linux-kernel - [PATCH V3 0/2] nvmem: add and use generic MMIO NVMEM

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Message-Id: <20230220174930.7440-1-zajec5@gmail.com>
Date:   Mon, 20 Feb 2023 18:49:28 +0100
From:   Rafał Miłecki <zajec5@...il.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH V3 0/2] nvmem: add and use generic MMIO NVMEM

From: Rafał Miłecki <rafal@...ecki.pl>

MMIO accessible NVMEM devices should be simple enough to allow using a
single binding & driver for them.

In V3 I didn't decide to modify existing Mediatek & UniPhier drivers as
there are some concerns about adding writing support to them. If needed
that can be done later.

I decided to support Broadcom's NVRAM with generic driver though. That
is my main goal right now. To let generic code handle NVRAM access and
let NVRAM specific driver handle its content. That way it can be reused
for other NVMEM devices later (once we get layouts support).

Rafał Miłecki (2):
  dt-bindings: nvmem: mmio: new binding for MMIO accessible NVMEM
    devices
  nvmem: add generic driver for devices with MMIO access

 .../devicetree/bindings/nvmem/mmio.yaml       |  50 +++++++
 drivers/nvmem/Kconfig                         |  10 ++
 drivers/nvmem/Makefile                        |   2 +
 drivers/nvmem/mmio.c                          | 125 ++++++++++++++++++
 4 files changed, 187 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/mmio.yaml
 create mode 100644 drivers/nvmem/mmio.c

-- 
2.34.1