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platform/chrome: mfd/cros_ec_dev: Add sysfs entry to set keyboard wake lid angle

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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@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Benson Leung <bleung@chromium.org>
This commit is contained in:
Gwendal Grignou
2018-03-23 18:42:47 +01:00
committed by Benson Leung
parent b082b2e145
commit c1d1e91aff
3 changed files with 96 additions and 18 deletions
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81
drivers/platform/chrome/cros_ec_sysfs.c
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@@ -258,21 +258,102 @@ exit:
return ret;
}
/* Keyboard wake angle control */
static ssize_t kb_wake_angle_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct cros_ec_dev *ec = to_cros_ec_dev(dev);
struct ec_response_motion_sense *resp;
struct ec_params_motion_sense *param;
struct cros_ec_command *msg;
int 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 = 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 kb_wake_angle_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct cros_ec_dev *ec = to_cros_ec_dev(dev);
struct ec_params_motion_sense *param;
struct cros_ec_command *msg;
u16 angle;
int ret;
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_RW(reboot);
static DEVICE_ATTR_RO(version);
static DEVICE_ATTR_RO(flashinfo);
static DEVICE_ATTR_RW(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 = to_cros_ec_dev(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);