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SubjectRe: [PATCH] backlight: Add TI LMU backlight driver
Hi,

On Mon, Mar 20, 2017 at 11:21:04AM +0900, Milo Kim wrote:
> This is consolidated driver which supports backlight devices below.
> LM3532, LM3631, LM3632, LM3633, LM3695 and LM3697.
>
> Structure
> ---------
> It consists of two parts - core and data.
>
> Core part supports features below.
> - Backlight subsystem control
> - Channel configuration from DT properties
> - Light dimming effect control: ramp up and down.
> - LMU fault monitor notifier handling
> - PWM brightness control
>
> Data part describes device specific data.
> - Register value configuration for each LMU device
> : initialization, channel configuration, control mode, enable and
> brightness.
> - PWM action configuration
> - Light dimming effect table
> - Option for LMU fault monitor support
>
> Macros for register data
> ------------------------
> All LMU devices have 8-bit based registers. LMU_BL_REG() creates 24-bit
> register value in data part. It consists of address, mask and value.
> On the other hand, register value should be parsed when the driver
> reads/writes data from/to I2C registers. Driver uses LMU_BL_GET_ADDR(),
> LMU_BL_GET_MASK() and LMU_BL_GET_VAL() for this purpose.
>
> Data structure
> --------------
> ti_lmu_bl: Backlight output channel data
> ti_lmu_bl_chip: Backlight device data. One device can have multiple
> backlight channel data.
> ti_lmu_bl_reg: Backlight device register data
> ti_lmu_bl_cfg: Backlight configuration data for each LMU device
>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Sebastian Reichel <sre@kernel.org>
> Cc: Tony Lindgren <tony@atomide.com>
> Signed-off-by: Milo Kim <milo.kim@ti.com>

Works on Droid 4:

Tested-by: Sebastian Reichel <sre@kernel.org>

-- Sebastian
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