linux-kernel - [PATCH] mtd: nand: brcmnand: Set appropriate DMA mask

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Message-Id: <20191218005635.31636-1-f.fainelli@gmail.com>
Date:   Tue, 17 Dec 2019 16:56:35 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     linux-mtd@...ts.infradead.org
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Brian Norris <computersforpeace@...il.com>,
        Kamal Dasu <kdasu.kdev@...il.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        bcm-kernel-feedback-list@...adcom.com (open list:BROADCOM STB NAND
        FLASH DRIVER), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] mtd: nand: brcmnand: Set appropriate DMA mask

NAND controllers >= 7.0 with FLASH_DMA support physical addresses up to
40-bit, set an appropriate DMA mask for that purpose.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/mtd/nand/raw/brcmnand/brcmnand.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
index 1a66b1cd51c0..44518dada75b 100644
--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
@@ -2635,6 +2635,16 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc)
 		/* initialize the dma version */
 		brcmnand_flash_dma_revision_init(ctrl);
 
+		ret = -EIO;
+		if (ctrl->nand_version >= 0x0700)
+			ret = dma_set_mask_and_coherent(&pdev->dev,
+							DMA_BIT_MASK(40));
+		if (ret)
+			ret = dma_set_mask_and_coherent(&pdev->dev,
+							DMA_BIT_MASK(32));
+		if (ret)
+			goto err;
+
 		/* linked-list and stop on error */
 		flash_dma_writel(ctrl, FLASH_DMA_MODE, FLASH_DMA_MODE_MASK);
 		flash_dma_writel(ctrl, FLASH_DMA_ERROR_STATUS, 0);
-- 
2.17.1