linux-kernel - [PATCH v2 0/5] mtd: core: OTP nvmem provider support

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Message-Id: <20210424110608.15748-1-michael@walle.cc>
Date:   Sat, 24 Apr 2021 13:06:03 +0200
From:   Michael Walle <michael@...le.cc>
To:     linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Michael Walle <michael@...le.cc>
Subject: [PATCH v2 0/5] mtd: core: OTP nvmem provider support

Some flashes provide one (or more) OTP regions which can be used to
store MAC addresses or serial numbers. Implement a NVMEM provider for
this storage which then can be used by a network card to fetch the
MAC adress for example.

This is an example DT node:

flash@0 {
    otp {
        compatible = "user-otp";
        #address-cells = <1>;
        #size-cells = <1>;

        serial-number@0 {
            reg = <0x0 0x8>;
        };
    };
};

Michael Walle (5):
  nvmem: core: allow specifying of_node
  dt-bindings: mtd: add YAML schema for the generic MTD bindings
  dt-bindings: mtd: add OTP bindings
  dt-bindings: mtd: spi-nor: add otp property
  mtd: core: add OTP nvmem provider support

 .../devicetree/bindings/mtd/common.txt        |  16 +-
 .../bindings/mtd/jedec,spi-nor.yaml           |   6 +
 .../devicetree/bindings/mtd/mtd.yaml          |  89 +++++++++++
 drivers/mtd/mtdcore.c                         | 148 ++++++++++++++++++
 drivers/nvmem/core.c                          |   4 +-
 include/linux/mtd/mtd.h                       |   2 +
 include/linux/nvmem-provider.h                |   2 +
 7 files changed, 251 insertions(+), 16 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mtd/mtd.yaml

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2.20.1