[PATCH] ARM: dts: r8a7779, marzen: Fix DU clock names

[Geert Uytterhoeven]

"make dtbs_check" complains:

    arch/arm/boot/dts/r8a7779-marzen.dt.yaml: display at fff80000: clock-names:0: 'du.0' was expected

Change the first clock name to match the DT bindings.
This has no effect on actual operation, as the Display Unit driver in
Linux does not use the first clock name on R-Car H1, but just grabs the
first clock.

Fixes: 665d79aa47cb3983 ("ARM: shmobile: marzen: Add DU external pixel clock to DT")
Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
---
To be queued in renesas-devel for v5.14.

 arch/arm/boot/dts/r8a7779-marzen.dts | 2 +-
 arch/arm/boot/dts/r8a7779.dtsi       | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/r8a7779-marzen.dts b/arch/arm/boot/dts/r8a7779-marzen.dts
index d2240b89ee52929b..46584532349590d1 100644
--- a/arch/arm/boot/dts/r8a7779-marzen.dts
+++ b/arch/arm/boot/dts/r8a7779-marzen.dts
@@ -145,7 +145,7 @@ &du {
 	status = "okay";
 
 	clocks = <&mstp1_clks R8A7779_CLK_DU>, <&x3_clk>;
-	clock-names = "du", "dclkin.0";
+	clock-names = "du.0", "dclkin.0";
 
 	ports {
 		port at 0 {
diff --git a/arch/arm/boot/dts/r8a7779.dtsi b/arch/arm/boot/dts/r8a7779.dtsi
index 74d7e9084eabe173..3c5fcdfe16b87182 100644
--- a/arch/arm/boot/dts/r8a7779.dtsi
+++ b/arch/arm/boot/dts/r8a7779.dtsi
@@ -463,6 +463,7 @@ du: display at fff80000 {
 		reg = <0xfff80000 0x40000>;
 		interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp1_clks R8A7779_CLK_DU>;
+		clock-names = "du.0";
 		power-domains = <&sysc R8A7779_PD_ALWAYS_ON>;
 		status = "disabled";
 
-- 
2.25.1