// 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 <linux/string_choices.h> #include "physical_location.h" bool dev_add_physical_location(struct device *dev){	struct acpi_pld_info *pld; 	if (!has_acpi_companion(dev))		return false; 	if (!acpi_get_physical_device_location(ACPI_HANDLE(dev), &pld))		return false; 	dev->physical_location = kzalloc_obj(*dev->physical_location);	if (!dev->physical_location) {		ACPI_FREE(pld);		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",		str_yes_no(dev->physical_location->dock));}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",		str_yes_no(dev->physical_location->lid));}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,};