Subject: Re: [PATCH 4/5] net: mvmdio: allow Device Tree and platform device to coexist

From: Jason Gunthorpe <[email-masked]>
Date: Tue, 29 Jan 2013 10:59:12 -0700

On Tue, Jan 29, 2013 at 04:24:07PM +0100, Florian Fainelli wrote:
  
> -	dev->err_interrupt = irq_of_parse_and_map(pdev->dev.of_node, 0);
> +	if (pdev->dev.of_node) {
> +		dev->regs = of_iomap(pdev->dev.of_node, 0);
> +		if (!dev->regs) {
> +			dev_err(&pdev->dev, "No SMI register address given in DT\n");
> +			ret = -ENODEV;
> +			goto out_free;
> +		}
> +
> +		dev->err_interrupt = irq_of_parse_and_map(pdev->dev.of_node, 0);
> +	} else {
> +		r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +
> +		dev->regs = ioremap(r->start, resource_size(r));
> +		if (!dev->regs) {
> +			dev_err(&pdev->dev, "No SMI register address given\n");
> +			ret = -ENODEV;
> +			goto out_free;
> +		}
> +
> +		dev->err_interrupt = platform_get_irq(pdev, 0);
> +	}

Why do you have these different paths for OF and platform? AFAIK these
days when a OF device is automatically converted into a platform
device all the struct resources are created too, so you can't you just
use platform_get_resource and devm_request_and_ioremap for both flows?

Ditto for the interrupt - platform_get_irq should work in both cases?

Jason