[PATCH 2/2] arm64: dts: socfpga: agilex: replace clocks reference with clock-frequency for dw-apb-timer

[Adrian Ng Ho Yin]

The Agilex clock manager is a platform driver initialised at
core_initcall, after time_init() where TIMER_OF_DECLARE callbacks run.
The timer cannot defer its probe, so clk_get() fails and the timer is
never brought up.

With clock-frequency, the tick rate is read directly from the DT node
without involving the clock framework, allowing the timer to initialise
regardless of when the clock manager is ready.

Replace clocks/clock-names with a static clock-frequency of 100 MHz,
which is the L4_SP clock rate configured by the bootloader.

Signed-off-by: Adrian Ng Ho Yin <adrian.ho.yin.ng@xxxxxxxxxx>
---
 arch/arm64/boot/dts/intel/socfpga_agilex.dtsi | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex.dtsi b/arch/arm64/boot/dts/intel/socfpga_agilex.dtsi
index 0dfbafde8822..4ed762c6e07f 100644
--- a/arch/arm64/boot/dts/intel/socfpga_agilex.dtsi
+++ b/arch/arm64/boot/dts/intel/socfpga_agilex.dtsi
@@ -491,32 +491,28 @@ timer0: timer0@ffc03000 {
 			compatible = "snps,dw-apb-timer";
 			interrupts = <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH>;
 			reg = <0xffc03000 0x100>;
-			clocks = <&clkmgr AGILEX_L4_SP_CLK>;
-			clock-names = "timer";
+			clock-frequency = <100000000>;
 		};
 
 		timer1: timer1@ffc03100 {
 			compatible = "snps,dw-apb-timer";
 			interrupts = <GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH>;
 			reg = <0xffc03100 0x100>;
-			clocks = <&clkmgr AGILEX_L4_SP_CLK>;
-			clock-names = "timer";
+			clock-frequency = <100000000>;
 		};
 
 		timer2: timer2@ffd00000 {
 			compatible = "snps,dw-apb-timer";
 			interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
 			reg = <0xffd00000 0x100>;
-			clocks = <&clkmgr AGILEX_L4_SP_CLK>;
-			clock-names = "timer";
+			clock-frequency = <100000000>;
 		};
 
 		timer3: timer3@ffd00100 {
 			compatible = "snps,dw-apb-timer";
 			interrupts = <GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>;
 			reg = <0xffd00100 0x100>;
-			clocks = <&clkmgr AGILEX_L4_SP_CLK>;
-			clock-names = "timer";
+			clock-frequency = <100000000>;
 		};
 
 		uart0: serial@ffc02000 {
-- 
2.49.GIT