arch: arm: dts: Add RTC clock nodes for ZynqMP platform

Add fixed RTC clock nodes at 32.768 kHz for ZynqMP. The RTC driver uses
this clock to calculate the calibration value, replacing the deprecated
calibration device tree property.

Signed-off-by: Harini T <harini.t@amd.com>
Reviewed-by: Tomas Melin <tomas.melin@vaisala.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://patch.msgid.link/8838c8c4fcd0dfe151bcee2a6c4da51df81e23cb.1782726386.git.michal.simek@amd.com

diff --git a/arch/arm/dts/zynqmp-clk-ccf.dtsi b/arch/arm/dts/zynqmp-clk-ccf.dtsi
index 482f432ba7f3d313d4f4b674e9b5878bd2d1cbf8..877962df2b36d4ac99840441e169d9b841105a6a 100644 (file)
--- a/arch/arm/dts/zynqmp-clk-ccf.dtsi
+++ b/arch/arm/dts/zynqmp-clk-ccf.dtsi
@@ -3,7 +3,7 @@
  * Clock specification for Xilinx ZynqMP
  *
  * (C) Copyright 2017 - 2022, Xilinx, Inc.
- * (C) Copyright 2022 - 2023, Advanced Micro Devices, Inc.
+ * (C) Copyright 2022 - 2026, Advanced Micro Devices, Inc.
  *
  * Michal Simek <michal.simek@amd.com>
  */
@@ -49,6 +49,14 @@
                clock-frequency = <27000000>;
                clock-output-names = "aux_ref_clk";
        };
+
+       rtc_clk: rtc-clk {
+               bootph-all;
+               compatible = "fixed-clock";
+               #clock-cells = <0>;
+               clock-frequency = <32768>;
+               clock-output-names = "rtc_clk";
+       };
 };
 
 &zynqmp_firmware {
@@ -302,3 +310,8 @@
                          <&zynqmp_clk DP_AUDIO_REF>,
                          <&zynqmp_clk DP_VIDEO_REF>;  /* rpll, rpll, vpll */
 };
+
+&rtc {
+       clocks = <&rtc_clk>;
+       clock-names = "rtc";
+};

diff --git a/arch/arm/dts/zynqmp.dtsi b/arch/arm/dts/zynqmp.dtsi
index 13cfca666572ff4bcb8005d6eea00cafce9e5e54..c225eb219f4cb46efa7e87f4e77865ac8b84523c 100644 (file)
--- a/arch/arm/dts/zynqmp.dtsi
+++ b/arch/arm/dts/zynqmp.dtsi
@@ -1006,7 +1006,6 @@
                        interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>,
                                     <GIC_SPI 27 IRQ_TYPE_LEVEL_HIGH>;
                        interrupt-names = "alarm", "sec";
-                       calibration = <0x7FFF>;
                };
 
                sata: ahci@fd0c0000 {