[PATCH] arm64: dts: imx8mp: Describe PCIe clock generator on DH electronics i.MX8M Plus DHCOM on PDK3

[Marek Vasut]

The PDK3 carrier board contains a PCIe clock generator which is used to
supply the PCIe clock lanes. This generator is always on, unless external
CLKREQ signal toggles an output off, but this is handled in hardware. The
generator does however have I2C interface, describe it in DT.

Signed-off-by: Marek Vasut <marex at denx.de>
---
Cc: Conor Dooley <conor+dt at kernel.org>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt at linaro.org>
Cc: NXP Linux Team <linux-imx at nxp.com>
Cc: Pengutronix Kernel Team <kernel at pengutronix.de>
Cc: Rob Herring <robh+dt at kernel.org>
Cc: Sascha Hauer <s.hauer at pengutronix.de>
Cc: Shawn Guo <shawnguo at kernel.org>
Cc: devicetree at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
---
 arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk3.dts | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk3.dts b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk3.dts
index b5e76b992a103..24dc58b3404fb 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk3.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-pdk3.dts
@@ -23,10 +23,10 @@ chosen {
 		stdout-path = &uart1;
 	};
 
-	clk_pcie: clock-pcie {
+	clk_xtal25: clock-xtal25 {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
-		clock-frequency = <100000000>;
+		clock-frequency = <25000000>;
 	};
 
 	connector {
@@ -203,6 +203,13 @@ eeprom_board: eeprom at 54 {
 				pagesize = <16>;
 				reg = <0x54>;
 			};
+
+			pcieclk: clock at 6b {
+				compatible = "skyworks,si52144";
+				reg = <0x6b>;
+				clocks = <&clk_xtal25>;
+				#clock-cells = <1>;
+			};
 		};
 
 		i2cmuxed1: i2c at 1 {	/* HDMI DDC I2C */
@@ -244,7 +251,7 @@ &flexcan1 {
 };
 
 &pcie_phy {
-	clocks = <&clk_pcie>;
+	clocks = <&pcieclk 1>;
 	clock-names = "ref";
 	fsl,refclk-pad-mode = <IMX8_PCIE_REFCLK_PAD_INPUT>;
 	status = "okay";
-- 
2.39.2