linux-kernel - Re: [PATCH RESEND 6/6 v13] gpio: Add block gpio to several gpio drivers

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Date:	Tue, 15 Jan 2013 14:30:55 +0100
From:	Roland Stigge <stigge@...com.de>
To:	Nicolas Ferre <nicolas.ferre@...el.com>
CC:	plagnioj@...osoft.com, gregkh@...uxfoundation.org,
	grant.likely@...retlab.ca, linus.walleij@...aro.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	w.sang@...gutronix.de, jbe@...gutronix.de, highguy@...il.com,
	broonie@...nsource.wolfsonmicro.com, daniel-gl@....net,
	rmallon@...il.com, sr@...x.de, wg@...ndegger.com,
	tru@...k-microwave.de, mark.rutland@....com
Subject: Re: [PATCH RESEND 6/6 v13] gpio: Add block gpio to several gpio drivers

On 01/15/2013 02:18 PM, Nicolas Ferre wrote:
>> --- linux-2.6.orig/drivers/pinctrl/pinctrl-at91.c
>> +++ linux-2.6/drivers/pinctrl/pinctrl-at91.c
>> @@ -49,6 +49,7 @@ struct at91_gpio_chip {
>>       struct clk        *clock;        /* associated clock */
>>       struct irq_domain    *domain;    /* associated irq domain */
>>       struct at91_pinctrl_mux_ops *ops;    /* ops */
>> +    unsigned long        mask_cache;    /* cached mask for block gpio */
>>   };
>>
>>   #define to_at91_gpio_chip(c) container_of(c, struct at91_gpio_chip,
>> chip)
>> @@ -1125,6 +1126,32 @@ static void at91_gpio_set(struct gpio_ch
>>       writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR));
>>   }
>>
>> +static unsigned long at91_gpio_get_block(struct gpio_chip *chip,
>> +                     unsigned long mask)
>> +{
>> +    struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip);
>> +    void __iomem *pio = at91_gpio->regbase;
>> +    u32 pdsr;
>> +
>> +    pdsr = __raw_readl(pio + PIO_PDSR);
> 
> Maybe you should use readl_relaxed() here as it is used in the
> at91_gpio_[get|set]() functions.

Thanks for the note! Seem to have missed this when forward porting in
pinctrl-at91.c was due.

Will include the respective change in a subsequent update.

Roland
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