linux-kernel - [PATCH v3 02/12] spi: atmel-quadspi: reject DTR ops

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Message-ID: <20200313154645.29293-3-p.yadav@ti.com>
Date:   Fri, 13 Mar 2020 21:16:35 +0530
From:   Pratyush Yadav <p.yadav@...com>
To:     Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Mark Brown <broonie@...nel.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>
CC:     Pratyush Yadav <p.yadav@...com>, <linux-mtd@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-spi@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Sekhar Nori <nsekhar@...com>
Subject: [PATCH v3 02/12] spi: atmel-quadspi: reject DTR ops

Double Transfer Rate (DTR) ops are added in spi-mem. But this controller
doesn't support DTR transactions. Since we don't use the default
supports_op(), which rejects all DTR ops, do that explicitly in our
supports_op().

Signed-off-by: Pratyush Yadav <p.yadav@...com>
---
 drivers/spi/atmel-quadspi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/spi/atmel-quadspi.c b/drivers/spi/atmel-quadspi.c
index 13def7f78b9e..91c1515ea72a 100644
--- a/drivers/spi/atmel-quadspi.c
+++ b/drivers/spi/atmel-quadspi.c
@@ -210,6 +210,10 @@ static bool atmel_qspi_supports_op(struct spi_mem *mem,
 		op->dummy.nbytes == 0)
 		return false;
 
+	/* DTR ops not supported. */
+	if (op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr)
+		return false;
+
 	return true;
 }
 
-- 
2.25.0