diff options
| -rw-r--r-- | drivers/platform/x86/eeepc-wmi.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/platform/x86/eeepc-wmi.c b/drivers/platform/x86/eeepc-wmi.c index 21df266..462ceab 100644 --- a/drivers/platform/x86/eeepc-wmi.c +++ b/drivers/platform/x86/eeepc-wmi.c @@ -57,6 +57,7 @@ MODULE_ALIAS("wmi:"EEEPC_WMI_MGMT_GUID); #define EEEPC_WMI_METHODID_DEVS 0x53564544 #define EEEPC_WMI_METHODID_DSTS 0x53544344 +#define EEEPC_WMI_METHODID_CFVS 0x53564643 #define EEEPC_WMI_DEVID_BACKLIGHT 0x00050012 @@ -297,6 +298,49 @@ static void eeepc_wmi_notify(u32 value, void *context) kfree(obj); } +static int store_cpufv(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + int value; + struct acpi_buffer input = { (acpi_size)sizeof(value), &value }; + acpi_status status; + + if (!count || sscanf(buf, "%i", &value) != 1) + return -EINVAL; + if (value < 0 || value > 2) + return -EINVAL; + + status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, + 1, EEEPC_WMI_METHODID_CFVS, &input, NULL); + + if (ACPI_FAILURE(status)) + return -EIO; + else + return count; +} + +static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv); + +static void eeepc_wmi_sysfs_exit(struct platform_device *device) +{ + device_remove_file(&device->dev, &dev_attr_cpufv); +} + +static int eeepc_wmi_sysfs_init(struct platform_device *device) +{ + int retval = -ENOMEM; + + retval = device_create_file(&device->dev, &dev_attr_cpufv); + if (retval) + goto error_sysfs; + + return 0; + +error_sysfs: + eeepc_wmi_sysfs_exit(platform_device); + return retval; +} + static int __devinit eeepc_wmi_platform_probe(struct platform_device *device) { struct eeepc_wmi *eeepc; @@ -392,8 +436,14 @@ static int __init eeepc_wmi_init(void) goto del_dev; } + err = eeepc_wmi_sysfs_init(platform_device); + if (err) + goto del_sysfs; + return 0; +del_sysfs: + eeepc_wmi_sysfs_exit(platform_device); del_dev: platform_device_del(platform_device); put_dev: @@ -408,6 +458,7 @@ static void __exit eeepc_wmi_exit(void) { struct eeepc_wmi *eeepc; + eeepc_wmi_sysfs_exit(platform_device); eeepc = platform_get_drvdata(platform_device); platform_driver_unregister(&platform_driver); platform_device_unregister(platform_device); |
