linux-kernel - Re: [PATCH v2 1/9] mfd: arizona: Use devres to manage reset GPIO

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Message-ID: <20150429122735.GH9169@x1>
Date:	Wed, 29 Apr 2015 13:27:35 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
Cc:	broonie@...nel.org, sameo@...ux.intel.com,
	linux-kernel@...r.kernel.org, lgirdwood@...il.com,
	patches@...nsource.wolfsonmicro.com
Subject: Re: [PATCH v2 1/9] mfd: arizona: Use devres to manage reset GPIO

On Fri, 17 Apr 2015, Charles Keepax wrote:

> This also handily fixes a leak of the GPIO in arizona_dev_exit.
> 
> Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
> ---
>  drivers/mfd/arizona-core.c |   10 ++++------
>  1 files changed, 4 insertions(+), 6 deletions(-)

Acked-by: Lee Jones <lee.jones@...aro.org>

> diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
> index 6ca6dfa..be8b1a4 100644
> --- a/drivers/mfd/arizona-core.c
> +++ b/drivers/mfd/arizona-core.c
> @@ -728,9 +728,9 @@ int arizona_dev_init(struct arizona *arizona)
>  
>  	if (arizona->pdata.reset) {
>  		/* Start out with /RESET low to put the chip into reset */
> -		ret = gpio_request_one(arizona->pdata.reset,
> -				       GPIOF_DIR_OUT | GPIOF_INIT_LOW,
> -				       "arizona /RESET");
> +		ret = devm_gpio_request_one(arizona->dev, arizona->pdata.reset,
> +					    GPIOF_DIR_OUT | GPIOF_INIT_LOW,
> +					    "arizona /RESET");
>  		if (ret != 0) {
>  			dev_err(dev, "Failed to request /RESET: %d\n", ret);
>  			goto err_dcvdd;
> @@ -1054,10 +1054,8 @@ int arizona_dev_init(struct arizona *arizona)
>  err_irq:
>  	arizona_irq_exit(arizona);
>  err_reset:
> -	if (arizona->pdata.reset) {
> +	if (arizona->pdata.reset)
>  		gpio_set_value_cansleep(arizona->pdata.reset, 0);
> -		gpio_free(arizona->pdata.reset);
> -	}
>  	regulator_disable(arizona->dcvdd);
>  err_enable:
>  	regulator_bulk_disable(arizona->num_core_supplies,

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