linux-kernel - Re: [PATCH v1] usb: xhci: tegra: Check padctrl interrupt presence in device tree

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Date:   Thu, 21 Oct 2021 23:37:36 +0200
From:   Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Thierry Reding <treding@...dia.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mathias Nyman <mathias.nyman@...el.com>,
        JC Kuo <jckuo@...dia.com>, Nicolas Chauvet <kwizart@...il.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH v1] usb: xhci: tegra: Check padctrl interrupt presence in
 device tree

On Thu, Oct 21, 2021 at 02:55:01PM +0300, Dmitry Osipenko wrote:
> Older device-trees don't specify padctrl interrupt and xhci-tegra driver
> now fails to probe with -EINVAL using those device-trees. Check interrupt
> presence and disallow runtime PM suspension if it's missing to fix the
> trouble.
[...]
> --- a/drivers/usb/host/xhci-tegra.c
> +++ b/drivers/usb/host/xhci-tegra.c
> @@ -1454,10 +1454,13 @@ static int tegra_xusb_probe(struct platform_device *pdev)
>  		goto put_padctl;
>  	}
>  
> -	tegra->padctl_irq = of_irq_get(np, 0);
> -	if (tegra->padctl_irq <= 0) {
> -		err = (tegra->padctl_irq == 0) ? -ENODEV : tegra->padctl_irq;
> -		goto put_padctl;
> +	/* Older device-trees don't specify padctrl interrupt */
> +	if (of_property_read_bool(np, "interrupts")) {

Does this catch "interrupts-extended"?

> +		tegra->padctl_irq = of_irq_get(np, 0);
> +		if (tegra->padctl_irq <= 0) {
> +			err = (tegra->padctl_irq == 0) ? -ENODEV : tegra->padctl_irq;
> +			goto put_padctl;
> +		}

Best Regards
Michał Mirosław