[PATCH v5 9/9] arm64: dts: nuvoton: ma35d1: Add LXT crystal and correct HXT name

[Miquel Raynal]

The clock controller takes its two crystal oscillator inputs from the
board: HXT and LXT. The current description of these crystals is wrong:
- HXT is described but not named correctly, which leads to two clocks
  being created without any relationship: hxt and clk_hxt. Fix this by
  exposing a correct name for hxt.
- LXT is not even described. Add the fixed clock node for it and
  reference it from the clock controller node.

Fixes: 691521a367cf ("clk: nuvoton: Add clock driver for ma35d1 clock controller")
Fixes: b69af0984732 ("arm64: dts: nuvoton: Add initial ma35d1 device tree")
Cc: stable at vger.kernel.org
Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---

Without this patch, but with the previous patches applied:
* the platform correctly boots
* the peripherals are usable (the spi controller clock gets a correct rate)
* the HXT and LXT frequencies are guessed by the clock driver
* a spurious clk_hxt clock appears in the clk_summary (but is harmless)
---
 arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts | 9 ++++++++-
 arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts | 9 ++++++++-
 arch/arm64/boot/dts/nuvoton/ma35d1.dtsi         | 3 ++-
 3 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts b/arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts
index 78534d613486..cb7d6f9ee297 100644
--- a/arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1-iot-512m.dts
@@ -35,7 +35,14 @@ clk_hxt: clock-hxt {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
 		clock-frequency = <24000000>;
-		clock-output-names = "clk_hxt";
+		clock-output-names = "hxt";
+	};
+
+	clk_lxt: clock-lxt {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+		clock-output-names = "lxt";
 	};
 };
 
diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts b/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
index a029b660e8dc..992104289c81 100644
--- a/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts
@@ -35,7 +35,14 @@ clk_hxt: clock-hxt {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
 		clock-frequency = <24000000>;
-		clock-output-names = "clk_hxt";
+		clock-output-names = "hxt";
+	};
+
+	clk_lxt: clock-lxt {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+		clock-output-names = "lxt";
 	};
 };
 
diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
index 7228ad4735b5..9a341c2b1397 100644
--- a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
+++ b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi
@@ -92,7 +92,8 @@ clk: clock-controller at 40460200 {
 			compatible = "nuvoton,ma35d1-clk";
 			reg = <0x00000000 0x40460200 0x0 0x100>;
 			#clock-cells = <1>;
-			clocks = <&clk_hxt>;
+			clocks = <&clk_hxt>, <&clk_lxt>;
+			clock-names = "hxt", "lxt";
 		};
 
 		pinctrl: pinctrl at 40040000 {

-- 
2.55.0