linux-kernel - Re: [PATCH 2/2] usb: host: ehci-exynos: switch to using gpiod API

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Date:   Wed, 28 Sep 2022 11:15:31 -0400
From:   Alan Stern <stern@...land.harvard.edu>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] usb: host: ehci-exynos: switch to using gpiod API

On Tue, Sep 27, 2022 at 03:05:04PM -0700, Dmitry Torokhov wrote:
> This patch switches the driver from using legacy gpio API to the newer
> gpiod API.
> 
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> ---

Acked-by: Alan Stern <stern@...land.harvard.edu>

>  drivers/usb/host/ehci-exynos.c | 17 +++++------------
>  1 file changed, 5 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
> index c8e152c2e0ce..a333231616f4 100644
> --- a/drivers/usb/host/ehci-exynos.c
> +++ b/drivers/usb/host/ehci-exynos.c
> @@ -13,7 +13,7 @@
>  #include <linux/kernel.h>
>  #include <linux/module.h>
>  #include <linux/of.h>
> -#include <linux/of_gpio.h>
> +#include <linux/gpio/consumer.h>
>  #include <linux/phy/phy.h>
>  #include <linux/platform_device.h>
>  #include <linux/usb.h>
> @@ -131,20 +131,13 @@ static void exynos_ehci_phy_disable(struct device *dev)
>  
>  static void exynos_setup_vbus_gpio(struct device *dev)
>  {
> +	struct gpio_desc *gpio;
>  	int err;
> -	int gpio;
>  
> -	if (!dev->of_node)
> -		return;
> -
> -	gpio = of_get_named_gpio(dev->of_node, "samsung,vbus-gpio", 0);
> -	if (!gpio_is_valid(gpio))
> -		return;
> -
> -	err = devm_gpio_request_one(dev, gpio, GPIOF_OUT_INIT_HIGH,
> -				    "ehci_vbus_gpio");
> +	gpio = devm_gpiod_get_optional(dev, "samsung,vbus", GPIOD_OUT_HIGH);
> +	err = PTR_ERR_OR_ZERO(gpio);
>  	if (err)
> -		dev_err(dev, "can't request ehci vbus gpio %d", gpio);
> +		dev_err(dev, "can't request ehci vbus gpio: %d\n", err);
>  }
>  
>  static int exynos_ehci_probe(struct platform_device *pdev)
> -- 
> 2.38.0.rc1.362.ged0d419d3c-goog
>