linux-kernel - Re: [PATCH] thermal/drivers/qcom: Remove duplicate set next trip point interrupt code

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Message-ID: <CAHLCerOcDkUfb_SA6_XcrpYY9Zj2rmC973jApBpPJyXwEh1wVw@mail.gmail.com>
Date:   Wed, 11 Jan 2023 22:11:30 +0530
From:   Amit Kucheria <amitk@...nel.org>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     rafael@...nel.org, dmitry.baryshkov@...aro.org,
        andersson@...nel.org, konrad.dybcio@...aro.org,
        linux-pm@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Thara Gopinath <thara.gopinath@...il.com>,
        Andy Gross <agross@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] thermal/drivers/qcom: Remove duplicate set next trip
 point interrupt code

On Tue, Jan 10, 2023 at 4:04 PM Daniel Lezcano
<daniel.lezcano@...aro.org> wrote:
>
> From: Daniel Lezcano <daniel.lezcano@...aro.org>
>
> The tsens driver reprogram the next trip points in the irq
> handler. This function then call thermal_zone_device_update().
>
> However, thermal_zone_device_update() calls thermal_zone_set_trips()
> and from there it calls the backend 'set_trips' ops. This one in turn
> reprogram the next trip points (low/high).
>
> Consequently, the code setting the next trip points interrupt in the
> interrupt handle is not needed and could be removed.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...nel.org>

Acked-by: Amit Kucheria <amitk@...nel.org>

> ---
>  drivers/thermal/qcom/tsens.c | 46 +-----------------------------------
>  1 file changed, 1 insertion(+), 45 deletions(-)
>
> diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
> index b5b136ff323f..58693ee8c430 100644
> --- a/drivers/thermal/qcom/tsens.c
> +++ b/drivers/thermal/qcom/tsens.c
> @@ -472,52 +472,8 @@ static irqreturn_t tsens_irq_thread(int irq, void *data)
>                         continue;
>                 if (!tsens_threshold_violated(priv, hw_id, &d))
>                         continue;
> -               ret = get_temp_tsens_valid(s, &temp);
> -               if (ret) {
> -                       dev_err(priv->dev, "[%u] %s: error reading sensor\n",
> -                               hw_id, __func__);
> -                       continue;
> -               }
>
> -               spin_lock_irqsave(&priv->ul_lock, flags);
> -
> -               tsens_read_irq_state(priv, hw_id, s, &d);
> -
> -               if (d.up_viol &&
> -                   !masked_irq(hw_id, d.up_irq_mask, tsens_version(priv))) {
> -                       tsens_set_interrupt(priv, hw_id, UPPER, disable);
> -                       if (d.up_thresh > temp) {
> -                               dev_dbg(priv->dev, "[%u] %s: re-arm upper\n",
> -                                       hw_id, __func__);
> -                               tsens_set_interrupt(priv, hw_id, UPPER, enable);
> -                       } else {
> -                               trigger = true;
> -                               /* Keep irq masked */
> -                       }
> -               } else if (d.low_viol &&
> -                          !masked_irq(hw_id, d.low_irq_mask, tsens_version(priv))) {
> -                       tsens_set_interrupt(priv, hw_id, LOWER, disable);
> -                       if (d.low_thresh < temp) {
> -                               dev_dbg(priv->dev, "[%u] %s: re-arm low\n",
> -                                       hw_id, __func__);
> -                               tsens_set_interrupt(priv, hw_id, LOWER, enable);
> -                       } else {
> -                               trigger = true;
> -                               /* Keep irq masked */
> -                       }
> -               }
> -
> -               spin_unlock_irqrestore(&priv->ul_lock, flags);
> -
> -               if (trigger) {
> -                       dev_dbg(priv->dev, "[%u] %s: TZ update trigger (%d mC)\n",
> -                               hw_id, __func__, temp);
> -                       thermal_zone_device_update(s->tzd,
> -                                                  THERMAL_EVENT_UNSPECIFIED);
> -               } else {
> -                       dev_dbg(priv->dev, "[%u] %s: no violation:  %d\n",
> -                               hw_id, __func__, temp);
> -               }
> +               thermal_zone_device_update(s->tzd, THERMAL_EVENT_UNSPECIFIED);
>
>                 if (tsens_version(priv) < VER_0_1) {
>                         /* Constraint: There is only 1 interrupt control register for all
> --
> 2.34.1
>