Will be usefull later when we will have more platform sysfs files like battery_life_extender or usb_charge.
Signed-off-by: Corentin Chary <[email protected]> Acked-by: Greg Kroah-Hartman <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
