RE: [PATCH] leds-lm3530: support pwm input mode and addplatform data

[Kim, Milo]

Thanks for your advice.
OK, I'll re-patch them separately.

Best Regard,
Milo -

-----Original Message-----
From: Linus Walleij [mailto:linus.walleij@xxxxxxxxxx] 
Sent: Friday, January 20, 2012 2:58 AM
To: Kim, Milo
Cc: shreshthakumar.sahu@xxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; D.Murphy@xxxxxxxxxxxx; rpurdie@xxxxxxxxx
Subject: Re: [PATCH] leds-lm3530: support pwm input mode and add platform data

On Thu, Jan 19, 2012 at 5:36 AM, Kim, Milo <Milo.Kim@xxxxxx> wrote:

> (a) support pwm control mode
>  (1) add 'struct lm3530_pwm_data' in the platform data
>  The pwm data is the platform specific functions which generate the pwm.
>  The pwm data is only valid when brightness is pwm input mode.
>  Functions should be implemented by the pwm driver.
>  pwm_set_intensity() : set duty of pwm.
>  pwm_get_intensity() : get current duty of pwm.
>
>  (2) brightness control by pwm
>  If the control mode is pwm, then brightness is changed by the duty of pwm.
>  So pwm platform function should be called in lm3530_brightness_set().
>
>  (3) do not update brightness register when pwm input mode
>  In pwm input mode, brightness register is not used.
>  If any value is updated in this register, then the led will be off.
>
> (b) add 'name' in the lm3530_platform_data
>  : The led device name can be configurable.
>  For the compatibility, the name is set to default value(LM3530_LED_DEV)
>  when 'name' is not defined.
>
> (c) add 'is_vin_always_on' in the lm3530_platform_data
>  : The 'IN' pin(Input voltage connection) can be always turned on
>  in case it is connected with VBATT.
>  To support this case, 'is_vin_always_on' is added.
>  If VIN is always on, then we don't need to control the regulator for IN pin.
>
> (d) add 'lm3530_mode_get()' in the lm3530 device attribute
>  : To get information about brightness control mode.
>
> (e) use 'struct led_classdev' rather than 'struct i2c_client'
>  to get members of lm3530_data
>  : in lm3530_mode_set()
>
> (f) use 'pdata' rather than 'pltfm' in lm3530_init_registers()
>
> (g) for less arithmetic operation, replace 'divide-by-2' with
>  'shift-right-by 1 bit'
>  : in lm3530_brightness_set()

Very nice patch, but please split it into one patch per subject
(a) through (g) as per Documentation/SubmittingPatches,
this makes it easier to review and git bisect.

Yours,
Linus Walleij

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/