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authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>2007-10-30 17:46:20 -0200
committerLen Brown <len.brown@intel.com>2007-11-05 13:07:11 -0500
commita3f104c02ab842574e699186cf953551aafe2ca9 (patch)
tree8cee0bbd37ac14b8a9bb9a88e594a65b424e8ff9 /drivers/misc/thinkpad_acpi.h
parente927c08da53e5c87ca07f7a828d4a0048e7bacf0 (diff)
ACPI: thinkpad-acpi: support 16 levels of brightness (v3)
Lenovo ThinkPads often have 16 brightness levels in EC, and not just eight levels like older ThinkPads. They also have standard ACPI backlight brightness control. We detect the number of brightness levels by the presence of a BCLL package with 16 entries. If BCLL is not there, we assume eight levels (Z6*). If it is there, but it doesn't have 16 entries, we assume eight levels (T60). Otherwise we assume sixteen levels (T61, X61, etc). We don't use _BCL because it can have side-effects in thinkpads. Thanks to Thomas Renninger <trenn@suse.de> for notifying me of this potential problem. Using the standard ACPI backlight brightness control *instead* of the native thinkpad backlight control is a better idea, though. A different patch will take care of this. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: Thomas Renninger <trenn@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/misc/thinkpad_acpi.h')
-rw-r--r--drivers/misc/thinkpad_acpi.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index 3abcc812063..8ca19c33372 100644
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -84,7 +84,7 @@
/* ThinkPad CMOS NVRAM constants */
#define TP_NVRAM_ADDR_BRIGHTNESS 0x5e
-#define TP_NVRAM_MASK_LEVEL_BRIGHTNESS 0x07
+#define TP_NVRAM_MASK_LEVEL_BRIGHTNESS 0x0f
#define TP_NVRAM_POS_LEVEL_BRIGHTNESS 0
#define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
@@ -246,6 +246,7 @@ static struct {
u32 hotkey_wlsw:1;
u32 light:1;
u32 light_status:1;
+ u32 bright_16levels:1;
u32 wan:1;
u32 fan_ctrl_status_undef:1;
u32 input_device_registered:1;