Re: [PATCH v2 1/4] dt-bindings: clock: tegra124-dfll: Add property to limit frequency

From: Rob Herring
Date: Thu Sep 04 2025 - 17:49:18 EST


On Wed, Sep 03, 2025 at 02:30:16PM -0500, Aaron Kling wrote:
> The dfll driver generates opp tables based on internal CVB tables
> instead of using dt opp tables. Some devices such as the Jetson Nano
> require limiting the max frequency even further than the corresponding
> CVB table allows in order to maintain thermal limits.
>
> Signed-off-by: Aaron Kling <webgeek1234@xxxxxxxxx>
> ---
> Documentation/devicetree/bindings/clock/nvidia,tegra124-dfll.txt | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/clock/nvidia,tegra124-dfll.txt b/Documentation/devicetree/bindings/clock/nvidia,tegra124-dfll.txt
> index f7d347385b5775ddd702ecbb9821acfc9d4b9ff2..8a049b684f962f2b06209a47866711b92c15c085 100644
> --- a/Documentation/devicetree/bindings/clock/nvidia,tegra124-dfll.txt
> +++ b/Documentation/devicetree/bindings/clock/nvidia,tegra124-dfll.txt
> @@ -70,6 +70,9 @@ Required properties for PWM mode:
> - dvfs_pwm_enable: I/O pad configuration when PWM control is enabled.
> - dvfs_pwm_disable: I/O pad configuration when PWM control is disabled.
>
> +Optional properties for limiting frequency:
> +- nvidia,dfll-max-freq: Maximum scaling frequency in hertz.

Use standard unit suffix: nvidia,dfll-max-hz

> +
> Example for I2C:
>
> clock@70110000 {
>
> --
> 2.50.1
>