linux-kernel - Re: [PATCH 2/2] gpio: bcm-kona: use platform_irq

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Date:   Tue, 3 Dec 2019 07:57:51 +0100
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Peng Fan <peng.fan@....com>
Cc:     "rjui@...adcom.com" <rjui@...adcom.com>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        "bgolaszewski@...libre.com" <bgolaszewski@...libre.com>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "sbranden@...adcom.com" <sbranden@...adcom.com>,
        "thierry.reding@...il.com" <thierry.reding@...il.com>,
        "robh@...nel.org" <robh@...nel.org>,
        "bcm-kernel-feedback-list@...adcom.com" 
        <bcm-kernel-feedback-list@...adcom.com>,
        dl-linux-imx <linux-imx@....com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-pwm@...r.kernel.org" <linux-pwm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Alice Guo <alice.guo@....com>
Subject: Re: [PATCH 2/2] gpio: bcm-kona: use platform_irq_count

On Tue, Dec 03, 2019 at 06:04:27AM +0000, Peng Fan wrote:
> From: Peng Fan <peng.fan@....com>
> 
> Use platform_irq_count to replace of_irq_count
> 
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
> 
> V1:
>  Code inspection, not tested
> 
>  drivers/gpio/gpio-bcm-kona.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-bcm-kona.c b/drivers/gpio/gpio-bcm-kona.c
> index 4122683eb1f9..c50721980a7c 100644
> --- a/drivers/gpio/gpio-bcm-kona.c
> +++ b/drivers/gpio/gpio-bcm-kona.c
> @@ -19,7 +19,6 @@
>  #include <linux/io.h>
>  #include <linux/gpio/driver.h>
>  #include <linux/of_device.h>
> -#include <linux/of_irq.h>
>  #include <linux/init.h>
>  #include <linux/irqdomain.h>
>  #include <linux/irqchip/chained_irq.h>
> @@ -586,7 +585,7 @@ static int bcm_kona_gpio_probe(struct platform_device *pdev)
>  
>  	kona_gpio->gpio_chip = template_chip;
>  	chip = &kona_gpio->gpio_chip;
> -	kona_gpio->num_bank = of_irq_count(dev->of_node);
> +	kona_gpio->num_bank = platform_irq_count(pdev);

of_irq_count returns 0 or a positive int while platform_irq_count might
return a negative error code. This needs handling. Also I wonder why
platform_irq_count() is better than of_irq_count() which would be good
to describe in the commit log.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |