linux-kernel - [PATCH v2 1/2] arm64: dts: verdin-imx8mp: add pcie support

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Message-Id: <20230208065947.24195-1-marcel@ziswiler.com>
Date:   Wed,  8 Feb 2023 07:59:46 +0100
From:   Marcel Ziswiler <marcel@...wiler.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Shawn Guo <shawnguo@...nel.org>,
        NXP Linux Team <linux-imx@....com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Richard Zhu <hongxing.zhu@....com>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Fabio Estevam <festevam@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/2] arm64: dts: verdin-imx8mp: add pcie support

From: Marcel Ziswiler <marcel.ziswiler@...adex.com>

Add PCIe support on the Verdin iMX8M Plus.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@...adex.com>

---
This has successfully been tested with Lucas' imx8mp-hsio-blk-ctrl high
performance PLL clock exposure patch set which meanwhile has landet in
-next. Thanks!

Changes in v2:
- Removed clocks which thanks to Lucas are now in the SoC dtsi.
- Follow recent change to not include dahlia dtsi requiring PCIe nodes
  in dev board dts as well.

 .../boot/dts/freescale/imx8mp-verdin-dahlia.dtsi  |  9 ++++++++-
 .../boot/dts/freescale/imx8mp-verdin-dev.dtsi     |  9 ++++++++-
 arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi  | 15 ++++++++++++++-
 3 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi
index 80db1ad7c230..56b0e4b865c9 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi
@@ -67,7 +67,14 @@ &i2c4 {
 	/* TODO: Audio Codec */
 };
 
-/* TODO: Verdin PCIE_1 */
+/* Verdin PCIE_1 */
+&pcie {
+	status = "okay";
+};
+
+&pcie_phy {
+	status = "okay";
+};
 
 /* Verdin PWM_1 */
 &pwm1 {
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-verdin-dev.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-verdin-dev.dtsi
index 361426c0da0a..096a6f2300f9 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-verdin-dev.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-verdin-dev.dtsi
@@ -91,7 +91,14 @@ &i2c4 {
 	/* TODO: Audio Codec */
 };
 
-/* TODO: Verdin PCIE_1 */
+/* Verdin PCIE_1 */
+&pcie {
+	status = "okay";
+};
+
+&pcie_phy {
+	status = "okay";
+};
 
 /* Verdin PWM_1 */
 &pwm1 {
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
index 6a1890a4b5d8..f0e5838665b2 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
@@ -749,7 +749,20 @@ eeprom_carrier_board: eeprom@57 {
 	};
 };
 
-/* TODO: Verdin PCIE_1 */
+/* Verdin PCIE_1 */
+&pcie {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pcie>;
+	/* PCIE_1_RESET# (SODIMM 244) */
+	reset-gpio = <&gpio4 19 GPIO_ACTIVE_LOW>;
+};
+
+&pcie_phy {
+	clocks = <&hsio_blk_ctrl>;
+	clock-names = "ref";
+	fsl,clkreq-unsupported;
+	fsl,refclk-pad-mode = <IMX8_PCIE_REFCLK_PAD_OUTPUT>;
+};
 
 /* Verdin PWM_1 */
 &pwm1 {
-- 
2.36.1