linux-kernel - Re: [PATCH] thermal/drivers/tsens: Add suspend to RAM support for tsens

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Date: Mon, 22 Jan 2024 15:32:44 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Priyansh Jain <quic_priyjain@...cinc.com>,
 Amit Kucheria <amitk@...nel.org>, Thara Gopinath <thara.gopinath@...il.com>,
 Bjorn Andersson <andersson@...nel.org>,
 "Rafael J . Wysocki" <rafael@...nel.org>,
 Daniel Lezcano <daniel.lezcano@...aro.org>, Zhang Rui <rui.zhang@...el.com>,
 Lukasz Luba <lukasz.luba@....com>, linux-pm@...r.kernel.org,
 linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: quic_manafm@...cinc.com
Subject: Re: [PATCH] thermal/drivers/tsens: Add suspend to RAM support for
 tsens

On 22.01.2024 11:07, Priyansh Jain wrote:
> Add suspend callback support for tsens which disables tsens interrupts
> in suspend to RAM callback.

Would it not be preferrable to have the "critical overheat", wakeup-
capable interrupts be enabled, even if the system is suspended?

> Add resume callback support for tsens which reinitializes tsens hardware
> and enables back tsens interrupts in resume callback.
> 
> Signed-off-by: Priyansh Jain <quic_priyjain@...cinc.com>
> ---

[...]

> +
> +int tsens_suspend_common(struct tsens_priv *priv)
> +{
> +	switch (pm_suspend_target_state) {
> +	case PM_SUSPEND_MEM:
> +		if (priv->combo_irq > 0) {
> +			disable_irq_nosync(priv->combo_irq);
> +			disable_irq_wake(priv->combo_irq);
> +		}
> +
> +		if (priv->uplow_irq > 0) {
> +			disable_irq_nosync(priv->uplow_irq);
> +			disable_irq_wake(priv->uplow_irq);
> +		}
> +
> +		if (priv->crit_irq > 0) {
> +			disable_irq_nosync(priv->crit_irq);
> +			disable_irq_wake(priv->crit_irq);
> +		}
> +		break;
> +	default:
> +		break;
> +	}

if (pm_suspend_target_state != PM_SUSPEND_MEM)
	return 0;

<rest of the code>

[...]

>  
> +	/* For saving irq number to re-use later */

This is rather self-explanatory

Konrad