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* [PATCH] powerpc: DTS: mpc8313erdb: Add timer@*/clock-frequency properties
@ 2026-01-01 17:09 J. Neuschäfer via B4 Relay
  0 siblings, 0 replies; only message in thread
From: J. Neuschäfer via B4 Relay @ 2026-01-01 17:09 UTC (permalink / raw)
  To: Rob Herring, Krzysztof Kozlowski, Conor Dooley,
	Madhavan Srinivasan, Michael Ellerman, Nicholas Piggin,
	Christophe Leroy (CS GROUP)
  Cc: devicetree, linuxppc-dev, linux-kernel, kernel test robot,
	J. Neuschäfer

From: "J. Neuschäfer" <j.ne@posteo.net>

The recent formalization of the fsl,gtm schema has shown that
mpc8313erdb.dts doesn't provide the clock-frequency property on timer
nodes. A few different expectations collide here:

 - Both the binding and the driver for the Freescale global timer module
   (GTM) have always required clock-frequency, since their addition in
   2008 (v2.6.26-rc5-236-g83ff9dcf375c41).
 - mpc8313erdb.dts never had the timer@*/clock-frequency property, since
   the timer nodes were added in 2008 (v2.6.26-3343-g574366128db29e)

I suspect the way this worked was that the bootloader filled these
values when booting on an MPC8313 board.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202505300136.HOpO5P6y-lkp@intel.com/
Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
---
 arch/powerpc/boot/dts/mpc8313erdb.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/boot/dts/mpc8313erdb.dts b/arch/powerpc/boot/dts/mpc8313erdb.dts
index 09508b4c8c7309..0bddc3be9e62f8 100644
--- a/arch/powerpc/boot/dts/mpc8313erdb.dts
+++ b/arch/powerpc/boot/dts/mpc8313erdb.dts
@@ -308,6 +308,7 @@ gtm1: timer@500 {
 			reg = <0x500 0x100>;
 			interrupts = <90 8 78 8 84 8 72 8>;
 			interrupt-parent = <&ipic>;
+			clock-frequency = <0>; /* filled by bootloader */
 		};
 
 		timer@600 {
@@ -315,6 +316,7 @@ timer@600 {
 			reg = <0x600 0x100>;
 			interrupts = <91 8 79 8 85 8 73 8>;
 			interrupt-parent = <&ipic>;
+			clock-frequency = <0>; /* filled by bootloader */
 		};
 	};
 

---
base-commit: 9448598b22c50c8a5bb77a9103e2d49f134c9578
change-id: 20250625-timer-clock-e03fa9e835c8

Best regards,
-- 
J. Neuschäfer <j.ne@posteo.net>




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