From: Francesco Dolcini <[email protected]>
Set VDD_CORE minimum voltage to 0.75V, TI AM62 can run at either 0.75V
or 0.85V depending on the actual speed grade and on the maximum
configured speed (1.4GHz frequency requires 0.85V).
The actual value is programmed into the PMIC EEPROM during manufacturing
(according to the SOC speed grade) and this ensure that both the voltage
values are valid and therefore the OS will not overwrite the value
programmed into the PMIC.
Signed-off-by: Francesco Dolcini <[email protected]>
---
arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi b/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
index 6a06724b6d16..4129566172a2 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi
@@ -1118,7 +1118,7 @@ reg_vdd_core: buck1 {
regulator-always-on;
regulator-boot-on;
regulator-max-microvolt = <850000>;
- regulator-min-microvolt = <850000>;
+ regulator-min-microvolt = <750000>;
regulator-name = "+VDD_CORE (PMIC BUCK1)";
};
--
2.39.2
Hi Francesco Dolcini,
On Tue, 13 Feb 2024 16:56:22 +0100, Francesco Dolcini wrote:
> Set VDD_CORE minimum voltage to 0.75V, TI AM62 can run at either 0.75V
> or 0.85V depending on the actual speed grade and on the maximum
> configured speed (1.4GHz frequency requires 0.85V).
>
> The actual value is programmed into the PMIC EEPROM during manufacturing
> (according to the SOC speed grade) and this ensure that both the voltage
> values are valid and therefore the OS will not overwrite the value
> programmed into the PMIC.
>
> [...]
I have applied the following to branch ti-k3-dts-next on [1].
Thank you!
[1/1] arm64: dts: ti: verdin-am62: Set VDD CORE minimum voltage to 0.75V
commit: 2af8358ad64fb4bf012a6dc2917fbfc78a2093b2
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent up the chain during
the next merge window (or sooner if it is a relevant bug fix), however if
problems are discovered then the patch may be dropped or reverted.
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[1] https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux.git
--
Vignesh