linux-kernel - Re: [PATCH v1] pci: tegra: fix afi_pex2

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Date:   Tue, 07 Jan 2020 09:11:35 +0100
From:   Marcel Ziswiler <marcel@...wiler.com>
To:     Thierry Reding <treding@...dia.com>
Cc:     linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        Manikanta Maddireddy <mmaddireddy@...dia.com>,
        Andrew Murray <andrew.murray@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Thierry Reding <thierry.reding@...il.com>,
        linux-pci@...r.kernel.org
Subject: Re: [PATCH v1] pci: tegra: fix afi_pex2_ctrl reg offset for tegra30

Hi Thierry

On Thu, 2020-01-02 at 13:38 +0100, Thierry Reding wrote:
> On Mon, Dec 30, 2019 at 01:52:09AM +0100, Marcel Ziswiler wrote:
> > Fix AFI_PEX2_CTRL reg offset for tegra30 by moving it from the
> > tegra20
> > SoC struct where it erroneously got added by commit adb2653b3d2e
> > ("PCI: tegra: Add AFI_PEX2_CTRL reg offset as part of SoC struct").
> > This fixes the AFI_PEX2_CTRL reg offset being uninitialised
> > subsequently failing to bring up the third PCIe port.
> > 
> > Signed-off-by: Marcel Ziswiler <marcel@...wiler.com>
> > 
> > ---
> > 
> >  drivers/pci/controller/pci-tegra.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> Hi Marcel,
> 
> the recipient list looks somewhat odd. Mailing lists typically go
> into
> the Cc: line and subsystem maintainers into the To: line. That way
> you
> increase chances of people's filters catching important emails.

I'm using U-Boot's patman with the same LKML configuration since years
and nobody ever complained. I adjusted this now, thanks!

> You may also want to fix up the subject line to use the more standard
> "PCI: tegra: " prefix. Also, maybe capitalize "fix" -> "Fix" to match
> standard formatting rules for commit messages. In the subject and the
> commit message, also, please spell "tegra20" and "tegra30" as
> "Tegra20"
> and "Tegra30", which can help when searching logs.

While this whole capitalisation is utterly stupid and I remember in the
old days we kinda agreed to just lower case (don't know when/why this
suddenly changed) but this anyway should not matter if doing proper
case insensitive searching (;-p). Anyway, I will also adhere to this in
a v2, thanks!

> With the above fixed, this looks good, so:
> 
> Acked-by: Thierry Reding <treding@...dia.com>

Thanks, Thierry.

Cheers

Marcel

> > diff --git a/drivers/pci/controller/pci-tegra.c
> > b/drivers/pci/controller/pci-tegra.c
> > index 090b632965e2..ac93f5a0398e 100644
> > --- a/drivers/pci/controller/pci-tegra.c
> > +++ b/drivers/pci/controller/pci-tegra.c
> > @@ -2499,7 +2499,6 @@ static const struct tegra_pcie_soc
> > tegra20_pcie = {
> >  	.num_ports = 2,
> >  	.ports = tegra20_pcie_ports,
> >  	.msi_base_shift = 0,
> > -	.afi_pex2_ctrl = 0x128,
> >  	.pads_pll_ctl = PADS_PLL_CTL_TEGRA20,
> >  	.tx_ref_sel = PADS_PLL_CTL_TXCLKREF_DIV10,
> >  	.pads_refclk_cfg0 = 0xfa5cfa5c,
> > @@ -2528,6 +2527,7 @@ static const struct tegra_pcie_soc
> > tegra30_pcie = {
> >  	.num_ports = 3,
> >  	.ports = tegra30_pcie_ports,
> >  	.msi_base_shift = 8,
> > +	.afi_pex2_ctrl = 0x128,
> >  	.pads_pll_ctl = PADS_PLL_CTL_TEGRA30,
> >  	.tx_ref_sel = PADS_PLL_CTL_TXCLKREF_BUF_EN,
> >  	.pads_refclk_cfg0 = 0xfa5cfa5c,
> > -- 
> > 2.24.1