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Date: Tue, 21 Oct 2014 18:03:24 +0800
From: Josh Wu <josh.wu@atmel.com>
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To: Vinod Koul <vinod.koul@intel.com>, <linux-mtd@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>
CC: David Woodhouse <dwmw2@infradead.org>,
        Brian Norris <computersforpeace@gmail.com>,
        Jingoo Han <jg1.han@samsung.com>,
        "Ezequiel Garcia" <ezequiel.garcia@free-electrons.com>,
        Mark Brown <broonie@linaro.org>,
        Nicolas Ferre <nicolas.ferre@atmel.com>,
        "Bartlomiej Zolnierkiewicz" <b.zolnierkie@samsung.com>,
        Herve Codina <Herve.CODINA@celad.com>, Bo Shen <voice.shen@atmel.com>,
        Fabio Estevam <fabio.estevam@freescale.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Michael Grzeschik <m.grzeschik@pengutronix.de>,
        Josh Triplett <josh@joshtriplett.org>,
        Wei Yongjun <yongjun_wei@trendmicro.com.cn>,
        "Huang Shijie" <shijie8@gmail.com>,
        Michael Opdenacker <michael.opdenacker@free-electrons.com>
Subject: Re: [PATCH 1/2] mtd: atmel_nand: use __iowrite32_copy for 32 bit
 copy
References: <1413821173-18347-1-git-send-email-vinod.koul@intel.com>
In-Reply-To: <1413821173-18347-1-git-send-email-vinod.koul@intel.com>
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Hi, Vinod

On 10/21/2014 12:06 AM, Vinod Koul wrote:
> The driver was also using own method to do 32bit copy, turns out
> we have a kernel API so use that instead
>
> Signed-off-by: Vinod Koul <vinod.koul@intel.com>

Thanks for the patch.
Acked-by: Josh Wu <josh.wu@atmel.com>

BTW, is there any similar kernel API that is for the read from io?

Best Regards,
Josh Wu

> ---
>   drivers/mtd/nand/atmel_nand.c |   10 +++-------
>   1 files changed, 3 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
> index e321c56..b03e80d 100644
> --- a/drivers/mtd/nand/atmel_nand.c
> +++ b/drivers/mtd/nand/atmel_nand.c
> @@ -265,14 +265,10 @@ static void memcpy32_fromio(void *trg, const void __iomem  *src, size_t size)
>   		*t++ = readl_relaxed(s++);
>   }
>   
> -static void memcpy32_toio(void __iomem *trg, const void *src, int size)
> +static inline void memcpy32_toio(void __iomem *trg, const void *src, int size)
>   {
> -	int i;
> -	u32 __iomem *t = trg;
> -	const u32 *s = src;
> -
> -	for (i = 0; i < (size >> 2); i++)
> -		writel_relaxed(*s++, t++);
> +	/* __iowrite32_copy use 32bit size values so divide by 4 */
> +	__iowrite32_copy(trg, src, size/4);
>   }
>   
>   /*