linux-kernel - Re: [PATCH v4 2/4] thermal: qcom: tsens: Add hooks for supplying platform specific reinit quirks

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Date:   Tue, 13 Sep 2022 14:19:01 -0500
From:   Bjorn Andersson <andersson@...nel.org>
To:     Bhupesh Sharma <bhupesh.sharma@...aro.org>
Cc:     linux-pm@...r.kernel.org, bhupesh.linux@...il.com,
        linux-kernel@...r.kernel.org, konrad.dybcio@...ainline.org,
        linux-arm-msm@...r.kernel.org, daniel.lezcano@...aro.org,
        robh+dt@...nel.org, rafael@...nel.org,
        Amit Kucheria <amitk@...nel.org>,
        Thara Gopinath <thara.gopinath@...il.com>
Subject: Re: [PATCH v4 2/4] thermal: qcom: tsens: Add hooks for supplying
 platform specific reinit quirks

On Thu, Sep 01, 2022 at 04:24:12PM +0530, Bhupesh Sharma wrote:
> Add hooks inside platform specific data which can be
> used by Qualcomm tsens controller(s) which might need
> reinitialization via trustzone.
> 
> Cc: Bjorn Andersson <andersson@...nel.org>
> Cc: Amit Kucheria <amitk@...nel.org>
> Cc: Thara Gopinath <thara.gopinath@...il.com>
> Cc: linux-pm@...r.kernel.org
> Cc: linux-arm-msm@...r.kernel.org
> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@...aro.org>
> ---
>  drivers/thermal/qcom/tsens.h | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
> index ba05c8233356..92787017c6ab 100644
> --- a/drivers/thermal/qcom/tsens.h
> +++ b/drivers/thermal/qcom/tsens.h
> @@ -513,6 +513,7 @@ struct tsens_features {
>   * @num_sensors: Number of sensors supported by platform
>   * @ops: operations the tsens instance supports
>   * @hw_ids: Subset of sensors ids supported by platform, if not the first n
> + * @needs_reinit_wa: tsens controller might need reinit via trustzone

What does "_wa" mean, and what value does it add?

needs_reinit captures the intent pretty well in my view.

Regards,
Bjorn

>   * @feat: features of the IP
>   * @fields: bitfield locations
>   */
> @@ -520,6 +521,7 @@ struct tsens_plat_data {
>  	const u32		num_sensors;
>  	const struct tsens_ops	*ops;
>  	unsigned int		*hw_ids;
> +	bool			needs_reinit_wa;
>  	struct tsens_features	*feat;
>  	const struct reg_field		*fields;
>  };
> @@ -542,6 +544,7 @@ struct tsens_context {
>   * @srot_map: pointer to SROT register address space
>   * @tm_offset: deal with old device trees that don't address TM and SROT
>   *             address space separately
> + * @needs_reinit_wa: tsens controller might need reinit via trustzone
>   * @ul_lock: lock while processing upper/lower threshold interrupts
>   * @crit_lock: lock while processing critical threshold interrupts
>   * @rf: array of regmap_fields used to store value of the field
> @@ -559,6 +562,7 @@ struct tsens_priv {
>  	struct regmap			*tm_map;
>  	struct regmap			*srot_map;
>  	u32				tm_offset;
> +	bool				needs_reinit_wa;
>  
>  	/* lock for upper/lower threshold interrupts */
>  	spinlock_t			ul_lock;
> -- 
> 2.37.1
>