Re: [PATCH] pinctrl: at91: convert __raw to endian agnostic IO

[Nicolas Ferre <nicolas.ferre@atmel.com>]

Le 26/03/2015 13:18, Ben Dooks a écrit :
> Use endian agnostic _relaxed IO accessors instead of the __raw ones.
> 
> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
> --
> CC: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com> (maintainer:PIN CONTROLLER -...)
> CC: Linus Walleij <linus.walleij@linaro.org> (maintainer:PIN CONTROL SUBSY...)
> CC: linux-arm-kernel@lists.infradead.org (moderated list:PIN CONTROLLER -...)
> CC: linux-gpio@vger.kernel.org (open list:PIN CONTROL SUBSY...)
> CC: Andrew Victor <linux@maxim.org.za>
> CC: Nicolas Ferre <nicolas.ferre@atmel.com>

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

> CC: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
> ---
>  drivers/pinctrl/pinctrl-at91.c | 50 +++++++++++++++++++++---------------------
>  1 file changed, 25 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
> index f4cd0b9..cdd47dc 100644
> --- a/drivers/pinctrl/pinctrl-at91.c
> +++ b/drivers/pinctrl/pinctrl-at91.c
> @@ -451,18 +451,18 @@ static enum at91_mux at91_mux_get_periph(void __iomem *pio, unsigned mask)
>  
>  static bool at91_mux_get_deglitch(void __iomem *pio, unsigned pin)
>  {
> -	return (__raw_readl(pio + PIO_IFSR) >> pin) & 0x1;
> +	return (readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1;
>  }
>  
>  static void at91_mux_set_deglitch(void __iomem *pio, unsigned mask, bool is_on)
>  {
> -	__raw_writel(mask, pio + (is_on ? PIO_IFER : PIO_IFDR));
> +	writel_relaxed(mask, pio + (is_on ? PIO_IFER : PIO_IFDR));
>  }
>  
>  static bool at91_mux_pio3_get_deglitch(void __iomem *pio, unsigned pin)
>  {
> -	if ((__raw_readl(pio + PIO_IFSR) >> pin) & 0x1)
> -		return !((__raw_readl(pio + PIO_IFSCSR) >> pin) & 0x1);
> +	if ((readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1)
> +		return !((readl_relaxed(pio + PIO_IFSCSR) >> pin) & 0x1);
>  
>  	return false;
>  }
> @@ -470,55 +470,55 @@ static bool at91_mux_pio3_get_deglitch(void __iomem *pio, unsigned pin)
>  static void at91_mux_pio3_set_deglitch(void __iomem *pio, unsigned mask, bool is_on)
>  {
>  	if (is_on)
> -		__raw_writel(mask, pio + PIO_IFSCDR);
> +		writel_relaxed(mask, pio + PIO_IFSCDR);
>  	at91_mux_set_deglitch(pio, mask, is_on);
>  }
>  
>  static bool at91_mux_pio3_get_debounce(void __iomem *pio, unsigned pin, u32 *div)
>  {
> -	*div = __raw_readl(pio + PIO_SCDR);
> +	*div = readl_relaxed(pio + PIO_SCDR);
>  
> -	return ((__raw_readl(pio + PIO_IFSR) >> pin) & 0x1) &&
> -	       ((__raw_readl(pio + PIO_IFSCSR) >> pin) & 0x1);
> +	return ((readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1) &&
> +	       ((readl_relaxed(pio + PIO_IFSCSR) >> pin) & 0x1);
>  }
>  
>  static void at91_mux_pio3_set_debounce(void __iomem *pio, unsigned mask,
>  				bool is_on, u32 div)
>  {
>  	if (is_on) {
> -		__raw_writel(mask, pio + PIO_IFSCER);
> -		__raw_writel(div & PIO_SCDR_DIV, pio + PIO_SCDR);
> -		__raw_writel(mask, pio + PIO_IFER);
> +		writel_relaxed(mask, pio + PIO_IFSCER);
> +		writel_relaxed(div & PIO_SCDR_DIV, pio + PIO_SCDR);
> +		writel_relaxed(mask, pio + PIO_IFER);
>  	} else
> -		__raw_writel(mask, pio + PIO_IFSCDR);
> +		writel_relaxed(mask, pio + PIO_IFSCDR);
>  }
>  
>  static bool at91_mux_pio3_get_pulldown(void __iomem *pio, unsigned pin)
>  {
> -	return !((__raw_readl(pio + PIO_PPDSR) >> pin) & 0x1);
> +	return !((readl_relaxed(pio + PIO_PPDSR) >> pin) & 0x1);
>  }
>  
>  static void at91_mux_pio3_set_pulldown(void __iomem *pio, unsigned mask, bool is_on)
>  {
>  	if (is_on)
> -		__raw_writel(mask, pio + PIO_PUDR);
> +		writel_relaxed(mask, pio + PIO_PUDR);
>  
> -	__raw_writel(mask, pio + (is_on ? PIO_PPDER : PIO_PPDDR));
> +	writel_relaxed(mask, pio + (is_on ? PIO_PPDER : PIO_PPDDR));
>  }
>  
>  static void at91_mux_pio3_disable_schmitt_trig(void __iomem *pio, unsigned mask)
>  {
> -	__raw_writel(__raw_readl(pio + PIO_SCHMITT) | mask, pio + PIO_SCHMITT);
> +	writel_relaxed(readl_relaxed(pio + PIO_SCHMITT) | mask, pio + PIO_SCHMITT);
>  }
>  
>  static bool at91_mux_pio3_get_schmitt_trig(void __iomem *pio, unsigned pin)
>  {
> -	return (__raw_readl(pio + PIO_SCHMITT) >> pin) & 0x1;
> +	return (readl_relaxed(pio + PIO_SCHMITT) >> pin) & 0x1;
>  }
>  
>  static inline u32 read_drive_strength(void __iomem *reg, unsigned pin)
>  {
> -	unsigned tmp = __raw_readl(reg);
> +	unsigned tmp = readl_relaxed(reg);
>  
>  	tmp = tmp >> two_bit_pin_value_shift_amount(pin);
>  
> @@ -554,13 +554,13 @@ static unsigned at91_mux_sam9x5_get_drivestrength(void __iomem *pio,
>  
>  static void set_drive_strength(void __iomem *reg, unsigned pin, u32 strength)
>  {
> -	unsigned tmp = __raw_readl(reg);
> +	unsigned tmp = readl_relaxed(reg);
>  	unsigned shift = two_bit_pin_value_shift_amount(pin);
>  
>  	tmp &= ~(DRIVE_STRENGTH_MASK  <<  shift);
>  	tmp |= strength << shift;
>  
> -	__raw_writel(tmp, reg);
> +	writel_relaxed(tmp, reg);
>  }
>  
>  static void at91_mux_sama5d3_set_drivestrength(void __iomem *pio, unsigned pin,
> @@ -1538,9 +1538,9 @@ void at91_pinctrl_gpio_suspend(void)
>  
>  		pio = gpio_chips[i]->regbase;
>  
> -		backups[i] = __raw_readl(pio + PIO_IMR);
> -		__raw_writel(backups[i], pio + PIO_IDR);
> -		__raw_writel(wakeups[i], pio + PIO_IER);
> +		backups[i] = readl_relaxed(pio + PIO_IMR);
> +		writel_relaxed(backups[i], pio + PIO_IDR);
> +		writel_relaxed(wakeups[i], pio + PIO_IER);
>  
>  		if (!wakeups[i])
>  			clk_disable_unprepare(gpio_chips[i]->clock);
> @@ -1565,8 +1565,8 @@ void at91_pinctrl_gpio_resume(void)
>  		if (!wakeups[i])
>  			clk_prepare_enable(gpio_chips[i]->clock);
>  
> -		__raw_writel(wakeups[i], pio + PIO_IDR);
> -		__raw_writel(backups[i], pio + PIO_IER);
> +		writel_relaxed(wakeups[i], pio + PIO_IDR);
> +		writel_relaxed(backups[i], pio + PIO_IER);
>  	}
>  }
>  
> 


-- 
Nicolas Ferre
--
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