From: Jiada Wang <jiada_wang@mentor.com>
To: <broonie@kernel.org>
Cc: <linux-spi@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<fixed-term.Oleksij.Rempel@de.bosch.com>, <jiada_wang@mentor.com>
Subject: [PATCH linux-next v1 0/2] improve imx spi performance
Date: Wed, 8 Feb 2017 15:20:26 +0900 [thread overview]
Message-ID: <20170208062028.22313-1-jiada_wang@mentor.com> (raw)
previously burst length (BURST_LENGTH) is always set to equal
to bits_per_word, causes a 10us gap between each word in transfer,
which significantly affects performance.
This patch set uses 32 bits tranfser to simulate lowers bits transfer,
and by set burst length to maximum possible value to reduce number of gaps
in both PIO & DMA transfers.
* This patch set is against linux-next tree
Jiada Wang (2):
spi: imx: dynamic burst length adjust for PIO mode
spi: imx: dynamic burst length adjust for DMA mode
drivers/spi/spi-imx.c | 293 +++++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 267 insertions(+), 26 deletions(-)
--
2.9.3
next reply other threads:[~2017-02-08 6:20 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-08 6:20 Jiada Wang [this message]
2017-02-08 6:20 ` [PATCH 1/2] spi: imx: dynamic burst length adjust for PIO mode Jiada Wang
2017-02-14 18:20 ` Mark Brown
2017-05-01 10:15 ` Jiada Wang
2017-02-08 6:20 ` [PATCH 2/2] spi: imx: dynamic burst length adjust for DMA mode Jiada Wang
2017-02-08 8:46 ` kbuild test robot
2017-02-08 10:59 ` kbuild test robot
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