From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5] spi: spi-imx: add DMA support
Date: Wed, 10 Sep 2014 10:17:14 +0200 [thread overview]
Message-ID: <5412055.BAOgFikuh9@wuerfel> (raw)
In-Reply-To: <1410312604-31949-1-git-send-email-b38343@freescale.com>
On Wednesday 10 September 2014 09:30:04 Robin Gong wrote:
> Enable DMA support on i.mx6. The read speed can increase from 600KB/s
> to 1.2MB/s on i.mx6q. You can disable or enable dma function in dts.
> If not set "dma-names" in dts, spi will use PIO mode. This patch only
> validate on i.mx6, not i.mx5, but encourage ones to apply this patch
> on i.mx5 since they share the same IP.
>
> Note:
> Sometime, there is a weid data in rxfifo after one full tx/rx
> transfer finish by DMA on i.mx6dl, so we disable dma functhion on
> i.mx6dl.
>
> Signed-off-by: Frank Li <Frank.Li@freescale.com>
> Signed-off-by: Robin Gong <b38343@freescale.com>
>
>
The patch looks good to me, but you need to also update the
Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt file to
document the additional optional properties.
Arnd
next prev parent reply other threads:[~2014-09-10 8:17 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-10 1:30 [PATCH v5] spi: spi-imx: add DMA support Robin Gong
2014-09-10 4:16 ` Varka Bhadram
2014-09-10 5:46 ` Robin Gong
2014-09-10 8:17 ` Arnd Bergmann [this message]
2014-09-10 8:28 ` Robin Gong
2014-09-10 10:21 ` Mark Brown
2014-09-10 11:22 ` Robin Gong
2014-09-10 11:45 ` Mark Brown
2014-09-10 15:18 ` Robin Gong
2014-09-10 15:52 ` Mark Brown
2014-09-11 1:37 ` Robin Gong
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