linux-kernel - Re: [PATCH 1/5] powerpc: sysdev/gpio: use new line value setter callbacks

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Message-ID: <0b2ca5c5-cad2-46f1-bc3a-f69d926443e9@csgroup.eu>
Date: Wed, 30 Apr 2025 19:35:11 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Bartosz Golaszewski <brgl@...ev.pl>,
 Madhavan Srinivasan <maddy@...ux.ibm.com>,
 Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>,
 Naveen N Rao <naveen@...nel.org>, Linus Walleij <linus.walleij@...aro.org>,
 Anatolij Gustschin <agust@...x.de>
Cc: linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
 linux-gpio@...r.kernel.org,
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH 1/5] powerpc: sysdev/gpio: use new line value setter
 callbacks



Le 08/04/2025 à 09:21, Bartosz Golaszewski a écrit :
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> 
> struct gpio_chip now has callbacks for setting line values that return
> an integer, allowing to indicate failures. Convert the driver to using
> them.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Reviewed-by: Christophe Leroy <christophe.leroy@...roup.eu>

> ---
>   arch/powerpc/sysdev/cpm_common.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c
> index 47db732981a8..e22fc638dbc7 100644
> --- a/arch/powerpc/sysdev/cpm_common.c
> +++ b/arch/powerpc/sysdev/cpm_common.c
> @@ -138,7 +138,7 @@ static void __cpm2_gpio32_set(struct of_mm_gpio_chip *mm_gc, u32 pin_mask,
>   	out_be32(&iop->dat, cpm2_gc->cpdata);
>   }
>   
> -static void cpm2_gpio32_set(struct gpio_chip *gc, unsigned int gpio, int value)
> +static int cpm2_gpio32_set(struct gpio_chip *gc, unsigned int gpio, int value)
>   {
>   	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
>   	struct cpm2_gpio32_chip *cpm2_gc = gpiochip_get_data(gc);
> @@ -150,6 +150,8 @@ static void cpm2_gpio32_set(struct gpio_chip *gc, unsigned int gpio, int value)
>   	__cpm2_gpio32_set(mm_gc, pin_mask, value);
>   
>   	spin_unlock_irqrestore(&cpm2_gc->lock, flags);
> +
> +	return 0;
>   }
>   
>   static int cpm2_gpio32_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
> @@ -208,7 +210,7 @@ int cpm2_gpiochip_add32(struct device *dev)
>   	gc->direction_input = cpm2_gpio32_dir_in;
>   	gc->direction_output = cpm2_gpio32_dir_out;
>   	gc->get = cpm2_gpio32_get;
> -	gc->set = cpm2_gpio32_set;
> +	gc->set_rv = cpm2_gpio32_set;
>   	gc->parent = dev;
>   	gc->owner = THIS_MODULE;
>   
>