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platform/x86: asus-wmi: Refactor charge threshold to use the battery hooking API 

At the same time use the official naming for the knobs.

Tested on a Zenbook UX430UNR.

Signed-off-by: Kristian Klausen <kristian@klausen.dk>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Kristian Klausen 2019-09-09 19:31:28 +02:00 committed by Andy Shevchenko
parent 0c37f44845
commit 7973353e92
1 changed files with 99 additions and 49 deletions
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148
drivers/platform/x86/asus-wmi.c
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@ -26,6 +26,7 @@
#include <linux/rfkill.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/power_supply.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/debugfs.h>
@ -35,6 +36,8 @@
#include <linux/thermal.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <acpi/battery.h>
#include <acpi/video.h>
#include "asus-wmi.h"
@ -195,7 +198,8 @@ struct asus_wmi {
u8 fan_boost_mode_mask;
u8 fan_boost_mode;
int charge_threshold;
// The RSOC controls the maximum charging percentage.
bool battery_rsoc_available;
struct hotplug_slot hotplug_slot;
struct mutex hotplug_lock;
@ -369,6 +373,97 @@ static bool asus_wmi_dev_is_present(struct asus_wmi *asus, u32 dev_id)
return status == 0 && (retval & ASUS_WMI_DSTS_PRESENCE_BIT);
}
/* Battery ********************************************************************/
/* The battery maximum charging percentage */
static int charge_end_threshold;
static ssize_t charge_control_end_threshold_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int value, ret, rv;
ret = kstrtouint(buf, 10, &value);
if (ret)
return ret;
if (value < 0 || value > 100)
return -EINVAL;
ret = asus_wmi_set_devstate(ASUS_WMI_DEVID_RSOC, value, &rv);
if (ret)
return ret;
if (rv != 1)
return -EIO;
/* There isn't any method in the DSDT to read the threshold, so we
* save the threshold.
*/
charge_end_threshold = value;
return count;
}
static ssize_t charge_control_end_threshold_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%d\n", charge_end_threshold);
}
static DEVICE_ATTR_RW(charge_control_end_threshold);
static int asus_wmi_battery_add(struct power_supply *battery)
{
/* The WMI method does not provide a way to specific a battery, so we
* just assume it is the first battery.
*/
if (strcmp(battery->desc->name, "BAT0") != 0)
return -ENODEV;
if (device_create_file(&battery->dev,
&dev_attr_charge_control_end_threshold))
return -ENODEV;
/* The charge threshold is only reset when the system is power cycled,
* and we can't get the current threshold so let set it to 100% when
* a battery is added.
*/
asus_wmi_set_devstate(ASUS_WMI_DEVID_RSOC, 100, NULL);
charge_end_threshold = 100;
return 0;
}
static int asus_wmi_battery_remove(struct power_supply *battery)
{
device_remove_file(&battery->dev,
&dev_attr_charge_control_end_threshold);
return 0;
}
static struct acpi_battery_hook battery_hook = {
.add_battery = asus_wmi_battery_add,
.remove_battery = asus_wmi_battery_remove,
.name = "ASUS Battery Extension",
};
static void asus_wmi_battery_init(struct asus_wmi *asus)
{
asus->battery_rsoc_available = false;
if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_RSOC)) {
asus->battery_rsoc_available = true;
battery_hook_register(&battery_hook);
}
}
static void asus_wmi_battery_exit(struct asus_wmi *asus)
{
if (asus->battery_rsoc_available)
battery_hook_unregister(&battery_hook);
}
/* LEDs ***********************************************************************/
/*
@ -2052,45 +2147,6 @@ static ssize_t cpufv_store(struct device *dev, struct device_attribute *attr,
static DEVICE_ATTR_WO(cpufv);
static ssize_t charge_threshold_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct asus_wmi *asus = dev_get_drvdata(dev);
int value, ret, rv;
ret = kstrtouint(buf, 10, &value);
if (ret)
return ret;
if (value < 0 || value > 100)
return -EINVAL;
ret = asus_wmi_set_devstate(ASUS_WMI_DEVID_RSOC, value, &rv);
if (ret)
return ret;
if (rv != 1)
return -EIO;
/* There isn't any method in the DSDT to read the threshold, so we
* save the threshold.
*/
asus->charge_threshold = value;
return count;
}
static ssize_t charge_threshold_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct asus_wmi *asus = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", asus->charge_threshold);
}
static DEVICE_ATTR_RW(charge_threshold);
static struct attribute *platform_attributes[] = {
&dev_attr_cpufv.attr,
&dev_attr_camera.attr,
@ -2099,7 +2155,6 @@ static struct attribute *platform_attributes[] = {
&dev_attr_lid_resume.attr,
&dev_attr_als_enable.attr,
&dev_attr_fan_boost_mode.attr,
&dev_attr_charge_threshold.attr,
NULL
};
@ -2123,8 +2178,6 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj,
devid = ASUS_WMI_DEVID_ALS_ENABLE;
else if (attr == &dev_attr_fan_boost_mode.attr)
ok = asus->fan_boost_mode_available;
else if (attr == &dev_attr_charge_threshold.attr)
devid = ASUS_WMI_DEVID_RSOC;
if (devid != -1)
ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
@ -2450,13 +2503,9 @@ static int asus_wmi_add(struct platform_device *pdev)
goto fail_wmi_handler;
}
asus_wmi_battery_init(asus);
asus_wmi_debugfs_init(asus);
/* The charge threshold is only reset when the system is power cycled,
* and we can't get the current threshold so let set it to 100% on
* module load.
*/
asus_wmi_set_devstate(ASUS_WMI_DEVID_RSOC, 100, NULL);
asus->charge_threshold = 100;
return 0;
@ -2491,6 +2540,7 @@ static int asus_wmi_remove(struct platform_device *device)
asus_wmi_debugfs_exit(asus);
asus_wmi_sysfs_exit(asus->platform_device);
asus_fan_set_auto(asus);
asus_wmi_battery_exit(asus);
kfree(asus);
return 0;