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synced 2024-09-04 18:09:57 +00:00
asus-wmi: add hwmon interface and pwm1
Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
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commit
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2 changed files with 129 additions and 0 deletions
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@ -458,6 +458,7 @@ config ASUS_WMI
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tristate "ASUS WMI Driver (EXPERIMENTAL)"
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depends on ACPI_WMI
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depends on INPUT
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depends on HWMON
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depends on EXPERIMENTAL
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depends on BACKLIGHT_CLASS_DEVICE
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depends on RFKILL || RFKILL = n
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@ -39,6 +39,8 @@
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#include <linux/rfkill.h>
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#include <linux/pci.h>
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#include <linux/pci_hotplug.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/platform_device.h>
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@ -167,6 +169,7 @@ struct asus_wmi {
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struct input_dev *inputdev;
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struct backlight_device *backlight_device;
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struct device *hwmon_device;
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struct platform_device *platform_device;
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struct led_classdev tpd_led;
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@ -790,6 +793,124 @@ static int asus_wmi_rfkill_init(struct asus_wmi *asus)
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return result;
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}
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/*
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* Hwmon device
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*/
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static ssize_t asus_hwmon_pwm1(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct asus_wmi *asus = dev_get_drvdata(dev);
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u32 value;
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int err;
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err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
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if (err < 0)
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return err;
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value |= 0xFF;
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if (value == 1) /* Low Speed */
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value = 85;
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else if (value == 2)
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value = 170;
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else if (value == 3)
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value = 255;
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else if (value != 0) {
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pr_err("Unknown fan speed %#x", value);
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value = -1;
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}
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return sprintf(buf, "%d\n", value);
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}
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static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL, 0);
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static ssize_t
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show_name(struct device *dev, struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "asus\n");
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}
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static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
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static struct attribute *hwmon_attributes[] = {
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&sensor_dev_attr_pwm1.dev_attr.attr,
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&sensor_dev_attr_name.dev_attr.attr,
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NULL
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};
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static mode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
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struct attribute *attr, int idx)
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{
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struct device *dev = container_of(kobj, struct device, kobj);
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struct platform_device *pdev = to_platform_device(dev->parent);
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struct asus_wmi *asus = platform_get_drvdata(pdev);
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bool ok = true;
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int dev_id = -1;
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u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
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if (attr == &sensor_dev_attr_pwm1.dev_attr.attr)
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dev_id = ASUS_WMI_DEVID_FAN_CTRL;
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if (dev_id != -1) {
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int err = asus_wmi_get_devstate(asus, dev_id, &value);
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if (err < 0)
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return err;
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}
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if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
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/*
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* We need to find a better way, probably using sfun,
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* bits or spec ...
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* Currently we disable it if:
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* - ASUS_WMI_UNSUPPORTED_METHOD is returned
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* - reverved bits are non-zero
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* - sfun and presence bit are not set
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*/
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if (value != ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
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|| (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
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ok = false;
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}
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return ok ? attr->mode : 0;
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}
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static struct attribute_group hwmon_attribute_group = {
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.is_visible = asus_hwmon_sysfs_is_visible,
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.attrs = hwmon_attributes
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};
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static void asus_wmi_hwmon_exit(struct asus_wmi *asus)
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{
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struct device *hwmon;
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hwmon = asus->hwmon_device;
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if (!hwmon)
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return;
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sysfs_remove_group(&hwmon->kobj, &hwmon_attribute_group);
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hwmon_device_unregister(hwmon);
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asus->hwmon_device = NULL;
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}
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static int asus_wmi_hwmon_init(struct asus_wmi *asus)
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{
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struct device *hwmon;
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int result;
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hwmon = hwmon_device_register(&asus->platform_device->dev);
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if (IS_ERR(hwmon)) {
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pr_err("Could not register asus hwmon device\n");
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return PTR_ERR(hwmon);
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}
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asus->hwmon_device = hwmon;
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result = sysfs_create_group(&hwmon->kobj, &hwmon_attribute_group);
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if (result)
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asus_wmi_hwmon_exit(asus);
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return result;
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}
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/*
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* Backlight
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*/
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@ -1331,6 +1452,10 @@ static int asus_wmi_add(struct platform_device *pdev)
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if (err)
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goto fail_input;
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err = asus_wmi_hwmon_init(asus);
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if (err)
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goto fail_hwmon;
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err = asus_wmi_led_init(asus);
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if (err)
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goto fail_leds;
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@ -1369,6 +1494,8 @@ static int asus_wmi_add(struct platform_device *pdev)
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fail_rfkill:
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asus_wmi_led_exit(asus);
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fail_leds:
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asus_wmi_hwmon_exit(asus);
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fail_hwmon:
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asus_wmi_input_exit(asus);
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fail_input:
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asus_wmi_platform_exit(asus);
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@ -1385,6 +1512,7 @@ static int asus_wmi_remove(struct platform_device *device)
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wmi_remove_notify_handler(asus->driver->event_guid);
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asus_wmi_backlight_exit(asus);
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asus_wmi_input_exit(asus);
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asus_wmi_hwmon_exit(asus);
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asus_wmi_led_exit(asus);
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asus_wmi_rfkill_exit(asus);
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asus_wmi_debugfs_exit(asus);
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