linux-kernel - Re: [PATCH v2 2/2] backlight: add new lp8788 backlight driver

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Message-Id: <20121221142845.c5d6ebda.akpm@linux-foundation.org>
Date:	Fri, 21 Dec 2012 14:28:45 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Kim, Milo" <Milo.Kim@...com>
Cc:	Richard Purdie <rpurdie@...ys.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Thierry Reding <thierry.reding@...onic-design.de>
Subject: Re: [PATCH v2 2/2] backlight: add new lp8788 backlight driver

On Fri, 21 Dec 2012 07:55:23 +0000
"Kim, Milo" <Milo.Kim@...com> wrote:

> TI LP8788 PMU supports regulators, battery charger, RTC, ADC, backlight driver
> and current sinks.
> This patch enables LP8788 backlight module.
> 
> (Brightness mode)
> The brightness is controlled by PWM input or I2C register.
> All modes are supported in the driver.
> 
> (Platform data)
> Configurable data can be defined in the platform side.
>  name                  : backlight driver name. (default: "lcd-backlight")
>  initial_brightness    : initial value of backlight brightness
>  bl_mode               : brightness control by PWM or lp8788 register
>  dim_mode              : dimming mode selection
>  full_scale            : full scale current setting
>  rise_time             : brightness ramp up step time
>  fall_time             : brightness ramp down step time
>  pwm_pol               : PWM polarity setting when bl_mode is PWM based
>  period_ns             : platform specific PWM period value. unit is nano.

There's also

DEVICE_ATTR(bl_ctl_mode, S_IRUGO, lp8788_get_bl_ctl_mode, NULL);

which isn't documented anywhere?

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