linux-kernel - [PATCH 0/5] nvmem: support more NVMEM cells variants

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Date:   Thu, 23 Dec 2021 12:07:50 +0100
From:   Rafał Miłecki <zajec5@...il.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH 0/5] nvmem: support more NVMEM cells variants

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

Some NVMEM devices don't have NVMEM cells at hardcoded offsets and they
can't be strictly specified in a binding. Those devices usually store
NVMEM cells in some internal format. We still need a way of referencing
such hidden / dynamic NVMEM cells.

This patchset adds support for bindings like:

nvram@...f0000 {
	compatible = "brcm,nvram";
	reg = <0x1eff0000 0x10000>;

	mac_addr: cell-0 {
		label = "et0macaddr";
	};
};

ethernet@...24000 {
	compatible = "brcm,amac";
	reg = <0x18024000 0x800>;

	nvmem-cells = <&mac_addr>;
	nvmem-cell-names = "mac-address";
};

Rafał Miłecki (5):
  dt-bindings: nvmem: add "label" property to allow more flexible cells
    names
  nvmem: core: read OF defined NVMEM cell name from "label" property
  dt-bindings: nvmem: allow referencing device defined cells by names
  dt-bindings: nvmem: brcm,nvram: add NVMEM cell to example
  nvmem: core: add cell name based matching of DT cell nodes

 .../devicetree/bindings/nvmem/brcm,nvram.yaml |  8 +++--
 .../devicetree/bindings/nvmem/nvmem.yaml      | 16 +++++++--
 drivers/nvmem/core.c                          | 36 ++++++++++++++++++-
 3 files changed, 55 insertions(+), 5 deletions(-)

-- 
2.31.1