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Commit 7973353e authored by Kristian Klausen's avatar Kristian Klausen Committed by Andy Shevchenko
Browse files

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: default avatarKristian Klausen <kristian@klausen.dk>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
parent 0c37f448

drivers/platform/x86/asus-wmi.c

+99 −49
Original line number Diff line number Diff line
@@ -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;