diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2014-06-02 15:38:17 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-06-02 16:49:35 +0200 |
| commit | 4f12b5e529e4ff274eb478ec1c2ef41358ed9577 (patch) | |
| tree | 20d86f05f6256125bc0004ec57da9d0be3b4cc7b /drivers/scsi/a4000t.c | |
| parent | spi: rspi: Absorb rspi_rz_transfer_out_in() into rspi_rz_transfer_one() (diff) | |
| download | linux-4f12b5e529e4ff274eb478ec1c2ef41358ed9577.tar.xz linux-4f12b5e529e4ff274eb478ec1c2ef41358ed9577.zip | |
spi: rspi: Add DMA support for QSPI on R-Car Gen2
Enable DMA support for QSPI on R-Car Gen2, for Single, Dual, and Quad SPI
Transfers.
Performance figures for reading from a QSPI FLASH driven at 24.375 MHz
on r8a7791/koelsch:
- Single: 1.1 Mbps PIO, 23 Mbps DMA
- Dual : 12.7 Mbps PIO, 48 Mbps DMA
- Quad : 13 Mbps PIO, 70 Mbps DMA
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/scsi/a4000t.c')
0 files changed, 0 insertions, 0 deletions