linux-kernel - Re: [PATCH 3/6] pci:host: Add Altera PCIe host controller driver

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Message-ID: <CAFiDJ5-=_5MJU7a8LofX=V2L1fkY2+2PemsaTPWyGBge7ReqHw@mail.gmail.com>
Date:	Thu, 30 Jul 2015 01:51:17 +0800
From:	Ley Foon Tan <lftan@...era.com>
To:	Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	Dinh Nguyen <dinguyen@...nsource.altera.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH 3/6] pci:host: Add Altera PCIe host controller driver

On Wed, Jul 29, 2015 at 9:19 PM, Lorenzo Pieralisi
<lorenzo.pieralisi@....com> wrote:
> On Tue, Jul 28, 2015 at 11:45:42AM +0100, Ley Foon Tan wrote:
>
> [...]
>
>> +static int altera_pcie_parse_request_of_pci_ranges(struct altera_pcie *pcie)
>> +{
>> +       int err, res_valid = 0;
>> +       struct device *dev = &pcie->pdev->dev;
>> +       struct device_node *np = dev->of_node;
>> +       resource_size_t iobase;
>> +       struct resource_entry *win;
>> +       int offset = 0;
>> +
>> +       err = of_pci_get_host_bridge_resources(np, 0, 0xff, &pcie->resources,
>> +                                              &iobase);
>> +       if (err)
>> +               return err;
>
> On top of Rob's comments on ARM bios32 dependency removal (ie rewrite
> the driver so that it does not use pci_common_init_dev()), if you need IO
> access you have to map iobase, see pci_remap_iospace() in pci-host-generic.c
Thanks. We doesn't support I/O region.

Regards
Ley Foon
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