On Tue, 2009-08-04 at 21:21 +0800, Pavel Machek wrote: > On Mon 2009-08-03 17:10:57, Zhang Rui wrote: > > Hi, all, > > > > This is the patch set I made to introduce ACPI ALS device driver > > and a generic sysfs I/F for all the ALS devices, like ACPI ALS, > > platform ALS, etc. > > > > Patch 01 introduces the ACPI ALS device driver. > > > > Patch 02 introduces ALS sysfs class. > > Two sysfs I/F are created for each ALS device. > > /sys/class/als/alsX/illuminance: > > the amount of light incident upon a specified surface area. > > /sys/class/als/alsX/mappings: > > ambient light illuminance to display luminance mappings > > that can be used by an OS to calibrate its ambient light policy > > this is what I got on a test box: > > cat /sys/class/als/als0/mappings > > ???Illuminance Adjustment > > 0 70 > > 10 73 > > 80 85 > > 300 100 > > 1000 150 > > There's one value per file for sysfs... You should definitely have the > header. > > Is there chance to already return adjusted values, avoiding this > uglyness? No, For a ALS policy, user space should set a brightness level as the base point, i.e. the backlight when display adjustment is 100. and then uses the adjustment values gotten from this mappings to calculate the actual brightness level the display should be put in. thanks, rui > > Plus I'd say Documentation/ file is needed. > > Pavel -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
