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authorMark Brown <broonie@opensource.wolfsonmicro.com>2009-09-05 14:09:20 +0100
committerRichard Purdie <rpurdie@linux.intel.com>2009-09-07 14:05:07 +0100
commita4f3d55cb0b8e1199e352c30ea9a264cef9c1ae1 (patch)
tree8b9fb9b49dde8139f31adf4e81037678c428aa59 /drivers/video/backlight/Kconfig
parente07cccf4046978df10f2e13fe2b99b2f9b3a65db (diff)
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backlight: Add WM831x backlight driver
The WM831x series of PMICs provide DC-DC boost convertors and current sinks which can be used together to drive LEDs for use as backlights. Expose this functionality via the backlight API. Since when used in this configuration the current sink and boost convertor are very tightly coupled with a multi-stage startup for the current sink which overlaps with the boost convertor startup this driver bypasses the regulator API. Machine inititialisation is responsible for ensuring that the regulators are not accessed via both APIs. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Diffstat (limited to 'drivers/video/backlight/Kconfig')
-rw-r--r--drivers/video/backlight/Kconfig7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index f9d19be..f86dbfd 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -229,3 +229,10 @@ config BACKLIGHT_SAHARA
help
If you have a Tabletkiosk Sahara Touch-iT, say y to enable the
backlight driver.
+
+config BACKLIGHT_WM831X
+ tristate "WM831x PMIC Backlight Driver"
+ depends on BACKLIGHT_CLASS_DEVICE && MFD_WM831X
+ help
+ If you have a backlight driven by the ISINK and DCDC of a
+ WM831x PMIC say y to enable the backlight driver for it.