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a9a84c37d1
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David Brownell a9a84c37d1 atmel_lcdfb: backlight control 
On the sam9 EK boards, the LCD backlight is hooked up to a PWM output from
the LCD controller.  It's controlled by "contrast" registers though.

This patch lets boards declare that they have that kind of backlight
control.  The driver can then export this control, letting screenblank and
other operations actually take effect ...  reducing the typically
substantial power drain from the backlight.

Note that it's not fully cooked
  - doesn't force backlight off during system suspend
  - the "power" and "blank" events may not be done right
This should be easily added in the future.

[nicolas.ferre@atmel.com: remove unneeded inline and rename functions]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Andrew Victor <linux@maxim.org.za>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06 10:41:16 -08:00
..
acorn/char
acpi latency.c: use QoS infrastructure 2008-02-05 09:44:22 -08:00
amba
ata iommu sg merging: sata_inic162x: use pci_set_dma_max_seg_size 2008-02-05 09:44:11 -08:00
atm [ATM]: [he] fixing compilation when you define USE_RBPS_POOL/USE_RBPL_POOL 2008-01-28 15:00:15 -08:00
auxdisplay
base register_cpu __devinit or __cpuinit 2008-02-06 10:41:01 -08:00
block Atari floppy: Rename disk_type to atari_disk_type 2008-02-06 10:41:10 -08:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-02-05 10:09:07 -08:00
cdrom drivers/cdrom/cdrom.c: simplify logic in cdrom_release() 2008-02-06 10:41:10 -08:00
char ip27-rtc: convert ioctl to unlocked_ioctl 2008-02-06 10:41:14 -08:00
clocksource
connector [NETNS]: Consolidate kernel netlink socket destruction. 2008-01-28 15:08:07 -08:00
cpufreq cpufreq: fix obvious condition statement error 2008-01-30 13:33:34 +01:00
cpuidle pm qos infrastructure and interface 2008-02-05 09:44:22 -08:00
crypto [S390] crypto: move s390 Kconfig options. 2008-01-26 14:11:17 +01:00
dca
dio dio: ARRAY_SIZE() cleanup 2008-02-05 09:44:23 -08:00
dma
edac drivers/edac/: Spelling fixes 2008-02-03 17:12:34 +02:00
eisa
firewire firewire: fw-sbp2: Use sbp2 device-provided mgt orb timeout for logins 2008-01-30 22:22:29 +01:00
firmware dcdbas: add DMI-based module autloading 2008-02-06 10:41:01 -08:00
gpio gpio: handle pca953{4,5,6,7,8} too 2008-02-06 10:41:15 -08:00
hid HID: ADS/Tech Radio si470x needs blacklist entry 2008-01-28 14:51:23 +01:00
hwmon
i2c deprecate obsolete pca9539 driver 2008-02-05 09:44:13 -08:00
ide cleanup after APUS removal 2008-02-06 10:41:01 -08:00
ieee1394 ieee1394: sbp2: fix bogus s/g access change 2008-02-02 13:48:16 +01:00
infiniband RDMA/nes: Add a driver for NetEffect RNICs 2008-02-04 20:20:45 -08:00
input Remove pointless casts from void pointers 2008-02-06 10:41:01 -08:00
isdn drivers/isdn/hardware/eicon/debug.c: fix uninitialized var warning 2008-02-06 10:41:12 -08:00
leds leds: add possibility to remove leds classdevs during suspend/resume 2008-02-05 09:44:23 -08:00
lguest virtio: reset function 2008-02-04 23:50:03 +11:00
macintosh ppc: fix #ifdef-s in mediabay driver (take 2) 2008-02-06 02:57:50 +01:00
mca
md
media scheduled OSS driver removal 2008-02-06 10:41:02 -08:00
message drivers/message/: Spelling fixes 2008-02-03 17:21:01 +02:00
mfd [ARM] Fix class_device damage caused by 0c55445f20 2008-01-28 10:59:09 +00:00
misc phantom: don't grab other devices 2008-02-06 10:41:10 -08:00
mmc Merge branch 'blk-end-request' of git://git.kernel.dk/linux-2.6-block 2008-01-29 08:51:32 +11:00
mtd Claim maintainership for block2mtd and update email addresses 2008-02-06 10:41:09 -08:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-02-05 10:09:07 -08:00
nubus nubus: kill drivers/nubus/nubus_syms.c 2008-02-05 09:44:23 -08:00
of
oprofile
parisc iommu sg merging: parisc: make iommu respect the segment size limits 2008-02-05 09:44:10 -08:00
parport parport_pc: detection for SuperIO IT87XX POST 2008-02-06 10:41:08 -08:00
pci Genericizing iova.[ch] 2008-02-06 10:41:01 -08:00
pcmcia drivers/pcmcia: add missing pci_dev_get 2008-02-05 09:44:09 -08:00
pnp git-x86: drivers/pnp/pnpbios/bioscalls.c build fix 2008-01-30 13:32:31 +01:00
power apm_power: check I.intval for zero value, we use it as the divisor 2008-02-02 02:44:34 +03:00
ps3
rapidio Merge branch 'linux-2.6' 2008-01-31 11:25:51 +11:00
rtc rtc: at91sam9 RTC support (RTT and/or RTC) 2008-02-06 10:41:14 -08:00
s390 calibrate_delay() must be __cpuinit 2008-02-06 10:41:08 -08:00
sbus
scsi cleanup after APUS removal 2008-02-06 10:41:01 -08:00
serial SC26XX: New serial driver for SC2681 uarts 2008-02-06 10:41:06 -08:00
sh
sn
spi spi: remove more dev->power.power_state usage 2008-02-06 10:41:11 -08:00
ssb drivers/ssb/: Spelling fixes 2008-02-03 17:30:25 +02:00
tc
telephony
uio uio: nopage 2008-02-06 10:41:07 -08:00
usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/pci-2.6 2008-02-02 14:29:33 +11:00
video atmel_lcdfb: backlight control 2008-02-06 10:41:16 -08:00
virtio virtio: balloon driver 2008-02-04 23:50:13 +11:00
w1 w1-gpio: add GPIO w1 bus master driver 2008-02-06 10:41:15 -08:00
watchdog drivers/watchdog/: Spelling fixes 2008-02-03 17:32:52 +02:00
xen
zorro
Kconfig gpiolib: add drivers/gpio directory 2008-02-05 09:44:12 -08:00
Makefile gpiolib: add drivers/gpio directory 2008-02-05 09:44:12 -08:00