arm64: dts: allwinner: enable h616 timer support

Add support for timer by reusing existing sun4i timer driver.

H616 timer is compatible with earlier sunxi timer variants and provides
both clocksource and clockevent functionality. It runs from 24 MHz
oscillator. It can serve as broadcast clockevent for wake up from idle
states.

Tested on Orange Pi Zero 3:
- timer is registered as clocksource:
- switching clocksource at runtime works
- timer operates as a broadcast clockevent device
- no regression observed compared to arch_sys_counter

Signed-off-by: Michal Piekos <[email protected]>
Reviewed-by: Jernej Skrabec <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Chen-Yu Tsai <[email protected]>

Author: michalpiekos

arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi

@@ -228,6 +228,15 @@
 			};
 		};
 
+		timer0: timer@3009000 {
+			compatible = "allwinner,sun50i-h616-timer",
+				     "allwinner,sun8i-a23-timer";
+			reg = <0x03009000 0xa0>;
+			interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&osc24M>;
+		};
+
 		watchdog: watchdog@30090a0 {
 			compatible = "allwinner,sun50i-h616-wdt",
 				     "allwinner,sun6i-a31-wdt";