144 lines
3.3 KiB
C
144 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Device physical location support
|
|
*
|
|
* Author: Won Chung <wonchung@google.com>
|
|
*/
|
|
|
|
#include <linux/acpi.h>
|
|
#include <linux/sysfs.h>
|
|
|
|
#include "physical_location.h"
|
|
|
|
bool dev_add_physical_location(struct device *dev)
|
|
{
|
|
struct acpi_pld_info *pld;
|
|
acpi_status status;
|
|
|
|
if (!has_acpi_companion(dev))
|
|
return false;
|
|
|
|
status = acpi_get_physical_device_location(ACPI_HANDLE(dev), &pld);
|
|
if (ACPI_FAILURE(status))
|
|
return false;
|
|
|
|
dev->physical_location =
|
|
kzalloc(sizeof(*dev->physical_location), GFP_KERNEL);
|
|
if (!dev->physical_location)
|
|
return false;
|
|
dev->physical_location->panel = pld->panel;
|
|
dev->physical_location->vertical_position = pld->vertical_position;
|
|
dev->physical_location->horizontal_position = pld->horizontal_position;
|
|
dev->physical_location->dock = pld->dock;
|
|
dev->physical_location->lid = pld->lid;
|
|
|
|
ACPI_FREE(pld);
|
|
return true;
|
|
}
|
|
|
|
static ssize_t panel_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
const char *panel;
|
|
|
|
switch (dev->physical_location->panel) {
|
|
case DEVICE_PANEL_TOP:
|
|
panel = "top";
|
|
break;
|
|
case DEVICE_PANEL_BOTTOM:
|
|
panel = "bottom";
|
|
break;
|
|
case DEVICE_PANEL_LEFT:
|
|
panel = "left";
|
|
break;
|
|
case DEVICE_PANEL_RIGHT:
|
|
panel = "right";
|
|
break;
|
|
case DEVICE_PANEL_FRONT:
|
|
panel = "front";
|
|
break;
|
|
case DEVICE_PANEL_BACK:
|
|
panel = "back";
|
|
break;
|
|
default:
|
|
panel = "unknown";
|
|
}
|
|
return sysfs_emit(buf, "%s\n", panel);
|
|
}
|
|
static DEVICE_ATTR_RO(panel);
|
|
|
|
static ssize_t vertical_position_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
const char *vertical_position;
|
|
|
|
switch (dev->physical_location->vertical_position) {
|
|
case DEVICE_VERT_POS_UPPER:
|
|
vertical_position = "upper";
|
|
break;
|
|
case DEVICE_VERT_POS_CENTER:
|
|
vertical_position = "center";
|
|
break;
|
|
case DEVICE_VERT_POS_LOWER:
|
|
vertical_position = "lower";
|
|
break;
|
|
default:
|
|
vertical_position = "unknown";
|
|
}
|
|
return sysfs_emit(buf, "%s\n", vertical_position);
|
|
}
|
|
static DEVICE_ATTR_RO(vertical_position);
|
|
|
|
static ssize_t horizontal_position_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
const char *horizontal_position;
|
|
|
|
switch (dev->physical_location->horizontal_position) {
|
|
case DEVICE_HORI_POS_LEFT:
|
|
horizontal_position = "left";
|
|
break;
|
|
case DEVICE_HORI_POS_CENTER:
|
|
horizontal_position = "center";
|
|
break;
|
|
case DEVICE_HORI_POS_RIGHT:
|
|
horizontal_position = "right";
|
|
break;
|
|
default:
|
|
horizontal_position = "unknown";
|
|
}
|
|
return sysfs_emit(buf, "%s\n", horizontal_position);
|
|
}
|
|
static DEVICE_ATTR_RO(horizontal_position);
|
|
|
|
static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sysfs_emit(buf, "%s\n",
|
|
dev->physical_location->dock ? "yes" : "no");
|
|
}
|
|
static DEVICE_ATTR_RO(dock);
|
|
|
|
static ssize_t lid_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sysfs_emit(buf, "%s\n",
|
|
dev->physical_location->lid ? "yes" : "no");
|
|
}
|
|
static DEVICE_ATTR_RO(lid);
|
|
|
|
static struct attribute *dev_attr_physical_location[] = {
|
|
&dev_attr_panel.attr,
|
|
&dev_attr_vertical_position.attr,
|
|
&dev_attr_horizontal_position.attr,
|
|
&dev_attr_dock.attr,
|
|
&dev_attr_lid.attr,
|
|
NULL,
|
|
};
|
|
|
|
const struct attribute_group dev_attr_physical_location_group = {
|
|
.name = "physical_location",
|
|
.attrs = dev_attr_physical_location,
|
|
};
|
|
|