linux-kernel - Re: [PATCH/RFC v10 07/19] mfd: max77693: Adjust FLASH_EN_SHIFT and TORCH_EN

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Message-ID: <20150120111719.GF13701@x1>
Date:	Tue, 20 Jan 2015 11:17:19 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Jacek Anaszewski <j.anaszewski@...sung.com>
Cc:	linux-leds@...r.kernel.org, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	kyungmin.park@...sung.com, b.zolnierkie@...sung.com, pavel@....cz,
	cooloney@...il.com, rpurdie@...ys.net, sakari.ailus@....fi,
	s.nawrocki@...sung.com, Chanwoo Choi <cw00.choi@...sung.com>
Subject: Re: [PATCH/RFC v10 07/19] mfd: max77693: Adjust FLASH_EN_SHIFT and
 TORCH_EN_SHIFT macros

On Fri, 09 Jan 2015, Jacek Anaszewski wrote:

> Modify FLASH_EN_SHIFT and TORCH_EN_SHIFT macros to work properly
> when passed enum max77693_fled values (0 for FLED1 and 1 for FLED2)
> from leds-max77693 driver.

Off-by-one ay?  Wasn't the original code tested?

> Signed-off-by: Jacek Anaszewski <j.anaszewski@...sung.com>
> Acked-by: Kyungmin Park <kyungmin.park@...sung.com>
> Cc: Chanwoo Choi <cw00.choi@...sung.com>
> Cc: Lee Jones <lee.jones@...aro.org>
> ---
>  include/linux/mfd/max77693-private.h |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/mfd/max77693-private.h b/include/linux/mfd/max77693-private.h
> index 08dae01..01799a9 100644
> --- a/include/linux/mfd/max77693-private.h
> +++ b/include/linux/mfd/max77693-private.h
> @@ -113,8 +113,8 @@ enum max77693_pmic_reg {
>  #define FLASH_EN_FLASH		0x1
>  #define FLASH_EN_TORCH		0x2
>  #define FLASH_EN_ON		0x3
> -#define FLASH_EN_SHIFT(x)	(6 - ((x) - 1) * 2)
> -#define TORCH_EN_SHIFT(x)	(2 - ((x) - 1) * 2)
> +#define FLASH_EN_SHIFT(x)	(6 - (x) * 2)
> +#define TORCH_EN_SHIFT(x)	(2 - (x) * 2)
>  
>  /* MAX77693 MAX_FLASH1 register */
>  #define MAX_FLASH1_MAX_FL_EN	0x80

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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