linux-kernel - Re: [PATCH 60/62] gpio: gpio-zynq: Use new GPIO_LINE

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Message-ID: <2096366f-c2bc-28a2-009c-4a35f6bfc37a@xilinx.com>
Date:   Tue, 5 Nov 2019 11:56:38 +0100
From:   Michal Simek <michal.simek@...inx.com>
To:     Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
        mazziesaccount@...il.com
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Michal Simek <michal.simek@...inx.com>,
        linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 60/62] gpio: gpio-zynq: Use new GPIO_LINE_DIRECTION

On 05. 11. 19 11:40, Matti Vaittinen wrote:
> It's hard for occasional GPIO code reader/writer to know if values 0/1
> equal to IN or OUT. Use defined GPIO_LINE_DIRECTION_IN and
> GPIO_LINE_DIRECTION_OUT to help them out.
> 
> Signed-off-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
> ---
>  drivers/gpio/gpio-zynq.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c
> index cd475ff4bcad..4c3f6370eab4 100644
> --- a/drivers/gpio/gpio-zynq.c
> +++ b/drivers/gpio/gpio-zynq.c
> @@ -360,7 +360,7 @@ static int zynq_gpio_dir_out(struct gpio_chip *chip, unsigned int pin,
>   *
>   * This function returns the direction of the specified GPIO.
>   *
> - * Return: 0 for output, 1 for input
> + * Return: GPIO_LINE_DIRECTION_OUT or GPIO_LINE_DIRECTION_IN
>   */
>  static int zynq_gpio_get_direction(struct gpio_chip *chip, unsigned int pin)
>  {
> @@ -372,7 +372,10 @@ static int zynq_gpio_get_direction(struct gpio_chip *chip, unsigned int pin)
>  
>  	reg = readl_relaxed(gpio->base_addr + ZYNQ_GPIO_DIRM_OFFSET(bank_num));
>  
> -	return !(reg & BIT(bank_pin_num));
> +	if (reg & BIT(bank_pin_num))
> +		return GPIO_LINE_DIRECTION_OUT;
> +
> +	return GPIO_LINE_DIRECTION_IN;
>  }
>  
>  /**
> 

Reviewed-by: Michal Simek <michal.simek@...inx.com>

Thanks,
Michal