linux-kernel - Re: [PATCH v9 5/5] usb: dwc3: core: cleanup IRQ resources

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Message-ID: <575A7B0C.40103@ti.com>
Date:	Fri, 10 Jun 2016 11:32:12 +0300
From:	Roger Quadros <rogerq@...com>
To:	Felipe Balbi <balbi@...nel.org>,
	Grygorii Strashko <grygorii.strashko@...com>
CC:	<tony@...mide.com>, <Joao.Pinto@...opsys.com>,
	<sergei.shtylyov@...entembedded.com>, <peter.chen@...escale.com>,
	<jun.li@...escale.com>, <yoshihiro.shimoda.uh@...esas.com>,
	<nsekhar@...com>, <b-liu@...com>, <linux-usb@...r.kernel.org>,
	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v9 5/5] usb: dwc3: core: cleanup IRQ resources

On 10/06/16 11:18, Felipe Balbi wrote:
> 
> Hi,
> 
> Roger Quadros <rogerq@...com> writes:
>>> 	dwc->xhci_resource[1] = *res;
>>
>> Probably not as we don't want to change parent/child members.
> 
> oh, you had already replied. Sorry. This is correct
> 
np :).

So what i'll do is get the irq via platform_get_irq() and friends
and if it was a success use platform_get_resource() and friends
to get struct resource and just edit the relevant parts for the
XHCI irq resource.

Sounds OK?

something like this.

+	int			ret, irq;
+	struct resource		*res;
+	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);
+
+	irq = platform_get_irq_byname(dwc3_pdev, "host");
+	if (irq == -EPROBE_DEFER)
+		return irq;
+
+	if (irq <= 0) {
+		irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3");
+		if (irq == -EPROBE_DEFER)
+			return irq;
+
+		if (irq <= 0) {
+			irq = platform_get_irq(dwc3_pdev, 0);
+			if (irq <= 0) {
+				if (irq != -EPROBE_DEFER) {
+					dev_err(dwc->dev,
+						"missing host IRQ\n");
+				}
+				return irq;
+			} else {
+				res = platform_get_resource(dwc3_pdev,
+							    IORESOURCE_IRQ, 0);
+			}
+		} else {
+			res = platform_get_resource_byname(dwc3_pdev,
+							   IORESOURCE_IRQ,
+							   "dwc_usb3");
+		}
+
+	} else {
+		res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
+						   "host");
+	}
+
+	dwc->xhci_resources[1].start = irq;
+	dwc->xhci_resources[1].end = irq;
+	dwc->xhci_resources[1].flags = res->flags;
+	dwc->xhci_resources[1].name = res->name;
 


--
cheers,
-roger



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