[PATCH 5/5] arm64: dts: rockchip: name the reboot mode supplies on RK3576 EVB1

[Alexey Charkov]

A reset that carries a boot mode request has to leave the mode register
intact, so it also leaves the regulators as the running system left
them. The DDR firmware that runs next configures bus QoS in the
interconnect, in CCI_GRF, DDR_GRF and NPU_GRF, and faults if a supply
behind any of those is down. The NPU rail is the one most easily left
unpowered, as nothing else on the board needs it.

Name every supply those blocks sit behind, so that requesting a boot
mode powers them regardless of what the running system happened to keep
enabled.

Signed-off-by: Alexey Charkov <alchark at flipper.net>
---
 arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts b/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
index 4c82980a9f63..55951f290906 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
@@ -957,6 +957,22 @@ wifi_wake_host: wifi-wake-host {
 	};
 };
 
+&reboot_mode {
+	/*
+	 * A reset that carries a boot mode request leaves the regulators as
+	 * the running system left them, while the DDR firmware that runs next
+	 * configures bus QoS in the interconnect, CCI_GRF, DDR_GRF and
+	 * NPU_GRF, and it runs into a synchronous abort if any of the blocks
+	 * is unpowered when it accesses them.
+	 */
+	ddr-supply = <&vdd_ddr_s0>;
+	ddr2-supply = <&vdd2_ddr_s3>;
+	ddr-pll-supply = <&vdda_ddr_pll_s0>;
+	ddrq-supply = <&vddq_ddr_s0>;
+	logic-supply = <&vdd_logic_s0>;
+	npu-supply = <&vdd_npu_s0>;
+};
+
 &sai1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&sai1m0_lrck

-- 
2.55.0