linux-kernel - Re: [PATCH v2 10/10] PCIe: qcom: add Force GEN1 support

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Message-ID: <20200414170921.GB11622@bogus>
Date:   Tue, 14 Apr 2020 12:09:21 -0500
From:   Rob Herring <robh@...nel.org>
To:     Stanimir Varbanov <svarbanov@...sol.com>
Cc:     Ansuel Smith <ansuelsmth@...il.com>,
        Andy Gross <agross@...nel.org>,
        Sham Muthayyan <smuthayy@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <amurray@...goodpenguin.co.uk>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 10/10] PCIe: qcom: add Force GEN1 support

On Fri, Apr 03, 2020 at 12:01:01PM +0300, Stanimir Varbanov wrote:
> Hi Ansuel,
> 
> On 4/2/20 3:11 PM, Ansuel Smith wrote:
> > From: Sham Muthayyan <smuthayy@...eaurora.org>
> > 
> > Add Force GEN1 support needed in some ipq806x board
> > that needs to limit some pcie line to gen1 for some
> > hardware limitation.
> > This is set by the max-link-speed dts entry and needed
> > by some soc based on ipq806x. (for example Netgear R7800
> > router)
> > 
> > Signed-off-by: Sham Muthayyan <smuthayy@...eaurora.org>
> > Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> > ---
> >  drivers/pci/controller/dwc/pcie-qcom.c | 13 +++++++++++++
> >  1 file changed, 13 insertions(+)
> > 
> > diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> > index 8047ac7dc8c7..2212e9498b91 100644
> > --- a/drivers/pci/controller/dwc/pcie-qcom.c
> > +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> > @@ -27,6 +27,7 @@
> >  #include <linux/slab.h>
> >  #include <linux/types.h>
> >  
> > +#include "../../pci.h"
> 
> This looks suspiciously (even ugly), but I saw that the other users of
> of_pci_get_max_link_speed is doing the same.
> 
> Bjorn H. : do you know why the prototype is there? Perhaps it must be in
> linux/of_pci.h.

No, because the function should not be used outside of drivers/pci/.

Rob