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@xxxxxxxxxx>
Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/platform/x86/samsung-laptop.c | 34 +++++++++++++++++++++++++++++---
1 files changed, 30 insertions(+), 4 deletions(-)
diff --git a/drivers/platform/x86/samsung-laptop.c b/drivers/platform/x86/samsung-laptop.c
index 49933d2..a21e0c3 100644
--- a/drivers/platform/x86/samsung-laptop.c
+++ b/drivers/platform/x86/samsung-laptop.c
@@ -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)
--
1.7.5.4
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