linux-kernel - [PATCH 0/6] Expose RPi4'd bootloader configuration

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Date:   Tue, 15 Dec 2020 16:56:20 +0100
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     srinivas.kandagatla@...aro.org,
        Saenz Julienne <nsaenzjulienne@...e.de>,
        devicetree@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, linux@...linux.org.uk,
        catalin.marinas@....com, will@...nel.org, robh+dt@...nel.org,
        tim.gover@...pberrypi.com, phil@...pberrypi.com
Subject: [PATCH 0/6] Expose RPi4'd bootloader configuration

Soon to be released versions of RPi4's firmware will take of care
passing their bootloader's configuration to the OS by copying it into
memory and creating a reserved memory node in the board's DT. In order
to make use of this information, this series introduces a new generic
nvmem driver that maps reserved-memory nodes into nvmem devices.

An alternative approach, less nice IMO, would be to create a
platform-specific 'soc' driver.

Regards,
Nicolas

---

Nicolas Saenz Julienne (6):
  dt-bindings: nvmem: Add bindings for rmem driver
  nvmem: Add driver to expose reserved memory as nvmem
  ARM: dts: bcm2711: Add reserved memory template to hold firmware
    configuration
  ARM: dts: bcm2711: Expose boot-loader configuration
  arm64: defconfig: Enable nvmem's rmem driver
  ARM: multi_v7_defconfig: Enable nvmem's rmem driver

 .../devicetree/bindings/nvmem/rmem.yaml       | 35 +++++++
 arch/arm/boot/dts/bcm2711-rpi-4-b.dts         | 25 +++++
 arch/arm/configs/multi_v7_defconfig           |  1 +
 arch/arm64/configs/defconfig                  |  1 +
 drivers/nvmem/Kconfig                         |  8 ++
 drivers/nvmem/Makefile                        |  2 +
 drivers/nvmem/rmem.c                          | 92 +++++++++++++++++++
 7 files changed, 164 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/rmem.yaml
 create mode 100644 drivers/nvmem/rmem.c

-- 
2.29.2