diff options
Diffstat (limited to 'drivers/platform/x86/asus-wmi.c')
| -rw-r--r-- | drivers/platform/x86/asus-wmi.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c index 05db6b2067b5..5b779a9443d6 100644 --- a/drivers/platform/x86/asus-wmi.c +++ b/drivers/platform/x86/asus-wmi.c @@ -39,6 +39,8 @@ #include <linux/rfkill.h> #include <linux/pci.h> #include <linux/pci_hotplug.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> #include <linux/debugfs.h> #include <linux/seq_file.h> #include <linux/platform_device.h> @@ -167,6 +169,7 @@ struct asus_wmi { struct input_dev *inputdev; struct backlight_device *backlight_device; + struct device *hwmon_device; struct platform_device *platform_device; struct led_classdev tpd_led; @@ -791,6 +794,124 @@ exit: } /* + * Hwmon device + */ +static ssize_t asus_hwmon_pwm1(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct asus_wmi *asus = dev_get_drvdata(dev); + u32 value; + int err; + + err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value); + + if (err < 0) + return err; + + value |= 0xFF; + + if (value == 1) /* Low Speed */ + value = 85; + else if (value == 2) + value = 170; + else if (value == 3) + value = 255; + else if (value != 0) { + pr_err("Unknown fan speed %#x", value); + value = -1; + } + + return sprintf(buf, "%d\n", value); +} + +static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL, 0); + +static ssize_t +show_name(struct device *dev, struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "asus\n"); +} +static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0); + +static struct attribute *hwmon_attributes[] = { + &sensor_dev_attr_pwm1.dev_attr.attr, + &sensor_dev_attr_name.dev_attr.attr, + NULL +}; + +static mode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj, + struct attribute *attr, int idx) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct platform_device *pdev = to_platform_device(dev->parent); + struct asus_wmi *asus = platform_get_drvdata(pdev); + bool ok = true; + int dev_id = -1; + u32 value = ASUS_WMI_UNSUPPORTED_METHOD; + + if (attr == &sensor_dev_attr_pwm1.dev_attr.attr) + dev_id = ASUS_WMI_DEVID_FAN_CTRL; + + if (dev_id != -1) { + int err = asus_wmi_get_devstate(asus, dev_id, &value); + + if (err < 0) + return err; + } + + if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) { + /* + * We need to find a better way, probably using sfun, + * bits or spec ... + * Currently we disable it if: + * - ASUS_WMI_UNSUPPORTED_METHOD is returned + * - reverved bits are non-zero + * - sfun and presence bit are not set + */ + if (value != ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000 + || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT))) + ok = false; + } + + return ok ? attr->mode : 0; +} + +static struct attribute_group hwmon_attribute_group = { + .is_visible = asus_hwmon_sysfs_is_visible, + .attrs = hwmon_attributes +}; + +static void asus_wmi_hwmon_exit(struct asus_wmi *asus) +{ + struct device *hwmon; + + hwmon = asus->hwmon_device; + if (!hwmon) + return; + sysfs_remove_group(&hwmon->kobj, &hwmon_attribute_group); + hwmon_device_unregister(hwmon); + asus->hwmon_device = NULL; +} + +static int asus_wmi_hwmon_init(struct asus_wmi *asus) +{ + struct device *hwmon; + int result; + + hwmon = hwmon_device_register(&asus->platform_device->dev); + if (IS_ERR(hwmon)) { + pr_err("Could not register asus hwmon device\n"); + return PTR_ERR(hwmon); + } + asus->hwmon_device = hwmon; + result = sysfs_create_group(&hwmon->kobj, &hwmon_attribute_group); + if (result) + asus_wmi_hwmon_exit(asus); + return result; +} + +/* * Backlight */ static int read_backlight_power(struct asus_wmi *asus) @@ -1331,6 +1452,10 @@ static int asus_wmi_add(struct platform_device *pdev) if (err) goto fail_input; + err = asus_wmi_hwmon_init(asus); + if (err) + goto fail_hwmon; + err = asus_wmi_led_init(asus); if (err) goto fail_leds; @@ -1369,6 +1494,8 @@ fail_backlight: fail_rfkill: asus_wmi_led_exit(asus); fail_leds: + asus_wmi_hwmon_exit(asus); +fail_hwmon: asus_wmi_input_exit(asus); fail_input: asus_wmi_platform_exit(asus); @@ -1385,6 +1512,7 @@ static int asus_wmi_remove(struct platform_device *device) wmi_remove_notify_handler(asus->driver->event_guid); asus_wmi_backlight_exit(asus); asus_wmi_input_exit(asus); + asus_wmi_hwmon_exit(asus); asus_wmi_led_exit(asus); asus_wmi_rfkill_exit(asus); asus_wmi_debugfs_exit(asus); |