From: marek.vasut@gmail.com (Marek Vasut)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] mtd: spi-nor: cadence-quadspi: Add DMA support for direct mode reads
Date: Tue, 10 Apr 2018 11:21:03 +0200 [thread overview]
Message-ID: <70777773-8ade-bd42-e75a-6d5d9c3e50a2@gmail.com> (raw)
In-Reply-To: <20180410081910.858-1-vigneshr@ti.com>
On 04/10/2018 10:19 AM, Vignesh R wrote:
> Add support to use DMA over memory mapped reads in direct mode. This
> helps in reducing CPU usage from ~100% to ~10% when reading data from
> flash. For non-DMA'able/vmalloc'd buffers, driver just falls back to CPU
> based memcpy.
>
> Signed-off-by: Vignesh R <vigneshr@ti.com>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
--
Best regards,
Marek Vasut
next prev parent reply other threads:[~2018-04-10 9:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-10 8:19 [PATCH] mtd: spi-nor: cadence-quadspi: Add DMA support for direct mode reads Vignesh R
2018-04-10 9:21 ` Marek Vasut [this message]
2018-04-22 17:20 ` Boris Brezillon
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