linux-kernel - Re: [PATCH] RISC-V: defconfig: Enable Generic PCIE by default

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Message-ID: <alpine.DEB.2.21.9999.1812211433290.777@viisi.sifive.com>
Date:   Fri, 21 Dec 2018 14:34:15 -0800 (PST)
From:   Paul Walmsley <paul.walmsley@...ive.com>
To:     Alistair Francis <Alistair.Francis@....com>
cc:     "paul.walmsley@...ive.com" <paul.walmsley@...ive.com>,
        "palmer@...ive.com" <palmer@...ive.com>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] RISC-V: defconfig: Enable Generic PCIE by default



On Fri, 21 Dec 2018, Alistair Francis wrote:

> On Fri, 2018-12-21 at 11:27 -0800, Paul Walmsley wrote:
> > On Fri, 21 Dec 2018, Alistair Francis wrote:
> > 
> > > When the MicroSemi driver does eventually go upstream this will
> > > probably have to be discussed though as either the config or device
> > > tree will need to be edited to ensure only one PCIe device is
> > > present.
> > 
> > The right way to do that is to have two separate DT files: one for the 
> > HiFive-U board alone; the other for the HiFive-U plus the expansion 
> > board combo.  There shouldn't be any problems with keeping both 
> > drivers enabled in the defconfig.
> 
> Agreed, the only problem is that the device tree comes from the boards
> firmware at the moment.

The switchover is in progress:

https://lore.kernel.org/linux-riscv/41dac7a1-3f66-6a3f-8a68-206688e5bd9e@sifive.com/T/#t


- Paul