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