linux-kernel - Re: [PATCH] pci-imx6: replacing legacy gpio interface for gpiod

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Message-ID: <CAH7FV3nsOsJDKf9td1Gk-bf0w1jengDnD-K9NrghHw4iQenh9Q@mail.gmail.com>
Date:   Wed, 20 Oct 2021 09:02:52 -0300
From:   Maíra Canal <maira.canal@....br>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     hongxing.zhu@....com, l.stach@...gutronix.de,
        lorenzo.pieralisi@....com, robh@...nel.org, kw@...ux.com,
        Bjorn Helgaas <bhelgaas@...gle.com>, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com, linux-pci@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pci-imx6: replacing legacy gpio interface for gpiod

I'm sorry about the commit log. I made an effort to do a better commit
log on v2 and sent the new version on the mailing list. Thanks for
reviewing the entry!


Em ter., 19 de out. de 2021 às 16:45, Bjorn Helgaas
<helgaas@...nel.org> escreveu:
>
> [fixed "linux-pci@...r.kernel.org" in cc]
>
> On Tue, Oct 19, 2021 at 12:26:53PM -0300, Maíra Canal wrote:
> > Removing all dependencies of linux/gpio.h and linux/of_gpio.h and replacing
> > it with linux/gpio/consumer.h
>
> Run "git log --oneline drivers/pci/controller/dwc/pci-imx6.c" and make
> your subject line match -- capitalization, sentence structure, etc.
>
> Write commit log in imperative mood, i.e., "Remove" instead of
> "Removing": https://chris.beams.io/posts/git-commit/
>
> The commit log mentions the trivial part but omits the important part
> (converting from gpio to gpiod model).
>
> > Signed-off-by: Maíra Canal <maira.canal@....br>
> > ---
> >  drivers/pci/controller/dwc/pci-imx6.c | 31 ++++++++++-----------------
> >  1 file changed, 11 insertions(+), 20 deletions(-)
> >
> > diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> > index 80fc98acf097..e5ee54e37d05 100644
> > --- a/drivers/pci/controller/dwc/pci-imx6.c
> > +++ b/drivers/pci/controller/dwc/pci-imx6.c
> > @@ -11,13 +11,12 @@
> >  #include <linux/bitfield.h>
> >  #include <linux/clk.h>
> >  #include <linux/delay.h>
> > -#include <linux/gpio.h>
> > +#include <linux/gpio/consumer.h>
> >  #include <linux/kernel.h>
> >  #include <linux/mfd/syscon.h>
> >  #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
> >  #include <linux/mfd/syscon/imx7-iomuxc-gpr.h>
> >  #include <linux/module.h>
> > -#include <linux/of_gpio.h>
> >  #include <linux/of_device.h>
> >  #include <linux/of_address.h>
> >  #include <linux/pci.h>
> > @@ -63,7 +62,7 @@ struct imx6_pcie_drvdata {
> >
> >  struct imx6_pcie {
> >       struct dw_pcie          *pci;
> > -     int                     reset_gpio;
> > +     struct gpio_desc    *reset_gpio;
> >       bool                    gpio_active_high;
> >       struct clk              *pcie_bus;
> >       struct clk              *pcie_phy;
> > @@ -526,11 +525,11 @@ static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
> >       usleep_range(200, 500);
> >
> >       /* Some boards don't have PCIe reset GPIO. */
> > -     if (gpio_is_valid(imx6_pcie->reset_gpio)) {
> > -             gpio_set_value_cansleep(imx6_pcie->reset_gpio,
> > +     if (imx6_pcie->reset_gpio) {
> > +             gpiod_set_value_cansleep(imx6_pcie->reset_gpio,
> >                                       imx6_pcie->gpio_active_high);
> >               msleep(100);
> > -             gpio_set_value_cansleep(imx6_pcie->reset_gpio,
> > +             gpiod_set_value_cansleep(imx6_pcie->reset_gpio,
> >                                       !imx6_pcie->gpio_active_high);
> >       }
> >
> > @@ -1025,22 +1024,14 @@ static int imx6_pcie_probe(struct platform_device *pdev)
> >               return PTR_ERR(pci->dbi_base);
> >
> >       /* Fetch GPIOs */
> > -     imx6_pcie->reset_gpio = of_get_named_gpio(node, "reset-gpio", 0);
> >       imx6_pcie->gpio_active_high = of_property_read_bool(node,
> >                                               "reset-gpio-active-high");
> > -     if (gpio_is_valid(imx6_pcie->reset_gpio)) {
> > -             ret = devm_gpio_request_one(dev, imx6_pcie->reset_gpio,
> > -                             imx6_pcie->gpio_active_high ?
> > -                                     GPIOF_OUT_INIT_HIGH :
> > -                                     GPIOF_OUT_INIT_LOW,
> > -                             "PCIe reset");
> > -             if (ret) {
> > -                     dev_err(dev, "unable to get reset gpio\n");
> > -                     return ret;
> > -             }
> > -     } else if (imx6_pcie->reset_gpio == -EPROBE_DEFER) {
> > -             return imx6_pcie->reset_gpio;
> > -     }
> > +     imx6_pcie->reset_gpio = devm_gpiod_get_optional(dev, "reset",
> > +                     imx6_pcie->gpio_active_high ?  GPIOD_OUT_HIGH :
> > +                             GPIOD_OUT_LOW);
> > +     if (IS_ERR(imx6_pcie->reset_gpio))
> > +             return dev_err_probe(dev, PTR_ERR(imx6_pcie->reset_gpio),
> > +                                       "unable to get reset gpio\n");
> >
> >       /* Fetch clocks */
> >       imx6_pcie->pcie_phy = devm_clk_get(dev, "pcie_phy");
> > --
> > 2.31.1
> >