[PATCH v3 1/3] arm64: dts: qcom: purwa-iot-evk: use on-board crystal for PS8830 retimers

[Xin Liu <xin.liu@oss.qualcomm.com>]

On the Purwa IoT EVK, each PS8830 retimer has its own 25 MHz crystal
wired to the retimer's XI/XO pins. The reference clock does not come
from the PMIC, so the RPMH_RF_CLK4/5 references in the retimer nodes
are wrong: they keep those RF clocks enabled for nothing and describe a
connection that does not exist on the board.

Remove the stale "Left unused" annotation from the vreg_rtmr0 regulators
as the retimer is actively used.

Fixes: 9ed20e877239 ("arm64: dts: qcom: Add base PURWA-IOT-EVK board")
Signed-off-by: Xin Liu <xin.liu@oss.qualcomm.com>
---
v3: New patch.
---
 arch/arm64/boot/dts/qcom/purwa-iot-evk.dts | 27 ++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts b/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts
index 6fc6fe7c0899..4380a46b33b2 100644
--- a/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts
+++ b/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts
@@ -60,6 +60,26 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
+	clocks {
+		clk_rtmr0_xo: clock-rtmr0-xo {
+			compatible = "fixed-clock";
+			clock-frequency = <25000000>;
+			#clock-cells = <0>;
+		};
+
+		clk_rtmr1_xo: clock-rtmr1-xo {
+			compatible = "fixed-clock";
+			clock-frequency = <25000000>;
+			#clock-cells = <0>;
+		};
+
+		clk_rtmr2_xo: clock-rtmr2-xo {
+			compatible = "fixed-clock";
+			clock-frequency = <25000000>;
+			#clock-cells = <0>;
+		};
+	};
+
 	connector3 {
 		compatible = "usb-a-connector";
 		label = "USB-3-Type-A";
@@ -295,7 +315,6 @@ vreg_pcie_3v3_aux: regulator-pcie-3v3-aux {
 		pinctrl-names = "default";
 	};
 
-	/* Left unused as the retimer is not used on this board. */
 	vreg_rtmr0_1p15: regulator-rtmr0-1p15 {
 		compatible = "regulator-fixed";
 
@@ -639,7 +658,7 @@ typec-mux@8 {
 		compatible = "parade,ps8830";
 		reg = <0x08>;
 
-		clocks = <&rpmhcc RPMH_RF_CLK5>;
+		clocks = <&clk_rtmr2_xo>;
 
 		vdd-supply = <&vreg_rtmr2_1p15>;
 		vdd33-supply = <&vreg_rtmr2_3p3>;
@@ -696,7 +715,7 @@ typec-mux@8 {
 		compatible = "parade,ps8830";
 		reg = <0x8>;
 
-		clocks = <&rpmhcc RPMH_RF_CLK4>;
+		clocks = <&clk_rtmr0_xo>;
 
 		vdd-supply = <&vreg_rtmr0_1p15>;
 		vdd33-supply = <&vreg_rtmr0_3p3>;
@@ -801,7 +820,7 @@ typec-mux@8 {
 		compatible = "parade,ps8830";
 		reg = <0x8>;
 
-		clocks = <&rpmhcc RPMH_RF_CLK4>;
+		clocks = <&clk_rtmr1_xo>;
 
 		vdd-supply = <&vreg_rtmr1_1p15>;
 		vdd33-supply = <&vreg_rtmr1_3p3>;
-- 
2.43.0