Re: [PATCH v2 11/11] soc: qcom: ice: Allow explicit votes on 'iface' clock for ICE

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

On 3/10/26 9:06 AM, Harshal Dev wrote:
> Since Qualcomm inline-crypto engine (ICE) is now a dedicated driver
> de-coupled from the QCOM UFS driver, it explicitly votes for its required
> clocks during probe. For scenarios where the 'clk_ignore_unused' flag is
> not passed on the kernel command line, to avoid potential unclocked ICE
> hardware register access during probe the ICE driver should additionally
> vote on the 'iface' clock.
> Also update the suspend and resume callbacks to handle un-voting and voting
> on the 'iface' clock.
> 
> Fixes: 2afbf43a4aec6 ("soc: qcom: Make the Qualcomm UFS/SDCC ICE a dedicated driver")
> Signed-off-by: Harshal Dev <harshal.dev@oss.qualcomm.com>
> ---
>  drivers/soc/qcom/ice.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/soc/qcom/ice.c b/drivers/soc/qcom/ice.c
> index b203bc685cad..e05dc7b274e0 100644
> --- a/drivers/soc/qcom/ice.c
> +++ b/drivers/soc/qcom/ice.c
> @@ -108,6 +108,7 @@ struct qcom_ice {
>  	void __iomem *base;
>  
>  	struct clk *core_clk;
> +	struct clk *iface_clk;
>  	bool use_hwkm;
>  	bool hwkm_init_complete;
>  	u8 hwkm_version;
> @@ -316,6 +317,13 @@ int qcom_ice_resume(struct qcom_ice *ice)
>  			err);
>  		return err;
>  	}
> +
> +	err = clk_prepare_enable(ice->iface_clk);
> +	if (err) {
> +		dev_err(dev, "failed to enable iface clock (%d)\n",
> +			err);

dev_err(dev, "Failed to enable 'iface' clock: %d\n", err);

(this line is very short, no need to wrap, also some nitty touch-ups)

[...]

> +	engine->iface_clk = devm_clk_get_optional_enabled(dev, "iface_clk");

Check for IS_ERR, _optional won't throw an error if it's absent,
but will if there's anything more serious that's wrong

Konrad