linux-kernel - [PATCH v2 4/5] arm64: dts: mediatek: mt7988a-bpi-r4-pro: Add PCIe overlays

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Message-ID: <20251105195007.199229-5-linux@fw-web.de>
Date: Wed,  5 Nov 2025 20:50:04 +0100
From: Frank Wunderlich <linux@...web.de>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Frank Wunderlich <frank-w@...lic-files.de>,
	Sean Wang <sean.wang@...iatek.com>,
	Daniel Golle <daniel@...rotopia.org>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-gpio@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: [PATCH v2 4/5] arm64: dts: mediatek: mt7988a-bpi-r4-pro: Add PCIe overlays

From: Frank Wunderlich <frank-w@...lic-files.de>

Add overlays to switch between key-m and key-e slots.

Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
---
 arch/arm64/boot/dts/mediatek/Makefile         |  2 ++
 .../mt7988a-bananapi-bpi-r4-pro-cn15.dtso     | 20 +++++++++++++++++++
 .../mt7988a-bananapi-bpi-r4-pro-cn18.dtso     | 20 +++++++++++++++++++
 3 files changed, 42 insertions(+)
 create mode 100644 arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4-pro-cn15.dtso
 create mode 100644 arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4-pro-cn18.dtso

diff --git a/arch/arm64/boot/dts/mediatek/Makefile b/arch/arm64/boot/dts/mediatek/Makefile
index 8640e5f32d4b..8e99f6e33b25 100644
--- a/arch/arm64/boot/dts/mediatek/Makefile
+++ b/arch/arm64/boot/dts/mediatek/Makefile
@@ -26,6 +26,8 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += mt7988a-bananapi-bpi-r4-2g5.dtb
 dtb-$(CONFIG_ARCH_MEDIATEK) += mt7988a-bananapi-bpi-r4-emmc.dtbo
 dtb-$(CONFIG_ARCH_MEDIATEK) += mt7988a-bananapi-bpi-r4-pro-4e.dtb
 dtb-$(CONFIG_ARCH_MEDIATEK) += mt7988a-bananapi-bpi-r4-pro-8x.dtb
+dtb-$(CONFIG_ARCH_MEDIATEK) += mt7988a-bananapi-bpi-r4-pro-cn15.dtbo
+dtb-$(CONFIG_ARCH_MEDIATEK) += mt7988a-bananapi-bpi-r4-pro-cn18.dtbo
 dtb-$(CONFIG_ARCH_MEDIATEK) += mt7988a-bananapi-bpi-r4-sd.dtbo
 dtb-$(CONFIG_ARCH_MEDIATEK) += mt8167-pumpkin.dtb
 dtb-$(CONFIG_ARCH_MEDIATEK) += mt8173-elm.dtb
diff --git a/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4-pro-cn15.dtso b/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4-pro-cn15.dtso
new file mode 100644
index 000000000000..9750916042de
--- /dev/null
+++ b/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4-pro-cn15.dtso
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2025 MediaTek Inc.
+ * Author: Frank Wunderlich <frank-w@...lic-files.de>
+ */
+
+/* This enables key-b slot CN15 on pcie2(11280000 1L0) on BPI-R4-Pro */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	compatible = "bananapi,bpi-r4-pro", "mediatek,mt7988a";
+};
+
+&{/soc/pinctrl@...1f000/pcie-2-hog} {
+	output-low;
+};
diff --git a/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4-pro-cn18.dtso b/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4-pro-cn18.dtso
new file mode 100644
index 000000000000..9830fb0fd97a
--- /dev/null
+++ b/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4-pro-cn18.dtso
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2025 MediaTek Inc.
+ * Author: Frank Wunderlich <frank-w@...lic-files.de>
+ */
+
+/* This enables key-b slot CN18 on pcie3(11290000 1L1) on BPI-R4-Pro */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	compatible = "bananapi,bpi-r4-pro", "mediatek,mt7988a";
+};
+
+&{/soc/pinctrl@...1f000/pcie-3-hog} {
+	output-low;
+};
-- 
2.43.0