[PATCH v1 5/7] mtd: fsl-quadspi: get the dummy cycles for DDR Quad read from the DT property

[Huang Shijie]

Check the "spi-nor,ddr-quad-read-dummy" DT property to get the
dummy cycles for DDR quad read.

Signed-off-by: Huang Shijie <b32955 at freescale.com>
---
 drivers/mtd/spi-nor/fsl-quadspi.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c
index 8d659a2..15bdeb9 100644
--- a/drivers/mtd/spi-nor/fsl-quadspi.c
+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
@@ -883,6 +883,7 @@ static int fsl_qspi_probe(struct platform_device *pdev)
 	for_each_available_child_of_node(dev->of_node, np) {
 		const struct spi_device_id *id;
 		char modalias[40];
+		u32 dummy = 0;
 
 		/* skip the holes */
 		if (!has_second_chip)
@@ -918,6 +919,12 @@ static int fsl_qspi_probe(struct platform_device *pdev)
 		if (ret < 0)
 			goto map_failed;
 
+		/* Set the dummy cycles for the DDR Quad Read */
+		ret = of_property_read_u32(np, "spi-nor,ddr-quad-read-dummy",
+				&dummy);
+		if (!ret && dummy > 0 && dummy < 8)
+			nor->read_dummy = dummy;
+
 		/* set the chip address for READID */
 		fsl_qspi_set_base_addr(q, nor);
 
-- 
1.7.2.rc3