linux-kernel - [PATCH 2/3] mtd: davinci-nand: add dts property for NAND_NO_SUBPAGE

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Message-ID: <1395335184-4745-3-git-send-email-ivan.khoronzhuk@ti.com>
Date:	Thu, 20 Mar 2014 19:06:23 +0200
From:	Ivan Khoronzhuk <ivan.khoronzhuk@...com>
To:	<dwmw2@...radead.org>, <computersforpeace@...il.com>,
	<galak@...eaurora.org>, <santosh.shilimkar@...com>
CC:	<robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <rob@...dley.net>,
	<linux@....linux.org.uk>, <grygorii.strashko@...com>,
	<devicetree@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-mtd@...ts.infradead.org>,
	Murali Karicheri <m-karicheri2@...com>,
	Ivan Khoronzhuk <ivan.khoronzhuk@...com>
Subject: [PATCH 2/3] mtd: davinci-nand: add dts property for NAND_NO_SUBPAGE_WRITE option

From: Murali Karicheri <m-karicheri2@...com>

After testing NAND flash with ubifs for k2hk-emv board were committed
that flash doesn't support subpage writing, so we can fix it by
adding a property to disable subpage write.

Signed-off-by: Murali Karicheri <m-karicheri2@...com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@...com>
---
 Documentation/devicetree/bindings/mtd/davinci-nand.txt | 2 ++
 drivers/mtd/nand/davinci_nand.c                        | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/davinci-nand.txt b/Documentation/devicetree/bindings/mtd/davinci-nand.txt
index cfb18ab..50af930 100644
--- a/Documentation/devicetree/bindings/mtd/davinci-nand.txt
+++ b/Documentation/devicetree/bindings/mtd/davinci-nand.txt
@@ -53,6 +53,8 @@ Recommended properties :
 				identifier is saved in OOB area. If not present
 				false.
 
+- ti,davinci-nosubpage-write:	disable subpage write for the device
+
 Deprecated properties:
 
 - ti,davinci-ecc-mode:		operation mode of the NAND ecc mode. ECC mode
diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c
index 4615d79..3ba058d 100644
--- a/drivers/mtd/nand/davinci_nand.c
+++ b/drivers/mtd/nand/davinci_nand.c
@@ -581,6 +581,9 @@ static struct davinci_nand_pdata
 		    of_property_read_bool(pdev->dev.of_node,
 			"ti,davinci-nand-use-bbt"))
 			pdata->bbt_options = NAND_BBT_USE_FLASH;
+		if (of_property_read_bool(pdev->dev.of_node,
+			"ti,davinci-no-subpage-write"))
+			pdata->options |= NAND_NO_SUBPAGE_WRITE;
 	}
 
 	return dev_get_platdata(&pdev->dev);
-- 
1.8.3.2

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