| commit | 4f12b5e529e4ff274eb478ec1c2ef41358ed9577 | [log] [tgz] |
|---|---|---|
| author | Geert Uytterhoeven <geert+renesas@glider.be> | Mon Jun 02 15:38:17 2014 +0200 |
| committer | Mark Brown <broonie@linaro.org> | Mon Jun 02 15:49:35 2014 +0100 |
| tree | 20d86f05f6256125bc0004ec57da9d0be3b4cc7b | |
| parent | 03e627c55752fa434d5b3eba5ee3e489c51672b6 [diff] |
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>