[PATCH] spi: sirf: reset SPI controller in init stage

[Barry Song <21cnbao@xxxxxxxxx>]

From: Qipan Li <Qipan.Li@xxxxxxx>

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@xxxxxxx>
Signed-off-by: Barry Song <Baohua.Song@xxxxxxx>
---
 drivers/spi/spi-sirf.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c
index 90dc05b..73a88b3 100644
--- a/drivers/spi/spi-sirf.c
+++ b/drivers/spi/spi-sirf.c
@@ -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");
-- 
2.1.1

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