5812c13a4e
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>
68 lines
1.5 KiB
Text
68 lines
1.5 KiB
Text
lp855x bindings
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Required properties:
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- compatible: "ti,lp8550", "ti,lp8551", "ti,lp8552", "ti,lp8553",
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"ti,lp8555", "ti,lp8556", "ti,lp8557"
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- reg: I2C slave address (u8)
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- dev-ctrl: Value of DEVICE CONTROL register (u8). It depends on the device.
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Optional properties:
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- bl-name: Backlight device name (string)
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- init-brt: Initial value of backlight brightness (u8)
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- pwm-period: PWM period value. Set only PWM input mode used (u32)
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- rom-addr: Register address of ROM area to be updated (u8)
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- rom-val: Register value to be updated (u8)
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Example:
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/* LP8555 */
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backlight@2c {
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compatible = "ti,lp8555";
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reg = <0x2c>;
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dev-ctrl = /bits/ 8 <0x00>;
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pwm-period = <10000>;
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/* 4V OV, 4 output LED0 string enabled */
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rom_14h {
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rom-addr = /bits/ 8 <0x14>;
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rom-val = /bits/ 8 <0xcf>;
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};
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/* Heavy smoothing, 24ms ramp time step */
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rom_15h {
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rom-addr = /bits/ 8 <0x15>;
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rom-val = /bits/ 8 <0xc7>;
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};
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/* 4 output LED1 string enabled */
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rom_19h {
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rom-addr = /bits/ 8 <0x19>;
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rom-val = /bits/ 8 <0x0f>;
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};
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};
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/* LP8556 */
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backlight@2c {
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compatible = "ti,lp8556";
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reg = <0x2c>;
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bl-name = "lcd-bl";
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dev-ctrl = /bits/ 8 <0x85>;
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init-brt = /bits/ 8 <0x10>;
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};
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/* LP8557 */
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backlight@2c {
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compatible = "ti,lp8557";
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reg = <0x2c>;
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dev-ctrl = /bits/ 8 <0x41>;
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init-brt = /bits/ 8 <0x0a>;
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/* 4V OV, 4 output LED string enabled */
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rom_14h {
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rom-addr = /bits/ 8 <0x14>;
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rom-val = /bits/ 8 <0xcf>;
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};
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};
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