linux-kernel - [PATCH RFT 10/10] arm64: dts: microchip: sparx5

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Date: Mon,  1 Apr 2024 17:37:40 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Conor Dooley <conor@...nel.org>,
	Nicolas Ferre <nicolas.ferre@...rochip.com>,
	Claudiu Beznea <claudiu.beznea@...on.dev>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Lars Povlsen <lars.povlsen@...rochip.com>,
	Steen Hegelund <Steen.Hegelund@...rochip.com>,
	Daniel Machon <daniel.machon@...rochip.com>,
	UNGLinuxDriver@...rochip.com,
	"David S. Miller" <davem@...emloft.net>,
	Bjarni Jonasson <bjarni.jonasson@...rochip.com>,
	linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Krzysztof Kozlowski <krzk@...nel.org>
Subject: [PATCH RFT 10/10] arm64: dts: microchip: sparx5_pcb135: drop duplicated NOR flash

Since beginning the DTS extended the SPI0 in two places adding two SPI
muxes, each with same SPI NOR flash.  Both used exactly the same
chip-selects, so this was clearly buggy code.  Without checking in
datasheet, assume device has only one SPI NOR flash, so code was
duplicated.

Fixes dtc W=1 warnings:

  sparx5_pcb135_board.dtsi:92.10-96.4: Warning (unique_unit_address_if_enabled): /axi@...000000/spi@...104000/flash@0: duplicate unit-address (also used in node /axi@...000000/spi@...104000/spi@0)

Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>

---

Not tested on hardware
---
 .../boot/dts/microchip/sparx5_pcb135_board.dtsi  | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/arch/arm64/boot/dts/microchip/sparx5_pcb135_board.dtsi b/arch/arm64/boot/dts/microchip/sparx5_pcb135_board.dtsi
index 20016efb3656..d64e642e3873 100644
--- a/arch/arm64/boot/dts/microchip/sparx5_pcb135_board.dtsi
+++ b/arch/arm64/boot/dts/microchip/sparx5_pcb135_board.dtsi
@@ -96,22 +96,6 @@ flash@0 {
 	};
 };
 
-&spi0 {
-	status = "okay";
-	spi@0 {
-		compatible = "spi-mux";
-		mux-controls = <&mux>;
-		#address-cells = <1>;
-		#size-cells = <0>;
-		reg = <0>; /* CS0 */
-		flash@9 {
-			compatible = "jedec,spi-nor";
-			spi-max-frequency = <8000000>;
-			reg = <0x9>; /* SPI */
-		};
-	};
-};
-
 &sgpio1 {
 	status = "okay";
 	microchip,sgpio-port-ranges = <24 31>;
-- 
2.34.1