From: Geert Uytterhoeven Date: Mon, 2 Jun 2014 13:38:06 +0000 (+0200) Subject: spi: rspi: Use core SPI_MASTER_MUST_[RT]X handling X-Git-Tag: omap-for-v3.16/fixes-against-rc1~39^2~29^2~1^4~13 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b42e03596db3d45980c976c8124fdc323f031dc4;p=pandora-kernel.git spi: rspi: Use core SPI_MASTER_MUST_[RT]X handling RSPI needs dummy transfers to generate the SPI clock on receive. RSPI-RZ and QSPI always do both transmit and receive. Use the SPI core SPI_MASTER_MUST_RX/SPI_MASTER_MUST_TX infrastructure instead of checking for the presence of buffers and providing dummy data ourselves (for PIO), or providing a dummy buffer (for DMA). rspi_receive_dma() now provides full duplex DMA transfers on RSPI, and is renamed to rspi_send_receive_dma(). As the SPI core will always provide a TX buffer, the logic to choose between DMA send and DMA send/receive in rspi_transfer_one() now has to check for the presence of an RX buffer. Likewise for the DMA availability tests in rspi_is_dma(). The buffer tests in qspi_transfer_one() are now always true, so they're removed. Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- Reading git-diff-tree failed