From: Mason Yang <masonccyang@mxic.com.tw>
To: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com,
robh+dt@kernel.org, mark.rutland@arm.com
Cc: devicetree@vger.kernel.org, tglx@linutronix.de,
juliensu@mxic.com.tw, frieder.schrempf@kontron.de,
allison@lohutok.net, linux-kernel@vger.kernel.org,
linux-mtd@lists.infradead.org, yuehaibing@huawei.com,
Mason Yang <masonccyang@mxic.com.tw>
Subject: [PATCH v5 2/2] dt-bindings: mtd: Document Macronix NAND device bindings
Date: Mon, 17 Feb 2020 14:56:40 +0800 [thread overview]
Message-ID: <1581922600-25461-3-git-send-email-masonccyang@mxic.com.tw> (raw)
In-Reply-To: <1581922600-25461-1-git-send-email-masonccyang@mxic.com.tw>
Document the bindings used by the Macronix NAND device.
Signed-off-by: Mason Yang <masonccyang@mxic.com.tw>
Reviewed-by: Rob Herring <robh@kernel.org>
---
.../devicetree/bindings/mtd/nand-macronix.txt | 28 ++++++++++++++++++++++
1 file changed, 28 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mtd/nand-macronix.txt
diff --git a/Documentation/devicetree/bindings/mtd/nand-macronix.txt b/Documentation/devicetree/bindings/mtd/nand-macronix.txt
new file mode 100644
index 0000000..1d7a895
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/nand-macronix.txt
@@ -0,0 +1,28 @@
+Macronix NANDs Device Tree Bindings
+-----------------------------------
+
+Macronix NANDs support randomizer operation for user data scrambled,
+which can be enabled with a SET_FEATURE. The penalty of randomizer are
+subpage accesses prohibited and more time period is needed in program
+operation, i.e., tPROG 300us to 340us(randomizer enabled).
+Randomizer enabled is a one time persistent and non reversible operatoin.
+
+For more high-reliability concern, if subpage write not available with
+hardware ECC and filesystem and then to enable randomizer is recommended
+by default.
+
+By adding a new specific property in children nodes to enable
+randomizer function.
+
+Required NAND chip properties in children mode:
+- randomizer enable: should be "mxic,enable-randomizer-otp"
+
+Example:
+
+ nand: nand-controller@unit-address {
+
+ nand@0 {
+ reg = <0>;
+ mxic,enable-randomizer-otp;
+ };
+ };
--
1.9.1
next prev parent reply other threads:[~2020-02-17 6:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-17 6:56 [PATCH v5 0/2] mtd: rawnand: Add support for Macronix NAND randomizer Mason Yang
2020-02-17 6:56 ` [PATCH v5 1/2] " Mason Yang
2020-03-10 18:32 ` Miquel Raynal
2020-02-17 6:56 ` Mason Yang [this message]
2020-03-10 18:31 ` [PATCH v5 2/2] dt-bindings: mtd: Document Macronix NAND device bindings Miquel Raynal
2020-03-11 7:45 ` Miquel Raynal
2020-03-12 1:55 ` masonccyang
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