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samsung-laptop: use a sysfs group

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Will be usefull later when we will have more platform sysfs files
like battery_life_extender or usb_charge.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Corentin Chary 2011-11-26 11:00:01 +01:00 committed by Matthew Garrett
parent f34cd9ca93
commit a66c16627c
1 changed files with 30 additions and 4 deletions
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34
drivers/platform/x86/samsung-laptop.c
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@ -555,6 +555,10 @@ static ssize_t set_performance_level(struct device *dev,
static DEVICE_ATTR(performance_level, S_IWUSR | S_IRUGO,
get_performance_level, set_performance_level);
static struct attribute *platform_attributes[] = {
&dev_attr_performance_level.attr,
NULL
};
static int find_signature(void __iomem *memcheck, const char *testStr)
{
@ -641,16 +645,38 @@ static int __init samsung_backlight_init(struct samsung_laptop *samsung)
return 0;
}
static mode_t samsung_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);
struct samsung_laptop *samsung = platform_get_drvdata(pdev);
bool ok = true;
if (attr == &dev_attr_performance_level.attr)
ok = !!samsung->config->performance_levels[0].name;
return ok ? attr->mode : 0;
}
static struct attribute_group platform_attribute_group = {
.is_visible = samsung_sysfs_is_visible,
.attrs = platform_attributes
};
static void samsung_sysfs_exit(struct samsung_laptop *samsung)
{
device_remove_file(&samsung->platform_device->dev,
&dev_attr_performance_level);
struct platform_device *device = samsung->platform_device;
sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
}
static int __init samsung_sysfs_init(struct samsung_laptop *samsung)
{
return device_create_file(&samsung->platform_device->dev,
&dev_attr_performance_level);
struct platform_device *device = samsung->platform_device;
return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
}
static void samsung_sabi_exit(struct samsung_laptop *samsung)