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SubjectRe: [PATCH v3 0/5] Expose RPi4's bootloader configuration
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On 12/01/2021 14:23, Nicolas Saenz Julienne wrote:
> Soon to be released versions of RPi4's firmware will take of care
> passing their bootloader's configuration[1] to the OS by copying it into
> memory and creating a reserved memory node in the board's DT. By
> modeling this reserved memory node as an nvmem device using
> 'nvmem-rmem', which this series introduces, user-space applications will
> be able to query this information through nvmem's sysfs interface.
>
> An alternative approach, less nice IMO, would be to create a
> platform-specific 'soc' driver.
>
> Regards,
> Nicolas
>
> [1] https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2711_bootloader_config.md
>
> ---
>
> Changes since v2:
> - Fix DT bingins
>
> Changes since v1:
> - Avoid the reserved-memory indirection by integrating the nvmem driver
> into the reserved memory node.
>
> Nicolas Saenz Julienne (5):
> 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
> arm64: defconfig: Enable nvmem's rmem driver
> ARM: multi_v7_defconfig: Enable nvmem's rmem driver
>


Thanks Applied (1/5) and (2/5), rest of patches should go via arm-soc tree!

--srini

> .../devicetree/bindings/nvmem/rmem.yaml | 49 ++++++++++
> arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 17 ++++
> arch/arm/configs/multi_v7_defconfig | 1 +
> arch/arm64/configs/defconfig | 1 +
> drivers/nvmem/Kconfig | 8 ++
> drivers/nvmem/Makefile | 2 +
> drivers/nvmem/rmem.c | 97 +++++++++++++++++++
> drivers/of/platform.c | 1 +
> 8 files changed, 176 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/nvmem/rmem.yaml
> create mode 100644 drivers/nvmem/rmem.c
>

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