[PATCH v5 2/7] spi: spi-mem: add support for octal mode I/O data transfer

Yogesh Narayan Gaur
2018-12-03T08:39:35Z

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 @@

#include "internals.h"

-#define SPI_MEM_MAX_BUSWIDTH 4
+#define SPI_MEM_MAX_BUSWIDTH 8

/**
* 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)

break;

+ case 8:
+ if ((tx && (mode & SPI_TX_OCTAL)) ||
+ (!tx && (mode & SPI_RX_OCTAL)))
+ return 0;
+
+ break;
+
default:
break;
}
--
2.7.4