface"
+ depends on MFD_CROS_EC
+ select CROS_EC_CTL
+ ---help---
+ This driver adds support to talk with the ChromeOS EC from userspace.
+
+ If you have a supported Chromebook, choose Y or M here.
+ The module will be called cros_ec_dev.
+
config MFD_ASIC3
bool "Compaq ASIC3"
depends on GPIOLIB && ARM
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index d9474ad..fcd8af8 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -17,6 +17,7 @@ cros_ec_core-$(CONFIG_ACPI) += cros_ec_acpi_gpe.o
obj-$(CONFIG_MFD_CROS_EC) += cros_ec_core.o
obj-$(CONFIG_MFD_CROS_EC_I2C) += cros_ec_i2c.o
obj-$(CONFIG_MFD_CROS_EC_SPI) += cros_ec_spi.o
+obj-$(CONFIG_MFD_CROS_EC_CHARDEV) += cros_ec_dev.o
obj-$(CONFIG_MFD_EXYNOS_LPASS) += exynos-lpass.o

rtsx_pci-objs := rtsx_pcr.o rts5209.o rts5229.o rtl8411.o rts5227.o rts5249.o
diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
new file mode 100644
index 0000000..e4fafdd
--- /dev/null
+++ b/drivers/mfd/cros_ec_dev.c
@@ -0,0 +1,552 @@
+/*
+ * 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/mfd/core.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm.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;
+
+ msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ msg->version = 0;
+ msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
+ msg->insize = sizeof(*resp);
+ msg->outsize = 0;
+
+ ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
+ if (ret < 0)
+ goto exit;
+
+ 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;
+ }
+
+ resp = (struct ec_response_get_version *)msg->data;
+ if (resp->current_image >= ARRAY_SIZE(current_image_name))
+ resp->current_image = 3; /* invalid */
+
+ 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]);
+
+ ret = 0;
+exit:
+ kfree(msg);
+ return ret;
+}
+
+static int cros_ec_check_features(struct cros_ec_dev *ec, int feature)
+{
+ struct cros_ec_command *msg;
+ int ret;
+
+ if (ec->features[0] == -1U && ec->features[1] == -1U) {
+ /* features bitmap not read yet */
+
+ 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));
+ }
+
+ 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 void __remove(struct device *dev)
+{
+ struct cros_ec_dev *ec = container_of(dev, struct cros_ec_dev,
+ class_dev);
+ kfree(ec);
+}
+
+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 2 extra sensors in case lid angle or FIFO are needed */
+ sensor_cells = kzalloc(sizeof(struct mfd_cell) * (sensor_num + 2),
+ GFP_KERNEL);
+ if (sensor_cells == NULL)
+ goto error;
+
+ sensor_platforms = kzalloc(sizeof(struct cros_ec_sensor_platform) *
+ (sensor_num + 1), 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) {
+ sensor_platforms[id].sensor_num = sensor_num;
+
+ sensor_cells[id].name = "cros-ec-angle";
+ sensor_cells[id].id = 0;
+ sensor_cells[id].platform_data = &sensor_platforms[id];
+ sensor_cells[id].pdata_size =
+ sizeof(struct cros_ec_sensor_platform);
+ id++;
+ }
+ 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 int ec_device_probe(struct platform_device *pdev)
+{
+ int retval = -ENOMEM;
+ 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);
+
+ 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[0] = -1U; /* Not cached yet */
+ ec->features[1] = -1U; /* Not cached yet */
+ device_initialize(&ec->class_dev);
+ cdev_init(&ec->cdev, &fops);
+
+ /*
+ * 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 = __remove;
+
+ 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 = cdev_device_add(&ec->cdev, &ec->class_dev);
+ if (retval) {
+ dev_err(dev, "cdev_device_add failed => %d\n", retval);
+ goto failed;
+ }
+
+ if (cros_ec_debugfs_init(ec))
+ dev_warn(dev, "failed to create debugfs directory\n");
+
+ /* check whether this EC is a sensor hub. */
+ if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
+ cros_ec_sensors_register(ec);
+
+ /* Take control of the lightbar from the EC. */
+ lb_manual_suspend_ctrl(ec, 1);
+
+ 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);
+
+ /* Let the EC take over the lightbar again. */
+ lb_manual_suspend_ctrl(ec, 0);
+
+ cros_ec_debugfs_remove(ec);
+
+ cdev_del(&ec->cdev);
+ 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 __maybe_unused int ec_device_suspend(struct device *dev)
+{
+ struct cros_ec_dev *ec = dev_get_drvdata(dev);
+
+ lb_suspend(ec);
+
+ return 0;
+}
+
+static __maybe_unused int ec_device_resume(struct device *dev)
+{
+ struct cros_ec_dev *ec = dev_get_drvdata(dev);
+
+ 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,
+ },
+ .probe = ec_device_probe,
+ .remove = ec_device_remove,
+};
+
+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);
+ if (ret < 0) {
+ pr_warn(CROS_EC_DEV_NAME ": can't register driver: %d\n", ret);
+ goto failed_devreg;
+ }
+ return 0;
+
+failed_devreg:
+ unregister_chrdev_region(MKDEV(ec_major, 0), CROS_MAX_DEV);
+failed_chrdevreg:
+ class_unregister(&cros_class);
+ return ret;
+}
+
+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);
+}
+
+module_init(cros_ec_dev_init);
+module_exit(cros_ec_dev_exit);
+
+MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_AUTHOR("Bill Richardson <wfrichar@chromium.org>");
+MODULE_DESCRIPTION("Userspace interface to the Chrome OS Embedded Controller");
+MODULE_VERSION("1.0");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mfd/cros_ec_dev.h b/drivers/mfd/cros_ec_dev.h
new file mode 100644
index 0000000..45e9453
--- /dev/null
+++ b/drivers/mfd/cros_ec_dev.h
@@ -0,0 +1,52 @@
+/*
+ * cros_ec_dev - expose the Chrome OS Embedded Controller to userspace
+ *
+ * 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/>.
+ */
+
+#ifndef _CROS_EC_DEV_H_
+#define _CROS_EC_DEV_H_
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+#include <linux/mfd/cros_ec.h>
+
+#define CROS_EC_DEV_VERSION "1.0.0"
+
+/*
+ * @offset: within EC_LPC_ADDR_MEMMAP region
+ * @bytes: number of bytes to read. zero means "read a string" (including '\0')
+ * (at most only EC_MEMMAP_SIZE bytes can be read)
+ * @buffer: where to store the result
+ * ioctl returns the number of bytes read, negative on error
+ */
+struct cros_ec_readmem {
+ uint32_t offset;
+ uint32_t bytes;
+ uint8_t buffer[EC_MEMMAP_SIZE];
+};
+
+#define CROS_EC_DEV_IOC 0xEC
+#define CROS_EC_DEV_IOCXCMD _IOWR(CROS_EC_DEV_IOC, 0, struct cros_ec_command)
+#define CROS_EC_DEV_IOCRDMEM _IOWR(CROS_EC_DEV_IOC, 1, struct cros_ec_readmem)
+
+/* Lightbar utilities */
+extern bool ec_has_lightbar(struct cros_ec_dev *ec);
+extern int lb_manual_suspend_ctrl(struct cros_ec_dev *ec, uint8_t enable);
+extern int lb_suspend(struct cros_ec_dev *ec);
+extern int lb_resume(struct cros_ec_dev *ec);
+
+#endif /* _CROS_EC_DEV_H_ */
diff --git a/drivers/platform/chrome/Kconfig b/drivers/platform/chrome/Kconfig
index bffc892..e728a96 100644
--- a/drivers/platform/chrome/Kconfig
+++ b/drivers/platform/chrome/Kconfig
@@ -38,16 +38,6 @@ config CHROMEOS_PSTORE
If you have a supported Chromebook, choose Y or M here.
The module will be called chromeos_pstore.

-config CROS_EC_CHARDEV
- tristate "Chrome OS Embedded Controller userspace device interface"
- depends on MFD_CROS_EC
- select CROS_EC_CTL
- ---help---
- This driver adds support to talk with the ChromeOS EC from userspace.
-
- If you have a supported Chromebook, choose Y or M here.
- The module will be called cros_ec_dev.
-
config CROS_EC_CTL
tristate

diff --git a/drivers/platform/chrome/Makefile b/drivers/platform/chrome/Makefile
index bc239ec..ff3b369 100644
--- a/drivers/platform/chrome/Makefile
+++ b/drivers/platform/chrome/Makefile
@@ -5,7 +5,6 @@ obj-$(CONFIG_CHROMEOS_PSTORE) += chromeos_pstore.o
cros_ec_ctl-objs := cros_ec_sysfs.o cros_ec_lightbar.o \
cros_ec_vbc.o cros_ec_debugfs.o
obj-$(CONFIG_CROS_EC_CTL) += cros_ec_ctl.o
-obj-$(CONFIG_CROS_EC_CHARDEV) += cros_ec_dev.o
cros_ec_lpcs-objs := cros_ec_lpc.o cros_ec_lpc_reg.o
cros_ec_lpcs-$(CONFIG_CROS_EC_LPC_MEC) += cros_ec_lpc_mec.o
obj-$(CONFIG_CROS_EC_LPC) += cros_ec_lpcs.o
diff --git a/drivers/platform/chrome/cros_ec_debugfs.c b/drivers/platform/chrome/cros_ec_debugfs.c
index d0b8ce0..98a35d3 100644
--- a/drivers/platform/chrome/cros_ec_debugfs.c
+++ b/drivers/platform/chrome/cros_ec_debugfs.c
@@ -29,9 +29,6 @@
#include <linux/slab.h>
#include <linux/wait.h>

-#include "cros_ec_dev.h"
-#include "cros_ec_debugfs.h"
-
#define LOG_SHIFT 14
#define LOG_SIZE (1 << LOG_SHIFT)
#define LOG_POLL_SEC 10
diff --git a/drivers/platform/chrome/cros_ec_debugfs.h b/drivers/platform/chrome/cros_ec_debugfs.h
deleted file mode 100644
index 1ff3a50..0000000
--- a/drivers/platform/chrome/cros_ec_debugfs.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Copyright 2015 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/>.
- */
-
-#ifndef _DRV_CROS_EC_DEBUGFS_H_
-#define _DRV_CROS_EC_DEBUGFS_H_
-
-#include "cros_ec_dev.h"
-
-/* debugfs stuff */
-int cros_ec_debugfs_init(struct cros_ec_dev *ec);
-void cros_ec_debugfs_remove(struct cros_ec_dev *ec);
-
-#endif /* _DRV_CROS_EC_DEBUGFS_H_ */
diff --git a/drivers/platform/chrome/cros_ec_dev.c b/drivers/platform/chrome/cros_ec_dev.c
deleted file mode 100644
index daf0ffd..0000000
--- a/drivers/platform/chrome/cros_ec_dev.c
+++ /dev/null
@@ -1,553 +0,0 @@
-/*
- * 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/mfd/core.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/pm.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-
-#include "cros_ec_debugfs.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;
-
- msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
- if (!msg)
- return -ENOMEM;
-
- msg->version = 0;
- msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
- msg->insize = sizeof(*resp);
- msg->outsize = 0;
-
- ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
- if (ret < 0)
- goto exit;
-
- 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;
- }
-
- resp = (struct ec_response_get_version *)msg->data;
- if (resp->current_image >= ARRAY_SIZE(current_image_name))
- resp->current_image = 3; /* invalid */
-
- 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]);
-
- ret = 0;
-exit:
- kfree(msg);
- return ret;
-}
-
-static int cros_ec_check_features(struct cros_ec_dev *ec, int feature)
-{
- struct cros_ec_command *msg;
- int ret;
-
- if (ec->features[0] == -1U && ec->features[1] == -1U) {
- /* features bitmap not read yet */
-
- 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));
- }
-
- 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 void __remove(struct device *dev)
-{
- struct cros_ec_dev *ec = container_of(dev, struct cros_ec_dev,
- class_dev);
- kfree(ec);
-}
-
-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 2 extra sensors in case lid angle or FIFO are needed */
- sensor_cells = kzalloc(sizeof(struct mfd_cell) * (sensor_num + 2),
- GFP_KERNEL);
- if (sensor_cells == NULL)
- goto error;
-
- sensor_platforms = kzalloc(sizeof(struct cros_ec_sensor_platform) *
- (sensor_num + 1), 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) {
- sensor_platforms[id].sensor_num = sensor_num;
-
- sensor_cells[id].name = "cros-ec-angle";
- sensor_cells[id].id = 0;
- sensor_cells[id].platform_data = &sensor_platforms[id];
- sensor_cells[id].pdata_size =
- sizeof(struct cros_ec_sensor_platform);
- id++;
- }
- 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 int ec_device_probe(struct platform_device *pdev)
-{
- int retval = -ENOMEM;
- 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);
-
- 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[0] = -1U; /* Not cached yet */
- ec->features[1] = -1U; /* Not cached yet */
- device_initialize(&ec->class_dev);
- cdev_init(&ec->cdev, &fops);
-
- /*
- * 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 = __remove;
-
- 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 = cdev_device_add(&ec->cdev, &ec->class_dev);
- if (retval) {
- dev_err(dev, "cdev_device_add failed => %d\n", retval);
- goto failed;
- }
-
- if (cros_ec_debugfs_init(ec))
- dev_warn(dev, "failed to create debugfs directory\n");
-
- /* check whether this EC is a sensor hub. */
- if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
- cros_ec_sensors_register(ec);
-
- /* Take control of the lightbar from the EC. */
- lb_manual_suspend_ctrl(ec, 1);
-
- 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);
-
- /* Let the EC take over the lightbar again. */
- lb_manual_suspend_ctrl(ec, 0);
-
- cros_ec_debugfs_remove(ec);
-
- cdev_del(&ec->cdev);
- 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 __maybe_unused int ec_device_suspend(struct device *dev)
-{
- struct cros_ec_dev *ec = dev_get_drvdata(dev);
-
- lb_suspend(ec);
-
- return 0;
-}
-
-static __maybe_unused int ec_device_resume(struct device *dev)
-{
- struct cros_ec_dev *ec = dev_get_drvdata(dev);
-
- 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,
- },
- .probe = ec_device_probe,
- .remove = ec_device_remove,
-};
-
-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);
- if (ret < 0) {
- pr_warn(CROS_EC_DEV_NAME ": can't register driver: %d\n", ret);
- goto failed_devreg;
- }
- return 0;
-
-failed_devreg:
- unregister_chrdev_region(MKDEV(ec_major, 0), CROS_MAX_DEV);
-failed_chrdevreg:
- class_unregister(&cros_class);
- return ret;
-}
-
-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);
-}
-
-module_init(cros_ec_dev_init);
-module_exit(cros_ec_dev_exit);
-
-MODULE_ALIAS("platform:" DRV_NAME);
-MODULE_AUTHOR("Bill Richardson <wfrichar@chromium.org>");
-MODULE_DESCRIPTION("Userspace interface to the Chrome OS Embedded Controller");
-MODULE_VERSION("1.0");
-MODULE_LICENSE("GPL");
diff --git a/drivers/platform/chrome/cros_ec_dev.h b/drivers/platform/chrome/cros_ec_dev.h
deleted file mode 100644
index 45e9453..0000000
--- a/drivers/platform/chrome/cros_ec_dev.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * cros_ec_dev - expose the Chrome OS Embedded Controller to userspace
- *
- * 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/>.
- */
-
-#ifndef _CROS_EC_DEV_H_
-#define _CROS_EC_DEV_H_
-
-#include <linux/ioctl.h>
-#include <linux/types.h>
-#include <linux/mfd/cros_ec.h>
-
-#define CROS_EC_DEV_VERSION "1.0.0"
-
-/*
- * @offset: within EC_LPC_ADDR_MEMMAP region
- * @bytes: number of bytes to read. zero means "read a string" (including '\0')
- * (at most only EC_MEMMAP_SIZE bytes can be read)
- * @buffer: where to store the result
- * ioctl returns the number of bytes read, negative on error
- */
-struct cros_ec_readmem {
- uint32_t offset;
- uint32_t bytes;
- uint8_t buffer[EC_MEMMAP_SIZE];
-};
-
-#define CROS_EC_DEV_IOC 0xEC
-#define CROS_EC_DEV_IOCXCMD _IOWR(CROS_EC_DEV_IOC, 0, struct cros_ec_command)
-#define CROS_EC_DEV_IOCRDMEM _IOWR(CROS_EC_DEV_IOC, 1, struct cros_ec_readmem)
-
-/* Lightbar utilities */
-extern bool ec_has_lightbar(struct cros_ec_dev *ec);
-extern int lb_manual_suspend_ctrl(struct cros_ec_dev *ec, uint8_t enable);
-extern int lb_suspend(struct cros_ec_dev *ec);
-extern int lb_resume(struct cros_ec_dev *ec);
-
-#endif /* _CROS_EC_DEV_H_ */
diff --git a/drivers/platform/chrome/cros_ec_lightbar.c b/drivers/platform/chrome/cros_ec_lightbar.c
index 925d91c..6ea79d4 100644
--- a/drivers/platform/chrome/cros_ec_lightbar.c
+++ b/drivers/platform/chrome/cros_ec_lightbar.c
@@ -33,8 +33,6 @@
#include <linux/uaccess.h>
#include <linux/slab.h>

-#include "cros_ec_dev.h"
-
/* Rate-limit the lightbar interface to prevent DoS. */
static unsigned long lb_interval_jiffies = 50 * HZ / 1000;

diff --git a/drivers/platform/chrome/cros_ec_sysfs.c b/drivers/platform/chrome/cros_ec_sysfs.c
index 201f11a..d6eebe8 100644
--- a/drivers/platform/chrome/cros_ec_sysfs.c
+++ b/drivers/platform/chrome/cros_ec_sysfs.c
@@ -34,8 +34,6 @@
#include <linux/types.h>
#include <linux/uaccess.h>

-#include "cros_ec_dev.h"
-
/* Accessor functions */

static ssize_t show_ec_reboot(struct device *dev,
diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
index 4e887ba..c615359 100644
--- a/include/linux/mfd/cros_ec.h
+++ b/include/linux/mfd/cros_ec.h
@@ -322,6 +322,10 @@ extern struct attribute_group cros_ec_attr_group;
extern struct attribute_group cros_ec_lightbar_attr_group;
extern struct attribute_group cros_ec_vbc_attr_group;

+/* debugfs stuff */
+int cros_ec_debugfs_init(struct cros_ec_dev *ec);
+void cros_ec_debugfs_remove(struct cros_ec_dev *ec);
+
/* ACPI GPE handler */
#ifdef CONFIG_ACPI

--
2.7.4
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