linux-kernel - Re: [PATCH pinctrl REGRESSION] Revert "pinctrl: mvebu: armada-37xx: use use platform api"

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Date:   Tue, 24 Mar 2020 13:20:17 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Marek Behún <marek.behun@....cz>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        Peng Fan <peng.fan@....com>
Subject: Re: [PATCH pinctrl REGRESSION] Revert "pinctrl: mvebu: armada-37xx:
 use use platform api"

On Tue, Mar 24, 2020 at 01:44:13AM +0100, Marek Behún wrote:
> This reverts commit 06e26b75f5e613b400116fdb7ff6206a681ab271.
> 
> This commit caused a regression on Armada 37xx. The pinctrl driver says
>   armada-37xx-pinctrl d0013800.pinctrl: invalid or no IRQ
>   armada-37xx-pinctrl d0018800.pinctrl: invalid or no IRQ
> and afterwards other drivers cannot use GPIOs by this driver as IRQs.
> 
> Fixes: 06e26b75f5e6 ("pinctrl: mvebu: armada-37xx: use use platform...")
> Signed-off-by: Marek Behún <marek.behun@....cz>
> Cc: Peng Fan <peng.fan@....com>
> ---
>  drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 12 +++---------
>  1 file changed, 3 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
> index 32f12a388b3c..5f125bd6279d 100644
> --- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
> +++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
> @@ -15,6 +15,7 @@
>  #include <linux/of.h>
>  #include <linux/of_address.h>
>  #include <linux/of_device.h>
> +#include <linux/of_irq.h>
>  #include <linux/pinctrl/pinconf-generic.h>
>  #include <linux/pinctrl/pinconf.h>
>  #include <linux/pinctrl/pinctrl.h>
> @@ -741,14 +742,7 @@ static int armada_37xx_irqchip_register(struct platform_device *pdev,
>  		return ret;
>  	}
>  
> -	nr_irq_parent = platform_irq_count(pdev);

Hi Marek

Could you determine the value of nr_irq_parent(). Is it -EPROBE_DEFER?
This patch has removed the handling of that.

> -	if (nr_irq_parent < 0) {
> -		if (nr_irq_parent != -EPROBE_DEFER)
> -			dev_err(dev, "Couldn't determine irq count: %pe\n",
> -				ERR_PTR(nr_irq_parent));
> -		return nr_irq_parent;
> -	}

Thanks
	Andrew