platform_get_irq: Revert to platform_get_resource if of_irq_get fails
Commits9ec36ca
(of/irq: do irq resolution in platform_get_irq) andad69674
(of/irq: do irq resolution in platform_get_irq_byname) change the semantics of platform_get_irq and platform_get_irq_byname to always rely on devicetree information if devicetree is enabled and if a devicetree node is attached to the device. The functions now return an error if the devicetree data does not include interrupt information, even if the information is available as platform resource data. This causes mfd client drivers to fail if the interrupt number is passed via platform resources. Therefore, if of_irq_get fails, try platform_get_resource as method of last resort. This restores the original functionality for drivers depending on platform resources to get irq information. Cc: Russell King <linux@arm.linux.org.uk> Cc: Tony Lindgren <tony@atomide.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Rob Herring <robh@kernel.org> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -89,8 +89,13 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
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return dev->archdata.irqs[num];
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#else
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struct resource *r;
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if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node)
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return of_irq_get(dev->dev.of_node, num);
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if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) {
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int ret;
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ret = of_irq_get(dev->dev.of_node, num);
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if (ret >= 0 || ret == -EPROBE_DEFER)
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return ret;
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}
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r = platform_get_resource(dev, IORESOURCE_IRQ, num);
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@ -133,8 +138,13 @@ int platform_get_irq_byname(struct platform_device *dev, const char *name)
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{
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struct resource *r;
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if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node)
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return of_irq_get_byname(dev->dev.of_node, name);
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if (IS_ENABLED(CONFIG_OF_IRQ) && dev->dev.of_node) {
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int ret;
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ret = of_irq_get_byname(dev->dev.of_node, name);
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if (ret >= 0 || ret == -EPROBE_DEFER)
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return ret;
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}
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r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name);
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return r ? r->start : -ENXIO;
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