From 294d31e8227c9892a89d6b3e58d17886b79ea4e6 Mon Sep 17 00:00:00 2001 From: Mattia Dongili Date: Sun, 18 Aug 2013 19:33:19 +0900 Subject: [PATCH] sony-laptop: don't change keyboard backlight settings Do not touch keyboard backlight unless explicitly passed a module parameter. In this way we won't make wrong assumptions about what are good default values since they actually are different from model to model. The only side effect is that we won't know what is the current value until set via the sysfs attributes. Signed-off-by: Mattia Dongili Signed-off-by: Linus Torvalds --- drivers/platform/x86/sony-laptop.c | 26 +++++++++----------------- 1 file changed, 9 insertions(+), 17 deletions(-) diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c index d3fd52036fd6..13ec195f0ca6 100644 --- a/drivers/platform/x86/sony-laptop.c +++ b/drivers/platform/x86/sony-laptop.c @@ -127,18 +127,17 @@ MODULE_PARM_DESC(minor, "default is -1 (automatic)"); #endif -static int kbd_backlight = 1; +static int kbd_backlight = -1; module_param(kbd_backlight, int, 0444); MODULE_PARM_DESC(kbd_backlight, "set this to 0 to disable keyboard backlight, " - "1 to enable it (default: 0)"); + "1 to enable it (default: no change from current value)"); -static int kbd_backlight_timeout; /* = 0 */ +static int kbd_backlight_timeout = -1; module_param(kbd_backlight_timeout, int, 0444); MODULE_PARM_DESC(kbd_backlight_timeout, - "set this to 0 to set the default 10 seconds timeout, " - "1 for 30 seconds, 2 for 60 seconds and 3 to disable timeout " - "(default: 0)"); + "meaningful values vary from 0 to 3 and their meaning depends " + "on the model (default: no change from current value)"); #ifdef CONFIG_PM_SLEEP static void sony_nc_kbd_backlight_resume(void); @@ -1844,6 +1843,8 @@ static int sony_nc_kbd_backlight_setup(struct platform_device *pd, if (!kbdbl_ctl) return -ENOMEM; + kbdbl_ctl->mode = kbd_backlight; + kbdbl_ctl->timeout = kbd_backlight_timeout; kbdbl_ctl->handle = handle; if (handle == 0x0137) kbdbl_ctl->base = 0x0C00; @@ -1870,8 +1871,8 @@ static int sony_nc_kbd_backlight_setup(struct platform_device *pd, if (ret) goto outmode; - __sony_nc_kbd_backlight_mode_set(kbd_backlight); - __sony_nc_kbd_backlight_timeout_set(kbd_backlight_timeout); + __sony_nc_kbd_backlight_mode_set(kbdbl_ctl->mode); + __sony_nc_kbd_backlight_timeout_set(kbdbl_ctl->timeout); return 0; @@ -1886,17 +1887,8 @@ outkzalloc: static void sony_nc_kbd_backlight_cleanup(struct platform_device *pd) { if (kbdbl_ctl) { - int result; - device_remove_file(&pd->dev, &kbdbl_ctl->mode_attr); device_remove_file(&pd->dev, &kbdbl_ctl->timeout_attr); - - /* restore the default hw behaviour */ - sony_call_snc_handle(kbdbl_ctl->handle, - kbdbl_ctl->base | 0x10000, &result); - sony_call_snc_handle(kbdbl_ctl->handle, - kbdbl_ctl->base + 0x200, &result); - kfree(kbdbl_ctl); kbdbl_ctl = NULL; } -- 2.20.1