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spi: sirf: reset SPI controller in init stage 

in SPI boot mode, romcode uses SPI controller to fetch data from NOR
flash. Here we need to reset the hardware IP to restore its state.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Qipan Li 2014-11-20 22:33:07 +08:00 committed by Mark Brown
parent fcc50e5cd2
commit 8509c55fcb
1 changed files with 7 additions and 0 deletions
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7
drivers/spi/spi-sirf.c
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@ -23,6 +23,7 @@
#include <linux/dmaengine.h>
#include <linux/dma-direction.h>
#include <linux/dma-mapping.h>
#include <linux/reset.h>
#define DRIVER_NAME "sirfsoc_spi"
@ -647,6 +648,12 @@ static int spi_sirfsoc_probe(struct platform_device *pdev)
int irq;
int i, ret;
ret = device_reset(&pdev->dev);
if (ret) {
dev_err(&pdev->dev, "SPI reset failed!\n");
return ret;
}
master = spi_alloc_master(&pdev->dev, sizeof(*sspi));
if (!master) {
dev_err(&pdev->dev, "Unable to allocate SPI master\n");