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platform/x86: samsung-laptop: Add support for Samsung's NP7[34]0U3E models.

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These models have only 4 levels of keyboard backlight brightness and forget
how to work the backlight after resuming from S3 sleep. I've added a quirk
to set the appropriate number of backlight levels, and one to re-enable the
keyboard backlight on resume.

(Whitespace cleaned up by Matthew Garrett)

Signed-off-by: Scott Thrasher <scott.thrasher@gmail.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
This commit is contained in:
Scott Thrasher 2014-05-06 08:06:42 -07:00 committed by Matthew Garrett
parent fe808bfb59
commit 0ca849ea4f
1 changed files with 38 additions and 0 deletions
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38
drivers/platform/x86/samsung-laptop.c
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@ -27,6 +27,7 @@
#include <linux/debugfs.h>
#include <linux/ctype.h>
#include <linux/efi.h>
#include <linux/suspend.h>
#include <acpi/video.h>
/*
@ -340,6 +341,8 @@ struct samsung_laptop {
struct samsung_laptop_debug debug;
struct samsung_quirks *quirks;
struct notifier_block pm_nb;
bool handle_backlight;
bool has_stepping_quirk;
@ -348,6 +351,8 @@ struct samsung_laptop {
struct samsung_quirks {
bool broken_acpi_video;
bool four_kbd_backlight_levels;
bool enable_kbd_backlight;
};
static struct samsung_quirks samsung_unknown = {};
@ -356,6 +361,11 @@ static struct samsung_quirks samsung_broken_acpi_video = {
.broken_acpi_video = true,
};
static struct samsung_quirks samsung_np740u3e = {
.four_kbd_backlight_levels = true,
.enable_kbd_backlight = true,
};
static bool force;
module_param(force, bool, 0);
MODULE_PARM_DESC(force,
@ -1051,6 +1061,8 @@ static int __init samsung_leds_init(struct samsung_laptop *samsung)
samsung->kbd_led.brightness_set = kbd_led_set;
samsung->kbd_led.brightness_get = kbd_led_get;
samsung->kbd_led.max_brightness = 8;
if (samsung->quirks->four_kbd_backlight_levels)
samsung->kbd_led.max_brightness = 4;
ret = led_classdev_register(&samsung->platform_device->dev,
&samsung->kbd_led);
@ -1414,6 +1426,19 @@ static void samsung_platform_exit(struct samsung_laptop *samsung)
}
}
static int samsung_pm_notification(struct notifier_block *nb,
unsigned long val, void *ptr)
{
struct samsung_laptop *samsung;
samsung = container_of(nb, struct samsung_laptop, pm_nb);
if (val == PM_POST_HIBERNATION &&
samsung->quirks->enable_kbd_backlight)
kbd_backlight_enable(samsung);
return 0;
}
static int __init samsung_platform_init(struct samsung_laptop *samsung)
{
struct platform_device *pdev;
@ -1534,6 +1559,15 @@ static struct dmi_system_id __initdata samsung_dmi_table[] = {
},
.driver_data = &samsung_broken_acpi_video,
},
{
.callback = samsung_dmi_matched,
.ident = "730U3E/740U3E",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
},
.driver_data = &samsung_np740u3e,
},
{ },
};
MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
@ -1608,6 +1642,9 @@ static int __init samsung_init(void)
if (ret)
goto error_debugfs;
samsung->pm_nb.notifier_call = samsung_pm_notification;
register_pm_notifier(&samsung->pm_nb);
samsung_platform_device = samsung->platform_device;
return ret;
@ -1633,6 +1670,7 @@ static void __exit samsung_exit(void)
struct samsung_laptop *samsung;
samsung = platform_get_drvdata(samsung_platform_device);
unregister_pm_notifier(&samsung->pm_nb);
samsung_debugfs_exit(samsung);
samsung_leds_exit(samsung);