Re: [PATCH 1/2] [RESEND] of: provide of_n_{addr,size}_cells wrappers for !CONFIG_OF

From: Rob Herring
Date: Mon Sep 18 2017 - 17:28:34 EST

On Mon, Sep 11, 2017 at 3:07 PM, Arnd Bergmann <arnd@xxxxxxxx> wrote:
> The pci-rcar driver is enabled for compile tests, and this has
> shown that the driver cannot build without CONFIG_OF,
> following the inclusion of f8f2fe7355fb "PCI: rcar: Use new OF
> interrupt mapping when possible":
> drivers/pci/host/pcie-rcar.c: In function 'pci_dma_range_parser_init':
> drivers/pci/host/pcie-rcar.c:1039:2: error: implicit declaration of function 'of_n_addr_cells' [-Werror=implicit-function-declaration]
> parser->pna = of_n_addr_cells(node);
> ^
> As pointed out by Ben Dooks and Geert Uytterhoeven, this is actually
> supposed to build fine, which we can achieve if we make the
> declaration of of_irq_parse_and_map_pci conditional on CONFIG_OF
> and provide an empty inline function otherwise, as we do for
> a lot of other of interfaces.
> This lets us build the rcar_pci driver again without CONFIG_OF
> for build testing. All platforms using this driver select OF,
> so this doesn't change anything for the users.

Sorry, I keep missing this. It's a flaw in my mail filtering...

There's a patch series[1] to factor out pci_dma_range_parser_init of
the driver which should also fix this. I'd prefer not to take this
because ideally all address parsing should be within the DT core code.