linux-kernel - Re: [PATCH v2 2/9] mfd: arizona: Factor out hard reset into helper functions

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Message-ID: <20150429122651.GG9169@x1>
Date:	Wed, 29 Apr 2015 13:26:51 +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 2/9] mfd: arizona: Factor out hard reset into helper
 functions

On Fri, 17 Apr 2015, Charles Keepax wrote:

> This patch adds functions for enabling and disabling the physical reset
> line. This will be helpful in future refactoring.
> 
> Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
> ---
>  drivers/mfd/arizona-core.c |   25 +++++++++++++++++--------
>  1 files changed, 17 insertions(+), 8 deletions(-)

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

> diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
> index be8b1a4..c0e8a96 100644
> --- a/drivers/mfd/arizona-core.c
> +++ b/drivers/mfd/arizona-core.c
> @@ -250,6 +250,20 @@ static int arizona_wait_for_boot(struct arizona *arizona)
>  	return ret;
>  }
>  
> +static inline void arizona_enable_reset(struct arizona *arizona)
> +{
> +	if (arizona->pdata.reset)
> +		gpio_set_value_cansleep(arizona->pdata.reset, 0);
> +}
> +
> +static void arizona_disable_reset(struct arizona *arizona)
> +{
> +	if (arizona->pdata.reset) {
> +		gpio_set_value_cansleep(arizona->pdata.reset, 1);
> +		msleep(1);
> +	}
> +}
> +
>  static int arizona_apply_hardware_patch(struct arizona* arizona)
>  {
>  	unsigned int fll, sysclk;
> @@ -751,10 +765,7 @@ int arizona_dev_init(struct arizona *arizona)
>  		goto err_enable;
>  	}
>  
> -	if (arizona->pdata.reset) {
> -		gpio_set_value_cansleep(arizona->pdata.reset, 1);
> -		msleep(1);
> -	}
> +	arizona_disable_reset(arizona);
>  
>  	regcache_cache_only(arizona->regmap, false);
>  
> @@ -1054,8 +1065,7 @@ int arizona_dev_init(struct arizona *arizona)
>  err_irq:
>  	arizona_irq_exit(arizona);
>  err_reset:
> -	if (arizona->pdata.reset)
> -		gpio_set_value_cansleep(arizona->pdata.reset, 0);
> +	arizona_enable_reset(arizona);
>  	regulator_disable(arizona->dcvdd);
>  err_enable:
>  	regulator_bulk_disable(arizona->num_core_supplies,
> @@ -1080,8 +1090,7 @@ int arizona_dev_exit(struct arizona *arizona)
>  	arizona_free_irq(arizona, ARIZONA_IRQ_OVERCLOCKED, arizona);
>  	arizona_free_irq(arizona, ARIZONA_IRQ_CLKGEN_ERR, arizona);
>  	arizona_irq_exit(arizona);
> -	if (arizona->pdata.reset)
> -		gpio_set_value_cansleep(arizona->pdata.reset, 0);
> +	arizona_enable_reset(arizona);
>  
>  	regulator_bulk_disable(arizona->num_core_supplies,
>  			       arizona->core_supplies);

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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