RPi4's co-processor will copy the board's bootloader configuration into memory for the OS to consume. Introduce a reserved-memory area template for the co-processor to edit before booting the system so as for Linux not to overwrite that memory.
Signed-off-by: Nicolas Saenz Julienne <[email protected]> --- arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts index 403bacf986eb..c58e58e8ce39 100644 --- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts +++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts @@ -25,6 +25,7 @@ aliases { emmc2bus = &emmc2bus; ethernet0 = &genet; pcie0 = &pcie0; + eeprom = &eeprom; }; leds { @@ -218,6 +219,19 @@ &pwm1 { status = "okay"; }; +&rmem { + /* + * RPi4's co-processor will copy the board's bootloader configuration + * into memory for the OS to consume. It'll also update this node with + * its placement information. + */ + eeprom: eeprom@0 { + reg = <0x0 0x0 0x0>; + no-map; + status = "disabled"; + }; +}; + /* SDHCI is used to control the SDIO for wireless */ &sdhci { #address-cells = <1>; -- 2.29.2
