From: Geert Uytterhoeven Date: Mon, 2 Jun 2014 13:38:11 +0000 (+0200) Subject: spi: rspi: SPI DMA core needs both RX and TX DMA to function X-Git-Tag: omap-for-v3.16/fixes-against-rc1~39^2~29^2~1^4~8 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5f338d0ce0b4c9e6c554b92cfb288789a41bfbc1;p=pandora-kernel.git spi: rspi: SPI DMA core needs both RX and TX DMA to function The SPI DMA core framework needs both RX and TX DMA to function. As a preparation for converting the driver to use this framework, fall back to PIO if no DMA channel or only one DMA channel is available. This affects only RSPI, which could do DMA transfers for TX-only before. RSPI-RZ and QSPI (at least for Single SPI Transfers) will need both RX and TX DMA anyway. Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- Reading git-diff-tree failed