* [PATCH 2/3] spi: xilinx: Add QUAD support
@ 2016-05-24 9:04 Naga Sureshkumar Relli
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From: Naga Sureshkumar Relli @ 2016-05-24 9:04 UTC (permalink / raw)
To: broonie, michal.simek, punnaia, harinik
Cc: Naga Sureshkumar Relli, linux-arm-kernel, linux-spi
This patch adds QUAD mode support to axi spi controller.
updated supported mode bits to SPI_TX_QUAD and SPI_RX_QUAD.
Signed-off-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
---
drivers/spi/spi-xilinx.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index bc12e0c..8dd4577 100644
--- a/drivers/spi/spi-xilinx.c
+++ b/drivers/spi/spi-xilinx.c
@@ -74,6 +74,7 @@
/* Number of data lines used to receive */
#define XSPI_RX_ONE_WIRE 1
+#define XSPI_RX_FOUR_WIRE 4
/**
* struct xilinx_spi - This definition define spi driver instance
@@ -558,8 +559,10 @@ static int xilinx_spi_probe(struct platform_device *pdev)
xspi->tx_fifo = xspi_fill_tx_fifo_32;
xspi->rx_fifo = xspi_read_rx_fifo_32;
}
+ } else if (xspi->rx_bus_width == XSPI_RX_FOUR_WIRE) {
+ master->mode_bits |= SPI_TX_QUAD | SPI_RX_QUAD;
} else {
- dev_err(&pdev->dev, "Dual/Quad Modes are not supported\n");
+ dev_err(&pdev->dev, "Dual Mode not supported\n");
goto put_master;
}
xspi->cs_inactive = 0xffffffff;
--
2.1.1
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