The PCIe reference clock required by the PCIe Endpoints connected to the
PCIe connector corresponding to the PCIe1 instance of PCIe on J784S4-EVM
is driven by the ACSPCIE module. Add the device-tree support for enabling
the same.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
---

Hello,

This patch is based on linux-next tagged next-20240930.
The dependencies mentioned in the v1 patch have been merged and this
patch doesn't have dependencies anymore.

v1:
https://lore.kernel.org/r/20240715123301.1184833-1-s-vadapalli@ti.com/
Changes since v1:
- Rebased patch on next-20240930.

Logs validating this patch with an NVMe SSD connected to the PCIe connector
corresponding to the PCIe1 instance of PCIe on J784S4 EVM:
https://gist.github.com/Siddharth-Vadapalli-at-TI/19a878518b657df434396b4bed78f945

Regards,
Siddharth.

 arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi b/arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi
index e73bb750b09a..bef115575cab 100644
--- a/arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi
@@ -7,6 +7,7 @@
 
 #include <dt-bindings/mux/mux.h>
 #include <dt-bindings/phy/phy.h>
+#include <dt-bindings/phy/phy-cadence.h>
 #include <dt-bindings/phy/phy-ti.h>
 
 #include "k3-serdes.h"
@@ -81,6 +82,11 @@ pcie3_ctrl: pcie3-ctrl@407c {
 			reg = <0x407c 0x4>;
 		};
 
+		acspcie0_proxy_ctrl: acspcie0-ctrl@1a090 {
+			compatible = "ti,j784s4-acspcie-proxy-ctrl", "syscon";
+			reg = <0x1a090 0x4>;
+		};
+
 		serdes_ln_ctrl: mux-controller@4080 {
 			compatible = "reg-mux";
 			reg = <0x00004080 0x30>;
@@ -1094,11 +1100,12 @@ pcie1_rc: pcie@2910000 {
 		interrupts = <GIC_SPI 330 IRQ_TYPE_EDGE_RISING>;
 		device_type = "pci";
 		ti,syscon-pcie-ctrl = <&pcie1_ctrl 0x0>;
+		ti,syscon-acspcie-proxy-ctrl = <&acspcie0_proxy_ctrl 0x1>;
 		max-link-speed = <3>;
 		num-lanes = <4>;
 		power-domains = <&k3_pds 333 TI_SCI_PD_EXCLUSIVE>;
-		clocks = <&k3_clks 333 0>;
-		clock-names = "fck";
+		clocks = <&k3_clks 333 0>, <&serdes0 CDNS_TORRENT_REFCLK_DRIVER>;
+		clock-names = "fck", "pcie_refclk";
 		#address-cells = <3>;
 		#size-cells = <2>;
 		bus-range = <0x0 0xff>;
-- 
2.40.1