* [PATCH] ARM: dts: omap36xx: declare 1GHz OPP as turbo again
@ 2024-10-18 21:47 Andreas Kemnade
2024-10-30 0:10 ` Kevin Hilman
0 siblings, 1 reply; 2+ messages in thread
From: Andreas Kemnade @ 2024-10-18 21:47 UTC (permalink / raw)
To: tony, robh, krzk+dt, conor+dt, aford173, linux-omap, devicetree,
linux-kernel, aaro.koskinen, khilman, Roger Quadros
Cc: Andreas Kemnade, Stable
Operating stable without reduced chip life at 1Ghz needs several
technologies working: The technologies involve
- SmartReflex
- DVFS
As this cannot directly specified in the OPP table as dependecies in the
devicetree yet, use the turbo flag again to mark this OPP as something
special to have some kind of opt-in.
So revert commit
5f1bf7ae8481 ("ARM: dts: omap36xx: Remove turbo mode for 1GHz variants")
Practical reasoning:
At least the GTA04A5 (DM3730) has become unstable with that OPP enabled.
Furthermore nothing enforces the availability of said technologies,
even in the kernel configuration, so allow users to rather opt-in.
Cc: Stable@vger.kernel.org
Fixes: 5f1bf7ae8481 ("ARM: dts: omap36xx: Remove turbo mode for 1GHz variants")
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
---
arch/arm/boot/dts/ti/omap/omap36xx.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/ti/omap/omap36xx.dtsi b/arch/arm/boot/dts/ti/omap/omap36xx.dtsi
index c3d79ecd56e39..c217094b50abc 100644
--- a/arch/arm/boot/dts/ti/omap/omap36xx.dtsi
+++ b/arch/arm/boot/dts/ti/omap/omap36xx.dtsi
@@ -72,6 +72,7 @@ opp-1000000000 {
<1375000 1375000 1375000>;
/* only on am/dm37x with speed-binned bit set */
opp-supported-hw = <0xffffffff 2>;
+ turbo-mode;
};
};
--
2.39.2
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] ARM: dts: omap36xx: declare 1GHz OPP as turbo again
2024-10-18 21:47 [PATCH] ARM: dts: omap36xx: declare 1GHz OPP as turbo again Andreas Kemnade
@ 2024-10-30 0:10 ` Kevin Hilman
0 siblings, 0 replies; 2+ messages in thread
From: Kevin Hilman @ 2024-10-30 0:10 UTC (permalink / raw)
To: tony, robh, krzk+dt, conor+dt, aford173, linux-omap, devicetree,
linux-kernel, aaro.koskinen, Roger Quadros, Andreas Kemnade
Cc: Stable
On Fri, 18 Oct 2024 23:47:27 +0200, Andreas Kemnade wrote:
> Operating stable without reduced chip life at 1Ghz needs several
> technologies working: The technologies involve
> - SmartReflex
> - DVFS
>
> As this cannot directly specified in the OPP table as dependecies in the
> devicetree yet, use the turbo flag again to mark this OPP as something
> special to have some kind of opt-in.
>
> [...]
Applied, thanks!
[1/1] ARM: dts: omap36xx: declare 1GHz OPP as turbo again
commit: 96a64e9730c2c76cfa5c510583a0fbf40d62886b
Best regards,
--
Kevin Hilman <khilman@baylibre.com>
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