linux-kernel - [PATCH v2 0/3] Read MAC Address from SST vendor specific SFDP region

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Message-ID: <20250326072140.172244-1-manikandan.m@microchip.com>
Date: Wed, 26 Mar 2025 12:51:37 +0530
From: Manikandan Muralidharan <manikandan.m@...rochip.com>
To: <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
	<nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
	<claudiu.beznea@...on.dev>, <tudor.ambarus@...aro.org>,
	<pratyush@...nel.org>, <mwalle@...nel.org>, <miquel.raynal@...tlin.com>,
	<richard@....at>, <vigneshr@...com>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<linux-mtd@...ts.infradead.org>
CC: <manikandan.m@...rochip.com>
Subject: [PATCH v2 0/3] Read MAC Address from SST vendor specific SFDP region

This patch series adds support to parse the SFDP SST vendor map, read and
store the EUI-48 and EUI-64 Address (if its programmed) using the
resource-managed devm_kcalloc which will be freed on driver detach.
Register EUI addresses into NVMEM framework for the net drivers to access
them using nvmem properties.
This change ensures consistent and reliable MAC address retrieval
from QSPI benefiting boards like the sama5d29 curiosity and
sam9x75 curiosity.

--------
changes in v2:

- 1/3 - parse the SST vendor table, read and store the addresses
	into a resource - managed space. Register the addresses
	into NVMEM framework
- 2/3 - add support to update the QSPI partition into 'fixed-partition'
	binding
--------

Manikandan Muralidharan (3):
  mtd: spi-nor: sfdp: parse SFDP SST vendor map and register EUI
    addresses into NVMEM framework
  ARM: dts: microchip: sama5d29_curiosity: update the QSPI partitions
    using "fixed-partition" binding
  ARM: dts: microchip: sama5d29_curiosity: Add nvmem-layout in QSPI for
    EUI48 MAC Address

 .../dts/microchip/at91-sama5d29_curiosity.dts |  62 ++++---
 drivers/mtd/spi-nor/sfdp.c                    | 161 ++++++++++++++++++
 include/linux/mtd/spi-nor.h                   |   7 +
 3 files changed, 206 insertions(+), 24 deletions(-)

-- 
2.25.1