linux-kernel - Re: [PATCH] mfd: arizona: Correct type of gpio

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Date:	Mon, 30 Mar 2015 08:12:14 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
Cc:	sameo@...ux.intel.com, patches@...nsource.wolfsonmicro.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mfd: arizona: Correct type of gpio_defaults

On Sun, 29 Mar 2015, Charles Keepax wrote:

> gpio_defaults needs to be specified as an unsigned int rather than an
> int, because the intention of the DT binding is that all out of range
> values for a 16-bit register will cause the defaults to be used,
> however, if gpio_defaults is an int then values that are larger than
> INT_MAX will become negative numbers and be written out directly to the
> hardware. As no where in the code replies on gpio_defaults being an int,
> the simplest fix is to just change it to unsigned.
> 
> Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
> ---
>  include/linux/mfd/arizona/pdata.h |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)

Applied, thanks.

> diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h
> index 48fe313..1789cb0 100644
> --- a/include/linux/mfd/arizona/pdata.h
> +++ b/include/linux/mfd/arizona/pdata.h
> @@ -94,7 +94,7 @@ struct arizona_pdata {
>  	int gpio_base;
>  
>  	/** Pin state for GPIO pins */
> -	int gpio_defaults[ARIZONA_MAX_GPIO];
> +	unsigned int gpio_defaults[ARIZONA_MAX_GPIO];
>  
>  	/**
>  	 * Maximum number of channels clocks will be generated for,

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