linux-kernel - [PATCH v4 4/6] arm64: dts: renesas: rzg3s-smarc-som: Update dma-ranges for PCIe

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Message-ID: <20250912122444.3870284-5-claudiu.beznea.uj@bp.renesas.com>
Date: Fri, 12 Sep 2025 15:24:42 +0300
From: Claudiu <claudiu.beznea@...on.dev>
To: bhelgaas@...gle.com,
	lpieralisi@...nel.org,
	kwilczynski@...nel.org,
	mani@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	geert+renesas@...der.be,
	magnus.damm@...il.com,
	p.zabel@...gutronix.de
Cc: claudiu.beznea@...on.dev,
	linux-pci@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Claudiu Beznea <claudiu.beznea.uj@...renesas.com>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>
Subject: [PATCH v4 4/6] arm64: dts: renesas: rzg3s-smarc-som: Update dma-ranges for PCIe

From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>

The first 128MB of memory is reserved on this board for secure area.
Secure area is a RAM region used by firmware. The rzg3s-smarc-som.dtsi
memory node (memory@...00000) excludes the secure area.
Update the PCIe dma-ranges property to reflect this.

Tested-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
---

Changes in v4:
- updated the patch description with secure area meaning
- added reference clock for pcie_port0

Changes in v3:
- collected tags

Changes in v2:
- none, this patch is new


 arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
index 39845faec894..4c1bb97ac9ed 100644
--- a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
@@ -214,6 +214,16 @@ &sdhi2 {
 };
 #endif
 
+&pcie {
+	/* First 128MB is reserved for secure area. */
+	dma-ranges = <0x42000000 0 0x48000000 0 0x48000000 0x0 0x38000000>;
+};
+
+&pcie_port0 {
+	clocks = <&versa3 5>;
+	clock-names = "ref";
+};
+
 &pinctrl {
 #if SW_CONFIG3 == SW_ON
 	eth0-phy-irq-hog {
-- 
2.43.0