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authorThor Thayer <tthayer@opensource.altera.com>2016-10-10 17:25:25 +0300
committerMark Brown <broonie@kernel.org>2016-10-11 13:29:04 +0300
commit80b444e57948ea4bd5a89fb1f8c404ddab6c1973 (patch)
treeda5bdce842dda312d02453d0a7823d1759db5747 /drivers/spi
parent6b1576aa875347c6454d911a2e001138c2cec7d5 (diff)
downloadlinux-80b444e57948ea4bd5a89fb1f8c404ddab6c1973.tar.xz
spi: dw: Set GPIO_SS flag to toggle Slave Select on GPIO CS
The Designware SPI master requires slave selection before the transfer can begin [1]. This patch uses the new master flag to indicate both the GPIO CS and the internal chip select should be used. Tested On: Altera CycloneV development kit Compile tested for build errors on x86_64 (allyesconfigs) [1] DesignWare dw_apb_ssi Databook, Version 3.20a (page 39) Signed-off-by: Thor Thayer <tthayer@opensource.altera.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-dw.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index 27960e46135d..b715a26a9148 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -502,6 +502,7 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
master->handle_err = dw_spi_handle_err;
master->max_speed_hz = dws->max_freq;
master->dev.of_node = dev->of_node;
+ master->flags = SPI_MASTER_GPIO_SS;
/* Basic HW init */
spi_hw_init(dev, dws);