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From:   Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
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Subject: [PATCH v5 2/7] spi: spi-mem: add support for octal mode I/O data
 transfer
Thread-Topic: [PATCH v5 2/7] spi: spi-mem: add support for octal mode I/O data
 transfer
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Date:   Mon, 3 Dec 2018 08:39:12 +0000
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Add support for octal mode I/O data transfer in spi-mem framework.

Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
---
Changes for v5:
- Modified string 'octo' with 'octal'.
Changes for v4:
- None
Changes for v3:
- Modified string 'octal' with 'octo'.
Changes for v2:
- Patch added in v2 version.

 drivers/spi/spi-mem.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index 62a7b80..5e15d62 100644
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -12,7 +12,7 @@
=20
 #include "internals.h"
=20
-#define SPI_MEM_MAX_BUSWIDTH		4
+#define SPI_MEM_MAX_BUSWIDTH		8
=20
 /**
  * spi_controller_dma_map_mem_op_data() - DMA-map the buffer attached to a
@@ -121,6 +121,13 @@ static int spi_check_buswidth_req(struct spi_mem *mem,=
 u8 buswidth, bool tx)
=20
 		break;
=20
+	case 8:
+		if ((tx && (mode & SPI_TX_OCTAL)) ||
+		    (!tx && (mode & SPI_RX_OCTAL)))
+			return 0;
+
+		break;
+
 	default:
 		break;
 	}
--=20
2.7.4