Messages in this thread | | | From | Nicolas Saenz Julienne <> | Subject | [PATCH 0/6] Expose RPi4'd bootloader configuration | Date | Tue, 15 Dec 2020 16:56:20 +0100 |
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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
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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
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