linux-kernel - [PATCH V2 7/7] arm64: dts: imx8mm: Add PCIe support

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Date:   Fri, 13 Dec 2019 10:05:42 -0600
From:   Adam Ford <aford173@...il.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     peng.fan@....com, ping.bai@....com, Adam Ford <aford173@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH V2 7/7] arm64: dts: imx8mm: Add PCIe support

The PCIE controller on the i.MX8M Mini appears to be the same
as the i.MX8MQ but it is absent.

This patch uses the bindings from the i.MX8MQ and the clock
information from the NXP Linux release and marks it as disabled
so it can be configured and enabled on boards where needed.

Signed-off-by: Adam Ford <aford173@...il.com>
---
V2:  No Change

 arch/arm64/boot/dts/freescale/imx8mm.dtsi | 35 +++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index dbeee4059c55..33fa760a3f2e 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -5,6 +5,7 @@
 
 #include <dt-bindings/clock/imx8mm-clock.h>
 #include <dt-bindings/power/imx8m-power.h>
+#include <dt-bindings/reset/imx8mq-reset.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
@@ -934,6 +935,40 @@
 			status = "disabled";
 		};
 
+		pcie0: pcie@...00000 {
+			compatible = "fsl,imx8mq-pcie";
+			reg = <0x33800000 0x400000>,
+			      <0x1ff00000 0x80000>;
+			reg-names = "dbi", "config";
+			#address-cells = <3>;
+			#size-cells = <2>;
+			device_type = "pci";
+			bus-range = <0x00 0xff>;
+			ranges = <0x81000000 0 0x00000000 0x1ff80000 0 0x00010000 /* downstream I/O 64KB */
+				  0x82000000 0 0x18000000 0x18000000 0 0x07f00000>; /* non-prefetchable memory */
+			num-lanes = <1>;
+			num-viewport = <4>;
+			interrupts = <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "msi";
+			#interrupt-cells = <1>;
+			interrupt-map-mask = <0 0 0 0x7>;
+			interrupt-map = <0 0 0 1 &gic GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 2 &gic GIC_SPI 124 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 3 &gic GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>,
+					<0 0 0 4 &gic GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>;
+			fsl,max-link-speed = <2>;
+			power-domains = <&pgc_pcie>;
+			resets = <&src IMX8MQ_RESET_PCIEPHY>,
+				 <&src IMX8MQ_RESET_PCIE_CTRL_APPS_EN>,
+				 <&src IMX8MQ_RESET_PCIE_CTRL_APPS_TURNOFF>;
+			reset-names = "pciephy", "apps", "turnoff";
+			clocks = <&clk IMX8MM_CLK_PCIE1_ROOT>,
+				 <&clk IMX8MM_CLK_PCIE1_AUX>,
+				 <&clk IMX8MM_CLK_PCIE1_PHY>;
+			clock-names = "pcie", "pcie_bus", "pcie_phy";
+			status = "disabled";
+		};
+
 		gic: interrupt-controller@...00000 {
 			compatible = "arm,gic-v3";
 			reg = <0x38800000 0x10000>, /* GIC Dist */
-- 
2.20.1