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(parent: b482605) | patch
spi: spi-ti-qspi: Add DMA support for QSPI mmap read
authorVignesh R <vigneshr@ti.com>
Wed, 17 Aug 2016 09:52:37 +0000 (15:22 +0530)
committerMark Brown <broonie@kernel.org>
Wed, 17 Aug 2016 11:24:28 +0000 (12:24 +0100)
commitfb75eaa41cdad16bfb04c2c892dfbdbcb3519c36
treeb1f3ac74bd8391060ddc2cfd599fd68e252484b3tree | snapshot
parentb482605f7939bd4035b2d11a7952dc3da5821c6dcommit | diff
spi: spi-ti-qspi: Add DMA support for QSPI mmap read

Use mem-to-mem DMA to read from flash when reading in mmap mode. This
gives improved read performance and reduces CPU load.

With this patch the raw-read throughput is ~16MB/s on DRA74 EVM. And CPU
load is <20%. UBIFS read throughput ~13 MB/s.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
drivers/spi/spi-ti-qspi.c diff | blob | history
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