linux-kernel - Re: [PATCH 1/2] gpio: don't override irq_*

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Date:	Fri, 31 Jul 2015 17:54:27 +0300
From:	Grygorii Strashko <grygorii.strashko@...com>
To:	Rabin Vincent <rabin@....in>, <linus.walleij@...aro.org>,
	<gnurou@...il.com>
CC:	<linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] gpio: don't override irq_*_resources() callbacks

On 07/31/2015 03:48 PM, Rabin Vincent wrote:
> If the driver has specified its own irq_{request/release}_resources()
> functions, don't override them.  The gpio-etraxfs driver will use this.
> 
> Signed-off-by: Rabin Vincent <rabin@....in>
> ---
>   drivers/gpio/gpiolib.c | 8 ++++++--
>   1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> index bf4bd1d..6865874 100644
> --- a/drivers/gpio/gpiolib.c
> +++ b/drivers/gpio/gpiolib.c
> @@ -636,8 +636,12 @@ int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
>   		gpiochip->irqchip = NULL;
>   		return -EINVAL;
>   	}
> -	irqchip->irq_request_resources = gpiochip_irq_reqres;
> -	irqchip->irq_release_resources = gpiochip_irq_relres;
> +
> +	if (!irqchip->irq_request_resources &&
> +	    !irqchip->irq_release_resources) {
> +		irqchip->irq_request_resources = gpiochip_irq_reqres;
> +		irqchip->irq_release_resources = gpiochip_irq_relres;
> +	}

I think, it will be better to handle req/rel cases separately.

>   
>   	/*
>   	 * Prepare the mapping since the irqchip shall be orthogonal to
> 

Nice, thanks. I need the same actually, but I propose to make
gpiochip_irq_reqres/gpiochip_irq_relres public also, so drivers can re-use them.

-- 
regards,
-grygorii
--
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