linux-kernel - Re: [PATCH] backlight: Use id->driver_data to differentiate lp855x chips

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Date:	Thu, 22 Mar 2012 14:51:22 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Axel Lin <axel.lin@...il.com>
Cc:	linux-kernel@...r.kernel.org, Richard Purdie <rpurdie@...ys.net>,
	"Milo(Woogyom) Kim" <milo.kim@...com>
Subject: Re: [PATCH] backlight: Use id->driver_data to differentiate lp855x
 chips

On Wed, 21 Mar 2012 18:11:27 +0800
Axel Lin <axel.lin@...il.com> wrote:

> Current code has corresponding driver_data settings for different chip types.
> Use the driver_data to differentiate lp855x chips.
> 
> Also make lp855x_is_valid_rom_area() return bool instead of int.
> 
> -static int lp855x_is_valid_rom_area(struct lp855x *lp, u8 addr)
> +static bool lp855x_is_valid_rom_area(struct lp855x *lp, u8 addr)
>  {
>
> ...
>
> -	return (addr >= start && addr <= end) ? 1 : 0;
> +	return (addr >= start && addr <= end) ? true : false;
>  }

This:

--- a/drivers/video/backlight/lp855x_bl.c~backlight-use-id-driver_data-to-differentiate-lp855x-chips-fix
+++ a/drivers/video/backlight/lp855x_bl.c
@@ -82,7 +82,7 @@ static bool lp855x_is_valid_rom_area(str
 		return false;
 	}
 
-	return (addr >= start && addr <= end) ? true : false;
+	return (addr >= start && addr <= end);
 }
 
 static int lp855x_init_registers(struct lp855x *lp)
_

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