Commit 625227a4 authored Apr 14, 2014 by Qipan Li Committed by Mark Brown Apr 14, 2014

spi: sirf: set SPI controller in RISC IO chipselect mode



SPI bitbang supply "chipselect" interface for change chip-select line
, in the SiRFSoC SPI controller, we need to enable "SPI_CS_IO_MODE",
otherwise, spi_sirfsoc_chipselect() has no effect.
now the driver is working is because SPI controller will control CS
automatically without SPI_CS_IO_MODE. this patch makes the CS controller
really controlled by software.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

parent 818e9162

drivers/spi/spi-sirf.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -559,6 +559,11 @@ spi_sirfsoc_setup_transfer(struct spi_device spi, struct spi_transfer t)
		regval &= ~SIRFSOC_SPI_CMD_MODE;
		sspi->tx_by_cmd = false;
		}
		/*
		* set spi controller in RISC chipselect mode, we are controlling CS by
		* software BITBANG_CS_ACTIVE and BITBANG_CS_INACTIVE.
		*/
		regval \|= SIRFSOC_SPI_CS_IO_MODE;
		writel(regval, sspi->base + SIRFSOC_SPI_CTRL);

		if (IS_DMA_VALID(t)) {

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