linux-kernel - Re: [PATCH v3] pinctrl: renesas: rzg2l: Configure the interrupt type on resume

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Message-ID: <941bca2c-3a70-4c57-9d47-8334c320e8ce@tuxon.dev>
Date: Fri, 19 Apr 2024 09:35:30 +0300
From: claudiu beznea <claudiu.beznea@...on.dev>
To: geert+renesas@...der.be, linus.walleij@...aro.org,
 biju.das.jz@...renesas.com, tglx@...utronix.de
Cc: linux-renesas-soc@...r.kernel.org, linux-gpio@...r.kernel.org,
 linux-kernel@...r.kernel.org,
 Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH v3] pinctrl: renesas: rzg2l: Configure the interrupt type
 on resume



On 19.04.2024 09:19, Claudiu wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> Commit dce0919c83c3 ("irqchip/renesas-rzg2l: Do not set TIEN and TINT
> source at the same time") removed the setup of TINT from
> rzg2l_irqc_irq_enable(). To address the spourious interrupt issue the setup
> of TINT has been moved in rzg2l_tint_set_edge() though
> rzg2l_disable_tint_and_set_tint_source(). With this, the interrupts are
> not properly re-configured after a suspend-to-RAM cycle. To address
> this issue and avoid spurious interrupts while resumming set the
> interrupt type before enabling it.
> 
> Fixes: dce0919c83c3 ("irqchip/renesas-rzg2l: Do not set TIEN and TINT source at the same time")
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> ---
> 
> Changes in v3:

I just noticed I used the wrong versioning here and in patch title. Sorry
for that. I'll send an update.

Please ignore this patch.

Thank you,
Claudiu Beznea

> - moved dev_crit() out of critical section
> 
> Changes in v2:
> - none; this patch was part of series at [1] and added in v2 of that
>   series
> 
> [1] https://lore.kernel.org/all/20240320104230.446400-1-claudiu.beznea.uj@bp.renesas.com/
> 
>  drivers/pinctrl/renesas/pinctrl-rzg2l.c | 23 +++++++++++++----------
>  1 file changed, 13 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> index 93916553bcc7..20425afc6b33 100644
> --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> @@ -2045,7 +2045,9 @@ static void rzg2l_gpio_irq_restore(struct rzg2l_pinctrl *pctrl)
>  
>  	for (unsigned int i = 0; i < RZG2L_TINT_MAX_INTERRUPT; i++) {
>  		struct irq_data *data;
> +		unsigned long flags;
>  		unsigned int virq;
> +		int ret;
>  
>  		if (!pctrl->hwirq[i])
>  			continue;
> @@ -2063,17 +2065,18 @@ static void rzg2l_gpio_irq_restore(struct rzg2l_pinctrl *pctrl)
>  			continue;
>  		}
>  
> -		if (!irqd_irq_disabled(data)) {
> -			unsigned long flags;
> -
> -			/*
> -			 * This has to be atomically executed to protect against a concurrent
> -			 * interrupt.
> -			 */
> -			raw_spin_lock_irqsave(&pctrl->lock.rlock, flags);
> +		/*
> +		 * This has to be atomically executed to protect against a concurrent
> +		 * interrupt.
> +		 */
> +		raw_spin_lock_irqsave(&pctrl->lock.rlock, flags);
> +		ret = rzg2l_gpio_irq_set_type(data, irqd_get_trigger_type(data));
> +		if (!ret && !irqd_irq_disabled(data))
>  			rzg2l_gpio_irq_enable(data);
> -			raw_spin_unlock_irqrestore(&pctrl->lock.rlock, flags);
> -		}
> +		raw_spin_unlock_irqrestore(&pctrl->lock.rlock, flags);
> +
> +		if (ret)
> +			dev_crit(pctrl->dev, "Failed to set IRQ type for virq=%u\n", virq);
>  	}
>  }
>