linux-kernel - Re: [PATCH v3] drivers: gpio: zevio: drop of

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Message-ID: <CAHp75VcKF6CU5-MdSjw-_A+9SdLVZXh7FoJUEG5Uu7fGDDn3jA@mail.gmail.com>
Date:   Thu, 12 May 2022 12:37:07 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Moses Christopher Bollavarapu <mosescb.dev@...il.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] drivers: gpio: zevio: drop of_gpio.h header

On Thu, May 12, 2022 at 9:14 AM Moses Christopher Bollavarapu
<mosescb.dev@...il.com> wrote:
>
> Remove of_gpio.h header file, replace of_* functions and structs
> with appropriate alternatives.

LGTM,
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

> Signed-off-by: Moses Christopher Bollavarapu <mosescb.dev@...il.com>
> ---
>  V2 -> V3: Add missing return in front of dev_error_probe
>  V1 -> V2: Move gpio_chip member to top of the struct
>            Use dev_error_probe instead of dev_err
>            Minor style fixes
>
>  drivers/gpio/gpio-zevio.c | 25 ++++++++++++++-----------
>  1 file changed, 14 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpio/gpio-zevio.c b/drivers/gpio/gpio-zevio.c
> index f6f8a541348f..ce9d1282165c 100644
> --- a/drivers/gpio/gpio-zevio.c
> +++ b/drivers/gpio/gpio-zevio.c
> @@ -11,7 +11,6 @@
>  #include <linux/bitops.h>
>  #include <linux/io.h>
>  #include <linux/of_device.h>
> -#include <linux/of_gpio.h>
>  #include <linux/slab.h>
>  #include <linux/gpio/driver.h>
>
> @@ -53,22 +52,23 @@
>  #define ZEVIO_GPIO_BIT(gpio) (gpio&7)
>
>  struct zevio_gpio {
> +       struct gpio_chip        chip;
>         spinlock_t              lock;
> -       struct of_mm_gpio_chip  chip;
> +       void __iomem            *regs;
>  };
>
>  static inline u32 zevio_gpio_port_get(struct zevio_gpio *c, unsigned pin,
>                                         unsigned port_offset)
>  {
>         unsigned section_offset = ((pin >> 3) & 3)*ZEVIO_GPIO_SECTION_SIZE;
> -       return readl(IOMEM(c->chip.regs + section_offset + port_offset));
> +       return readl(IOMEM(c->regs + section_offset + port_offset));
>  }
>
>  static inline void zevio_gpio_port_set(struct zevio_gpio *c, unsigned pin,
>                                         unsigned port_offset, u32 val)
>  {
>         unsigned section_offset = ((pin >> 3) & 3)*ZEVIO_GPIO_SECTION_SIZE;
> -       writel(val, IOMEM(c->chip.regs + section_offset + port_offset));
> +       writel(val, IOMEM(c->regs + section_offset + port_offset));
>  }
>
>  /* Functions for struct gpio_chip */
> @@ -178,12 +178,15 @@ static int zevio_gpio_probe(struct platform_device *pdev)
>         platform_set_drvdata(pdev, controller);
>
>         /* Copy our reference */
> -       controller->chip.gc = zevio_gpio_chip;
> -       controller->chip.gc.parent = &pdev->dev;
> +       controller->chip = zevio_gpio_chip;
> +       controller->chip.parent = &pdev->dev;
>
> -       status = of_mm_gpiochip_add_data(pdev->dev.of_node,
> -                                        &(controller->chip),
> -                                        controller);
> +       controller->regs = devm_platform_ioremap_resource(pdev, 0);
> +       if (IS_ERR(controller->regs))
> +               return dev_err_probe(&pdev->dev, PTR_ERR(controller->regs),
> +                                    "failed to ioremap memory resource\n");
> +
> +       status = devm_gpiochip_add_data(&pdev->dev, &controller->chip, controller);
>         if (status) {
>                 dev_err(&pdev->dev, "failed to add gpiochip: %d\n", status);
>                 return status;
> @@ -192,10 +195,10 @@ static int zevio_gpio_probe(struct platform_device *pdev)
>         spin_lock_init(&controller->lock);
>
>         /* Disable interrupts, they only cause errors */
> -       for (i = 0; i < controller->chip.gc.ngpio; i += 8)
> +       for (i = 0; i < controller->chip.ngpio; i += 8)
>                 zevio_gpio_port_set(controller, i, ZEVIO_GPIO_INT_MASK, 0xFF);
>
> -       dev_dbg(controller->chip.gc.parent, "ZEVIO GPIO controller set up!\n");
> +       dev_dbg(controller->chip.parent, "ZEVIO GPIO controller set up!\n");
>
>         return 0;
>  }
> --
> 2.30.2
>


-- 
With Best Regards,
Andy Shevchenko