linux-kernel - Re: [PATCH] pinctrl: sirf: remove sirfsoc_gpio_set

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Message-ID: <CAGsJ_4xemz4EBdWPDrdkhD5HsCXJcO_kkKGugEa9C7_rieyq8A@mail.gmail.com>
Date:	Wed, 10 Oct 2012 00:31:07 +0800
From:	Barry Song <21cnbao@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Barry Song <Baohua.Song@....com>,
	DL-SHA-WorkGroupLinux <workgroup.linux@....com>
Subject: Re: [PATCH] pinctrl: sirf: remove sirfsoc_gpio_set_pull function

Hi Arnd,

2012/10/9 Arnd Bergmann <arnd@...db.de>:
> The prima2 platform advertises needing no mach/gpio.h header file,
> but its pinctrl driver now has a sirfsoc_gpio_set_pull function
> that uses constants defined in arch/arm/mach-prima2/include/mach/gpio.h,
> which fails to build.
>
> Fortunately, the sirfsoc_gpio_set_pull is not used anywhere in the
> kernel, so we can safely remove it. Any out of tree drivers using
> it will have to be converted to use proper pinctrl functions to
> do the same.
>

i understand we want to delete the mach/gpio.h. originally we had
sirfsoc_gpio_set_pull() as a prima2 customized pull config function.

i will take care moving to the dt mapping for pullup/down/none.


> Without this patch, building prima2_defconfig results in:
>
> drivers/pinctrl/pinctrl-sirf.c: In function 'sirfsoc_gpio_set_pull':
> drivers/pinctrl/pinctrl-sirf.c:1331:7: error: 'SIRFSOC_GPIO_PULL_NONE' undeclared (first use in this function)
> drivers/pinctrl/pinctrl-sirf.c:1331:7: note: each undeclared identifier is reported only once for each function it appears in
> drivers/pinctrl/pinctrl-sirf.c:1334:7: error: 'SIRFSOC_GPIO_PULL_UP' undeclared (first use in this function)
> drivers/pinctrl/pinctrl-sirf.c:1338:7: error: 'SIRFSOC_GPIO_PULL_DOWN' undeclared (first use in this function)
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Cc: Barry Song <Baohua.Song@....com>
> Cc: Linus Walleij <linus.walleij@...aro.org>

Acked-by: Barry Song <Baohua.Song@....com>

>
> diff --git a/arch/arm/mach-prima2/include/mach/gpio.h b/arch/arm/mach-prima2/include/mach/gpio.h
> deleted file mode 100644
> index 1904bb0..0000000
> --- a/arch/arm/mach-prima2/include/mach/gpio.h
> +++ /dev/null
> @@ -1,13 +0,0 @@
> -#ifndef __MACH_GPIO_H
> -#define __MACH_GPIO_H
> -
> -/* Pull up/down values */
> -enum sirfsoc_gpio_pull {
> -       SIRFSOC_GPIO_PULL_NONE,
> -       SIRFSOC_GPIO_PULL_UP,
> -       SIRFSOC_GPIO_PULL_DOWN,
> -};
> -
> -void sirfsoc_gpio_set_pull(unsigned gpio, unsigned mode);
> -
> -#endif
> diff --git a/drivers/pinctrl/pinctrl-sirf.c b/drivers/pinctrl/pinctrl-sirf.c
> index 675497c..9ecacf3 100644
> --- a/drivers/pinctrl/pinctrl-sirf.c
> +++ b/drivers/pinctrl/pinctrl-sirf.c
> @@ -1323,41 +1323,6 @@ static inline struct sirfsoc_gpio_bank *sirfsoc_gpio_to_bank(unsigned int gpio)
>         return &sgpio_bank[gpio / SIRFSOC_GPIO_BANK_SIZE];
>  }
>
> -void sirfsoc_gpio_set_pull(unsigned gpio, unsigned mode)
> -{
> -       struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(gpio);
> -       int idx = sirfsoc_gpio_to_offset(gpio);
> -       u32 val, offset;
> -       unsigned long flags;
> -
> -       offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
> -
> -       spin_lock_irqsave(&sgpio_lock, flags);
> -
> -       val = readl(bank->chip.regs + offset);
> -
> -       switch (mode) {
> -       case SIRFSOC_GPIO_PULL_NONE:
> -               val &= ~SIRFSOC_GPIO_CTL_PULL_MASK;
> -               break;
> -       case SIRFSOC_GPIO_PULL_UP:
> -               val |= SIRFSOC_GPIO_CTL_PULL_MASK;
> -               val |= SIRFSOC_GPIO_CTL_PULL_HIGH;
> -               break;
> -       case SIRFSOC_GPIO_PULL_DOWN:
> -               val |= SIRFSOC_GPIO_CTL_PULL_MASK;
> -               val &= ~SIRFSOC_GPIO_CTL_PULL_HIGH;
> -               break;
> -       default:
> -               break;
> -       }
> -
> -       writel(val, bank->chip.regs + offset);
> -
> -       spin_unlock_irqrestore(&sgpio_lock, flags);
> -}
> -EXPORT_SYMBOL(sirfsoc_gpio_set_pull);
> -
>  static inline struct sirfsoc_gpio_bank *sirfsoc_irqchip_to_bank(struct gpio_chip *chip)
>  {
>         return container_of(to_of_mm_gpio_chip(chip), struct sirfsoc_gpio_bank, chip);

-barry
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