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Message-ID: <1539603969-21076-6-git-send-email-yogeshnarayan.gaur@nxp.com>
Date: Mon, 15 Oct 2018 11:48:25 +0000
From: Yogesh Narayan Gaur <yogeshnarayan.gaur@....com>
To: "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
"boris.brezillon@...tlin.com" <boris.brezillon@...tlin.com>,
"marek.vasut@...il.com" <marek.vasut@...il.com>,
"vigneshr@...com" <vigneshr@...com>,
"linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
CC: "robh@...nel.org" <robh@...nel.org>,
"mark.rutland@....com" <mark.rutland@....com>,
"shawnguo@...nel.org" <shawnguo@...nel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
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"frieder.schrempf@...eet.de" <frieder.schrempf@...eet.de>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Yogesh Narayan Gaur <yogeshnarayan.gaur@....com>
Subject: [PATCH v2 5/7] spi: spi-mem: add support for octal I/O data transfer
Add support for octal I/O data transfer in spi-mem framework.
Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@....com>
---
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 c6bdea7..6fa95f8 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
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