linux-kernel - [RFC PATCH v1 3/3] riscv: dts: starfive: jh7110: bootph-pre-ram hinting needed by boot loader

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Message-ID: <20250102204137.423081-4-e@freeshell.de>
Date: Thu,  2 Jan 2025 12:41:23 -0800
From: E Shattow <e@...eshell.de>
To: Emil Renner Berthing <kernel@...il.dk>,
	Conor Dooley <conor@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>
Cc: linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	devicetree@...r.kernel.org,
	E Shattow <e@...eshell.de>
Subject: [RFC PATCH v1 3/3] riscv: dts: starfive: jh7110: bootph-pre-ram hinting needed by boot loader

  Add bootph-pre-ram hinting to jh7110.dtsi:
  - CPU interrupt controller(s)
  - timer
  - DRAM memory controller
  - oscillator
  - syscrg clock-controller
  - (optional) dma controller
  - (optional) aoncrg clock-controller

  With this the U-Boot SPL secondary program loader may drop such
  overrides when using dt-rebasing with JH7110 OF_UPSTREAM board targets.

Signed-off-by: E Shattow <e@...eshell.de>
---
 arch/riscv/boot/dts/starfive/jh7110.dtsi | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/riscv/boot/dts/starfive/jh7110.dtsi b/arch/riscv/boot/dts/starfive/jh7110.dtsi
index 6948974400c1..4f19b88fe73f 100644
--- a/arch/riscv/boot/dts/starfive/jh7110.dtsi
+++ b/arch/riscv/boot/dts/starfive/jh7110.dtsi
@@ -37,6 +37,7 @@ cpu0_intc: interrupt-controller {
 				compatible = "riscv,cpu-intc";
 				interrupt-controller;
 				#interrupt-cells = <1>;
+				bootph-pre-ram;
 			};
 		};
 
@@ -70,6 +71,7 @@ cpu1_intc: interrupt-controller {
 				compatible = "riscv,cpu-intc";
 				interrupt-controller;
 				#interrupt-cells = <1>;
+				bootph-pre-ram;
 			};
 		};
 
@@ -103,6 +105,7 @@ cpu2_intc: interrupt-controller {
 				compatible = "riscv,cpu-intc";
 				interrupt-controller;
 				#interrupt-cells = <1>;
+				bootph-pre-ram;
 			};
 		};
 
@@ -136,6 +139,7 @@ cpu3_intc: interrupt-controller {
 				compatible = "riscv,cpu-intc";
 				interrupt-controller;
 				#interrupt-cells = <1>;
+				bootph-pre-ram;
 			};
 		};
 
@@ -169,6 +173,7 @@ cpu4_intc: interrupt-controller {
 				compatible = "riscv,cpu-intc";
 				interrupt-controller;
 				#interrupt-cells = <1>;
+				bootph-pre-ram;
 			};
 		};
 
@@ -323,6 +328,7 @@ osc: oscillator {
 		compatible = "fixed-clock";
 		clock-output-names = "osc";
 		#clock-cells = <0>;
+		bootph-pre-ram;
 	};
 
 	rtc_osc: rtc-oscillator {
@@ -368,6 +374,7 @@ clint: timer@...0000 {
 					      <&cpu2_intc 3>, <&cpu2_intc 7>,
 					      <&cpu3_intc 3>, <&cpu3_intc 7>,
 					      <&cpu4_intc 3>, <&cpu4_intc 7>;
+			bootph-pre-ram;
 		};
 
 		ccache: cache-controller@...0000 {
@@ -382,6 +389,7 @@ ccache: cache-controller@...0000 {
 		};
 
 		dmc: dmc@...00000 {
+			bootph-pre-ram;
 			compatible = "starfive,jh7110-dmc";
 			reg = <0x0 0x15700000 0x0 0x10000>,
 			      <0x0 0x13000000 0x0 0x10000>;
@@ -916,6 +924,7 @@ syscrg: clock-controller@...20000 {
 				      "pll0_out", "pll1_out", "pll2_out";
 			#clock-cells = <1>;
 			#reset-cells = <1>;
+			bootph-pre-ram;
 		};
 
 		sys_syscon: syscon@...30000 {
@@ -1098,6 +1107,7 @@ dma: dma-controller@...50000 {
 			snps,block-size = <65536 65536 65536 65536>;
 			snps,priority = <0 1 2 3>;
 			snps,axi-max-burst-len = <16>;
+			bootph-pre-ram;
 		};
 
 		aoncrg: clock-controller@...00000 {
@@ -1115,6 +1125,7 @@ aoncrg: clock-controller@...00000 {
 				      "rtc_osc";
 			#clock-cells = <1>;
 			#reset-cells = <1>;
+			bootph-pre-ram;
 		};
 
 		aon_syscon: syscon@...10000 {
-- 
2.45.2