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| author | Thor Thayer <tthayer@opensource.altera.com> | 2016-10-10 09:25:25 -0500 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-10-11 12:29:04 +0200 |
| commit | 80b444e57948ea4bd5a89fb1f8c404ddab6c1973 (patch) | |
| tree | da5bdce842dda312d02453d0a7823d1759db5747 /drivers/spi/spi-dw.c | |
| parent | 6b1576aa875347c6454d911a2e001138c2cec7d5 (diff) | |
| download | linux-80b444e57948ea4bd5a89fb1f8c404ddab6c1973.tar.gz linux-80b444e57948ea4bd5a89fb1f8c404ddab6c1973.tar.bz2 linux-80b444e57948ea4bd5a89fb1f8c404ddab6c1973.zip | |
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/spi-dw.c')
| -rw-r--r-- | drivers/spi/spi-dw.c | 1 |
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); |