diff options
| author | Milo Kim <milo.kim@ti.com> | 2013-11-13 03:08:57 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-13 07:09:14 +0400 |
| commit | 5812c13a4e636da4bd7f7cabbbbc59d9dbf3c86c (patch) | |
| tree | 7547afebf6d8f53030b4bfc2b95a3eb2b5bbfa54 /Documentation | |
| parent | b300645aec9a5d71f6d85d5138215a9d6d7fe5e6 (diff) | |
| download | linux-5812c13a4e636da4bd7f7cabbbbc59d9dbf3c86c.tar.xz | |
backlight: lp855x_bl: support new LP8555 device
LP8555 is one of the LP855x family devices.
This device needs pre_init_device() and post_init_device() driver
structure. It's same as LP8557, so the device configuration code is
shared with LP8557. Backlight outputs are generated from dual DC-DC boost
converters. It's configurable EPROM settings which are defined in the
platform data.
Driver documentation and device tree bindings are updated.
Signed-off-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/backlight/lp855x-driver.txt | 5 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/video/backlight/lp855x.txt | 29 |
2 files changed, 31 insertions, 3 deletions
diff --git a/Documentation/backlight/lp855x-driver.txt b/Documentation/backlight/lp855x-driver.txt index 1c732f0c6758..01bce243d3d7 100644 --- a/Documentation/backlight/lp855x-driver.txt +++ b/Documentation/backlight/lp855x-driver.txt @@ -4,7 +4,8 @@ Kernel driver lp855x Backlight driver for LP855x ICs Supported chips: - Texas Instruments LP8550, LP8551, LP8552, LP8553, LP8556 and LP8557 + Texas Instruments LP8550, LP8551, LP8552, LP8553, LP8555, LP8556 and + LP8557 Author: Milo(Woogyom) Kim <milo.kim@ti.com> @@ -24,7 +25,7 @@ Value : pwm based or register based 2) chip_id The lp855x chip id. -Value : lp8550/lp8551/lp8552/lp8553/lp8556/lp8557 +Value : lp8550/lp8551/lp8552/lp8553/lp8555/lp8556/lp8557 Platform data for lp855x ------------------------ diff --git a/Documentation/devicetree/bindings/video/backlight/lp855x.txt b/Documentation/devicetree/bindings/video/backlight/lp855x.txt index 1482103d288f..96e83a56048e 100644 --- a/Documentation/devicetree/bindings/video/backlight/lp855x.txt +++ b/Documentation/devicetree/bindings/video/backlight/lp855x.txt @@ -2,7 +2,7 @@ lp855x bindings Required properties: - compatible: "ti,lp8550", "ti,lp8551", "ti,lp8552", "ti,lp8553", - "ti,lp8556", "ti,lp8557" + "ti,lp8555", "ti,lp8556", "ti,lp8557" - reg: I2C slave address (u8) - dev-ctrl: Value of DEVICE CONTROL register (u8). It depends on the device. @@ -15,6 +15,33 @@ Optional properties: Example: + /* LP8555 */ + backlight@2c { + compatible = "ti,lp8555"; + reg = <0x2c>; + + dev-ctrl = /bits/ 8 <0x00>; + pwm-period = <10000>; + + /* 4V OV, 4 output LED0 string enabled */ + rom_14h { + rom-addr = /bits/ 8 <0x14>; + rom-val = /bits/ 8 <0xcf>; + }; + + /* Heavy smoothing, 24ms ramp time step */ + rom_15h { + rom-addr = /bits/ 8 <0x15>; + rom-val = /bits/ 8 <0xc7>; + }; + + /* 4 output LED1 string enabled */ + rom_19h { + rom-addr = /bits/ 8 <0x19>; + rom-val = /bits/ 8 <0x0f>; + }; + }; + /* LP8556 */ backlight@2c { compatible = "ti,lp8556"; |