From: Chen-Yu Tsai <wens@kernel.org>
To: Rob Herring <robh@kernel.org>
Cc: devicetree <devicetree@vger.kernel.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Heiko Stuebner <heiko@sntech.de>, PCI <linux-pci@vger.kernel.org>,
Shawn Lin <shawn.lin@rock-chips.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"open list:ARM/Rockchip SoC..."
<linux-rockchip@lists.infradead.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Johan Jonker <jbx6244@gmail.com>, Chen-Yu Tsai <wens@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v2 1/4] PCI: rockchip: Make 'ep-gpios' DT property optional
Date: Sat, 12 Dec 2020 23:18:17 +0800 [thread overview]
Message-ID: <CAGb2v6409SeptNUvMnpozriZ-L7iFCFFoG+=fJrtohxezDrEDQ@mail.gmail.com> (raw)
In-Reply-To: <CAL_JsqJphYYUsQR_kLH_y1gOArTifpEVUiTJfDpDsL8WjGxRfA@mail.gmail.com>
On Mon, Dec 7, 2020 at 10:11 PM Rob Herring <robh@kernel.org> wrote:
>
> On Wed, Nov 18, 2020 at 1:17 AM Chen-Yu Tsai <wens@kernel.org> wrote:
> >
> > From: Chen-Yu Tsai <wens@csie.org>
> >
> > The Rockchip PCIe controller DT binding clearly states that 'ep-gpios' is
> > an optional property. And indeed there are boards that don't require it.
> >
> > Make the driver follow the binding by using devm_gpiod_get_optional()
> > instead of devm_gpiod_get().
> >
> > Fixes: e77f847df54c ("PCI: rockchip: Add Rockchip PCIe controller support")
> > Fixes: 956cd99b35a8 ("PCI: rockchip: Separate common code from RC driver")
> > Fixes: 964bac9455be ("PCI: rockchip: Split out rockchip_pcie_parse_dt() to parse DT")
> > Signed-off-by: Chen-Yu Tsai <wens@csie.org>
> > ---
> > Changes since v1:
> >
> > - Rewrite subject to match existing convention and reference
> > 'ep-gpios' DT property instead of the 'ep_gpio' field
> > ---
> > drivers/pci/controller/pcie-rockchip.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controller/pcie-rockchip.c
> > index 904dec0d3a88..c95950e9004f 100644
> > --- a/drivers/pci/controller/pcie-rockchip.c
> > +++ b/drivers/pci/controller/pcie-rockchip.c
> > @@ -118,7 +118,7 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
> > }
> >
> > if (rockchip->is_rc) {
> > - rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
> > + rockchip->ep_gpio = devm_gpiod_get_optional(dev, "ep", GPIOD_OUT_HIGH);
> > if (IS_ERR(rockchip->ep_gpio)) {
> > dev_err(dev, "missing ep-gpios property in node\n");
>
> You should drop the error message. What it says is now never the
> reason for the error and it could most likely be a deferred probe
> which you don't want an error message for.
What about switching to dev_err_probe() instead?
That way deferred probe errors get silenced (or get a better debug message),
and error messages for other issues, such as miswritten gpio properties are
still produced.
ChenYu
> > return PTR_ERR(rockchip->ep_gpio);
> > --
> > 2.29.1
> >
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next prev parent reply other threads:[~2020-12-12 15:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-18 7:17 [PATCH v2 0/4] arm64: rockchip: Fix PCIe ep-gpios requirement and Add Nanopi M4B Chen-Yu Tsai
2020-11-18 7:17 ` [PATCH v2 1/4] PCI: rockchip: Make 'ep-gpios' DT property optional Chen-Yu Tsai
2020-11-18 8:49 ` Heiko Stübner
2020-12-07 3:30 ` Chen-Yu Tsai
2020-12-07 14:11 ` Rob Herring
2020-12-12 15:18 ` Chen-Yu Tsai [this message]
2020-12-14 14:17 ` Rob Herring
2020-11-18 7:17 ` [PATCH v2 2/4] dt-bindings: arm: rockchip: Add FriendlyARM NanoPi M4B Chen-Yu Tsai
2020-12-07 21:13 ` Rob Herring
2020-11-18 7:17 ` [PATCH v2 3/4] arm64: dts: rockchip: nanopi4: Move ep-gpios property to nanopc-t4 Chen-Yu Tsai
2020-12-14 15:18 ` Robin Murphy
2020-11-18 7:17 ` [PATCH v2 4/4] arm64: dts: rockchip: rk3399: Add NanoPi M4B Chen-Yu Tsai
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