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

* [PATCH] arm64: dts: imx8mp: Describe PCIe clock generator on DH electronics i.MX8M Plus DHCOM on PDK3
@ 2023-05-15 15:51 ` Marek Vasut
  0 siblings, 0 replies; 4+ messages in thread
From: Marek Vasut @ 2023-05-15 15:51 UTC (permalink / raw)
  To: linux-arm-kernel
  Cc: Marek Vasut, Conor Dooley, Fabio Estevam, Krzysztof Kozlowski,
	NXP Linux Team, Pengutronix Kernel Team, Rob Herring,
	Sascha Hauer, Shawn Guo, devicetree

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@denx.de>
---
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: linux-arm-kernel@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@54 {
 				pagesize = <16>;
 				reg = <0x54>;
 			};
+
+			pcieclk: clock@6b {
+				compatible = "skyworks,si52144";
+				reg = <0x6b>;
+				clocks = <&clk_xtal25>;
+				#clock-cells = <1>;
+			};
 		};
 
 		i2cmuxed1: i2c@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


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