arm64: dts: ti: k3-am642-evm: Add overlay for PCIe0 EP mode

Commit Message

Siddharth Vadapalli Sept. 30, 2024, 10:34 a.m. UTC

Add overlay to enable the PCIe0 instance of PCIe on AM642-EVM in
Endpoint mode of operation.

Signed-off-by: Siddharth Vadapalli <[e-mail]>
---

Hello,

This patch is based on linux-next tagged next-20240930.

Logs validating the device-tree overlay with AM642-EVM as Endpoint and
J784S4-EVM as Root Complex:
https://gist.github.com/Siddharth-Vadapalli-at-TI/d3c071d0a34b7ef162e1413f1688cc9d

Regards,
Siddharth.

 arch/arm64/boot/dts/ti/Makefile               |  4 ++
 .../boot/dts/ti/k3-am642-evm-pcie0-ep.dtso    | 51 +++++++++++++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-am642-evm-pcie0-ep.dtso

Comments

Vignesh Raghavendra Oct. 30, 2024, 4:50 a.m. UTC | #1

Hi Siddharth Vadapalli,

On Mon, 30 Sep 2024 16:04:13 +0530, Siddharth Vadapalli wrote:
> Add overlay to enable the PCIe0 instance of PCIe on AM642-EVM in
> Endpoint mode of operation.
> 
> 

I have applied the following to branch ti-k3-dts-next on [1].
Thank you!

[1/1] arm64: dts: ti: k3-am642-evm: Add overlay for PCIe0 EP mode
      commit: 34d7b8419323f6e35cecb445ec39ba5fd30a2d27

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent up the chain during
the next merge window (or sooner if it is a relevant bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux.git
--
Vignesh

Patch

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index bcd392c3206e..c1417b38a4e6 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -48,6 +48,7 @@  k3-am642-hummingboard-t-usb3-dtbs := \
 dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am642-evm-icssg1-dualemac.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am642-evm-icssg1-dualemac-mii.dtbo
+dtb-$(CONFIG_ARCH_K3) += k3-am642-evm-pcie0-ep.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am642-hummingboard-t.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am642-hummingboard-t-pcie.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am642-hummingboard-t-usb3.dtb
@@ -168,6 +169,8 @@  k3-am642-evm-icssg1-dualemac-dtbs := \
 	k3-am642-evm.dtb k3-am642-evm-icssg1-dualemac.dtbo
 k3-am642-evm-icssg1-dualemac-mii-dtbs := \
 	k3-am642-evm.dtb k3-am642-evm-icssg1-dualemac-mii.dtbo
+k3-am642-evm-pcie0-ep-dtbs := \
+	k3-am642-evm.dtb k3-am642-evm-pcie0-ep.dtbo
 k3-am642-phyboard-electra-disable-eth-phy-dtbs := \
 	k3-am642-phyboard-electra-rdk.dtb k3-am6xx-phycore-disable-eth-phy.dtbo
 k3-am642-phyboard-electra-disable-rtc-dtbs := \
@@ -217,6 +220,7 @@  dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \
 	k3-am62p5-sk-csi2-tevi-ov5640.dtb \
 	k3-am642-evm-icssg1-dualemac.dtb \
 	k3-am642-evm-icssg1-dualemac-mii.dtb \
+	k3-am642-evm-pcie0-ep.dtb \
 	k3-am642-tqma64xxl-mbax4xxl-sdcard.dtb \
 	k3-am642-tqma64xxl-mbax4xxl-wlan.dtb \
 	k3-am68-sk-base-board-csi2-dual-imx219.dtb \
diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm-pcie0-ep.dtso b/arch/arm64/boot/dts/ti/k3-am642-evm-pcie0-ep.dtso
new file mode 100644
index 000000000000..6b029539e0db
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm-pcie0-ep.dtso
@@ -0,0 +1,51 @@ 
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/**
+ * DT Overlay for enabling PCIE0 instance in Endpoint Configuration with the
+ * AM642 EVM.
+ *
+ * AM642 EVM Product Link: https://www.ti.com/tool/TMDS64EVM
+ *
+ * Copyright (C) 2024 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/soc/ti,sci_pm_domain.h>
+
+#include "k3-pinctrl.h"
+
+/*
+ * Since Root Complex and Endpoint modes are mutually exclusive
+ * disable Root Complex mode.
+ */
+&pcie0_rc {
+	status = "disabled";
+};
+
+&cbass_main {
+	#address-cells = <2>;
+	#size-cells = <2>;
+	interrupt-parent = <&gic500>;
+
+	pcie0_ep: pcie-ep@f102000 {
+		compatible = "ti,am64-pcie-ep", "ti,j721e-pcie-ep";
+		reg = <0x00 0x0f102000 0x00 0x1000>,
+		      <0x00 0x0f100000 0x00 0x400>,
+		      <0x00 0x0d000000 0x00 0x00800000>,
+		      <0x00 0x68000000 0x00 0x08000000>;
+		reg-names = "intd_cfg", "user_cfg", "reg", "mem";
+		interrupt-names = "link_state";
+		interrupts = <GIC_SPI 203 IRQ_TYPE_EDGE_RISING>;
+		max-link-speed = <2>;
+		num-lanes = <1>;
+		power-domains = <&k3_pds 114 TI_SCI_PD_EXCLUSIVE>;
+		clocks = <&k3_clks 114 0>;
+		clock-names = "fck";
+		max-functions = /bits/ 8 <1>;
+		phys = <&serdes0_pcie_link>;
+		phy-names = "pcie-phy";
+		ti,syscon-pcie-ctrl = <&main_conf 0x4070>;
+	};
+};