From: Michael Walle <michael@walle.cc>
To: linux-mtd@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
Rob Herring <robh+dt@kernel.org>,
Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
Michael Walle <michael@walle.cc>
Subject: [PATCH 3/5] dt-bindings: mtd: add OTP bindings
Date: Fri, 16 Apr 2021 13:49:26 +0200 [thread overview]
Message-ID: <20210416114928.27758-4-michael@walle.cc> (raw)
In-Reply-To: <20210416114928.27758-1-michael@walle.cc>
Flash devices can have one-time-programmable regions. Add a nvmem
binding so they can be used as a nvmem provider.
Signed-off-by: Michael Walle <michael@walle.cc>
---
Changes since RFC:
- added missing "$"
- dropped first example
- use real device compatibles
Please note, that this will lead to an error without patch 4/5, which
introduces that property for the jedec,spi-nor. Should I keep it
seperate or should I squash that patch into this one?
.../devicetree/bindings/mtd/mtd.yaml | 50 +++++++++++++++++++
1 file changed, 50 insertions(+)
diff --git a/Documentation/devicetree/bindings/mtd/mtd.yaml b/Documentation/devicetree/bindings/mtd/mtd.yaml
index 086b0ecd1604..dd43fb8b4fd1 100644
--- a/Documentation/devicetree/bindings/mtd/mtd.yaml
+++ b/Documentation/devicetree/bindings/mtd/mtd.yaml
@@ -21,6 +21,25 @@ properties:
based name) in order to ease flash device identification and/or
describe what they are used for.
+patternProperties:
+ "^otp(-[0-9]+)?$":
+ type: object
+ $ref: ../nvmem/nvmem.yaml#
+
+ description: |
+ An OTP memory region. Some flashes provide a one-time-programmable
+ memory whose content can either be programmed by a user or is already
+ pre-programmed by the factory. Some flashes might provide both.
+
+ properties:
+ compatible:
+ enum:
+ - mtd-user-otp
+ - mtd-factory-otp
+
+ required:
+ - compatible
+
additionalProperties: true
examples:
@@ -36,4 +55,35 @@ examples:
};
};
+ - |
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ flash@0 {
+ reg = <0>;
+ compatible = "jedec,spi-nor";
+
+ otp-1 {
+ compatible = "mtd-factory-otp";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ electronic-serial-number@0 {
+ reg = <0 8>;
+ };
+ };
+
+ otp-2 {
+ compatible = "mtd-user-otp";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ mac-address@0 {
+ reg = <0 6>;
+ };
+ };
+ };
+ };
+
...
--
2.20.1
next prev parent reply other threads:[~2021-04-16 11:49 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-16 11:49 [PATCH 0/5] mtd: core: OTP nvmem provider support Michael Walle
2021-04-16 11:49 ` [PATCH 1/5] nvmem: core: allow specifying of_node Michael Walle
2021-04-16 11:49 ` [PATCH 2/5] dt-bindings: mtd: add YAML schema for the generic MTD bindings Michael Walle
2021-04-16 11:49 ` Michael Walle [this message]
2021-04-16 18:30 ` [PATCH 3/5] dt-bindings: mtd: add OTP bindings Rob Herring
2021-04-16 18:46 ` Rob Herring
2021-04-16 11:49 ` [PATCH 4/5] dt-bindings: mtd: spi-nor: add otp property Michael Walle
2021-04-16 18:30 ` Rob Herring
2021-04-16 11:49 ` [PATCH 5/5] mtd: core: add OTP nvmem provider support Michael Walle
2021-04-16 18:44 ` [PATCH 0/5] mtd: core: " Rob Herring
2021-04-16 19:26 ` Michael Walle
2021-04-20 14:08 ` Rob Herring
2021-04-20 15:03 ` Michael Walle
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210416114928.27758-4-michael@walle.cc \
--to=michael@walle.cc \
--cc=devicetree@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mtd@lists.infradead.org \
--cc=miquel.raynal@bootlin.com \
--cc=richard@nod.at \
--cc=robh+dt@kernel.org \
--cc=srinivas.kandagatla@linaro.org \
--cc=vigneshr@ti.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).