| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20180221145033.13781-1-enric.balletbo@collabora.com>
Date: Wed, 21 Feb 2018 15:50:33 +0100
From: Enric Balletbo i Serra <enric.balletbo@...labora.com>
To: Lee Jones <lee.jones@...aro.org>,
Benson Leung <bleung@...omium.org>
Cc: linux-kernel@...r.kernel.org, kernel@...labora.com,
groeck@...omium.org, gwendal@...omium.org
Subject: [PATCH 3/3] platform/chrome: mfd/cros_ec_dev: Add sysfs entry to set keyboard wake lid angle
From: Gwendal Grignou <gwendal@...omium.org>
This adds a sysfs attribute (/sys/class/chromeos/cros_ec/kb_wake_angle)
used to set and get the keyboard wake lid angle. This attribute is
present only if 2 accelerometers are controlled by the EC.
This patch also moves the cros_ec features check before the device is
added so the features map obtained from the EC is ready on time.
Signed-off-by: Gwendal Grignou <gwendal@...omium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
---
drivers/mfd/cros_ec_dev.c | 19 ++++----
drivers/platform/chrome/cros_ec_sysfs.c | 83 +++++++++++++++++++++++++++++++++
include/linux/mfd/cros_ec.h | 1 +
3 files changed, 94 insertions(+), 9 deletions(-)
diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
index 9d4b74404f49..48eac38a7d62 100644
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -485,15 +485,6 @@ static int ec_device_probe(struct platform_device *pdev)
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);
@@ -514,6 +505,16 @@ static int ec_device_probe(struct platform_device *pdev)
/* 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);
+ goto failed;
+ }
+
+ if (cros_ec_debugfs_init(ec))
+ dev_warn(dev, "failed to create debugfs directory\n");
+
return 0;
failed:
diff --git a/drivers/platform/chrome/cros_ec_sysfs.c b/drivers/platform/chrome/cros_ec_sysfs.c
index c03621e523a3..ae50a5342d58 100644
--- a/drivers/platform/chrome/cros_ec_sysfs.c
+++ b/drivers/platform/chrome/cros_ec_sysfs.c
@@ -259,21 +259,104 @@ static ssize_t show_ec_flashinfo(struct device *dev,
return ret;
}
+/* Keyboard wake angle control */
+static ssize_t show_kb_wake_angle(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ec_response_motion_sense *resp;
+ struct ec_params_motion_sense *param;
+ struct cros_ec_command *msg;
+ int ret;
+ struct cros_ec_dev *ec = container_of(
+ dev, struct cros_ec_dev, class_dev);
+
+ msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ param = (struct ec_params_motion_sense *)msg->data;
+ msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
+ msg->version = 2;
+ param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
+ param->kb_wake_angle.data = EC_MOTION_SENSE_NO_VALUE;
+ msg->outsize = sizeof(*param);
+ msg->insize = sizeof(*resp);
+ ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
+ if (ret < 0)
+ goto exit;
+ resp = (struct ec_response_motion_sense *)msg->data;
+ ret = scnprintf(buf, PAGE_SIZE, "%d\n",
+ resp->kb_wake_angle.ret);
+exit:
+ kfree(msg);
+ return ret;
+}
+
+static ssize_t store_kb_wake_angle(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ec_params_motion_sense *param;
+ struct cros_ec_command *msg;
+ int ret;
+ struct cros_ec_dev *ec = container_of(
+ dev, struct cros_ec_dev, class_dev);
+ u16 angle;
+
+ ret = kstrtou16(buf, 0, &angle);
+ if (ret)
+ return ret;
+
+ msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ param = (struct ec_params_motion_sense *)msg->data;
+ msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
+ msg->version = 2;
+ param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
+ param->kb_wake_angle.data = angle;
+ msg->outsize = sizeof(*param);
+ msg->insize = sizeof(struct ec_response_motion_sense);
+ ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
+ kfree(msg);
+ if (ret < 0)
+ return ret;
+ return count;
+}
+
/* Module initialization */
static DEVICE_ATTR(reboot, S_IWUSR | S_IRUGO, show_ec_reboot, store_ec_reboot);
static DEVICE_ATTR(version, S_IRUGO, show_ec_version, NULL);
static DEVICE_ATTR(flashinfo, S_IRUGO, show_ec_flashinfo, NULL);
+static DEVICE_ATTR(kb_wake_angle, S_IWUSR | S_IRUGO, show_kb_wake_angle,
+ store_kb_wake_angle);
static struct attribute *__ec_attrs[] = {
+ &dev_attr_kb_wake_angle.attr,
&dev_attr_reboot.attr,
&dev_attr_version.attr,
&dev_attr_flashinfo.attr,
NULL,
};
+static umode_t cros_ec_ctrl_visible(struct kobject *kobj,
+ struct attribute *a, int n)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct cros_ec_dev *ec = container_of(dev, struct cros_ec_dev,
+ class_dev);
+
+ if (a == &dev_attr_kb_wake_angle.attr && !ec->has_kb_wake_angle)
+ return 0;
+
+ return a->mode;
+}
+
struct attribute_group cros_ec_attr_group = {
.attrs = __ec_attrs,
+ .is_visible = cros_ec_ctrl_visible,
};
EXPORT_SYMBOL(cros_ec_attr_group);
diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
index 804b3ddbf819..951c27333d46 100644
--- a/include/linux/mfd/cros_ec.h
+++ b/include/linux/mfd/cros_ec.h
@@ -191,6 +191,7 @@ struct cros_ec_dev {
struct cros_ec_device *ec_dev;
struct device *dev;
struct cros_ec_debugfs *debug_info;
+ bool has_kb_wake_angle;
u16 cmd_offset;
u32 features[2];
};
--
2.16.1
Powered by blists - more mailing lists