Re: [PATCH 2/2] driver core: platform: provide devm_platform_iounremap_resource

[pierre kuo]

hi Greg:
> Why are you adding new functions but not actually calling them anywhere?

Below patch introduce a single helper, devm_platform_ioremap_resource,
which combines
platform_get_resource() and devm_ioremap_resource(). But there is no
single helper to release
those resources in driver removing stage.

https://lore.kernel.org/lkml/20190215152507.31066-2-brgl@xxxxxxxx/

That means driver owner still need to call below (*) and (**) for
releasing resource.
Therefore, this patch adds a single release helper that can be paired with
devm_platform_ioremap_resource.

Appreciate ur kind help,

foo_probe(pdev)
{
    iomem = devm_platform_ioremap_resource(pdev, 0);
    ....
}


foo_remove(pdev)
{
    devm_iounmap(iomem);   (*)
    devm_release_mem_region(dev, res->start, size); (**)
   ........................
}