Re: [PATCH v5 07/13] soc: qcom: geni-se: Introduce helper APIs for performance control

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 2/6/26 6:41 PM, Praveen Talari wrote:
> The GENI Serial Engine (SE) drivers (I2C, SPI, and SERIAL) currently
> manage performance levels and operating points directly. This resulting
> in code duplication across drivers. such as configuring a specific level
> or find and apply an OPP based on a clock frequency.
> 
> Introduce two new helper APIs, geni_se_set_perf_level() and
> geni_se_set_perf_opp(), addresses this issue by providing a streamlined
> method for the GENI Serial Engine (SE) drivers to find and set the OPP
> based on the desired performance level, thereby eliminating redundancy.
> 
> Signed-off-by: Praveen Talari <praveen.talari@oss.qualcomm.com>
> ---

[...]

> +/**
> + * geni_se_set_perf_level() - Set performance level for GENI SE.
> + * @se: Pointer to the struct geni_se instance.
> + * @level: The desired performance level.
> + *
> + * Sets the performance level by directly calling dev_pm_opp_set_level
> + * on the performance device associated with the SE.
> + *
> + * Return: 0 on success, or a negative error code on failure.
> + */
> +int geni_se_set_perf_level(struct geni_se *se, unsigned long level)
> +{
> +	return dev_pm_opp_set_level(se->pd_list->pd_devs[DOMAIN_IDX_PERF], level);
> +}

My only remaining concern with this patch is this export - on v3 you
mentioned that it'd be used in the UART driver (which currently does
more or less the same thing, open-coded) - are we unable to leverage
dev_pm_opp_set_rate there too? i.e. are the OPP tables produced by the
SCMI servers not populating the rate field for UART specifically?

Konrad