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

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 v2 0/5] mtd: core: OTP nvmem provider support
Date: Sat, 24 Apr 2021 13:06:03 +0200	[thread overview]
Message-ID: <20210424110608.15748-1-michael@walle.cc> (raw)

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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