From: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
Date: Mon, 3 Dec 2018 08:39:12 +0000 (+0000)
Subject: spi: spi-mem: add support for octal mode I/O data transfer
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=b12a084c8729ef423089bb9a5a143eed39cd94e7;p=openwrt%2Fstaging%2Fblogic.git

spi: spi-mem: add support for octal mode I/O data transfer

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>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index 62a7b80801d2..5e15d62775e9 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;
 	}