linux-kernel - Re: [PATCH v15 mfd 4/9] pinctrl: ocelot: add ability to be used in a non-mmio configuration

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Date:   Wed, 3 Aug 2022 13:32:15 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Colin Foster <colin.foster@...advantage.com>
Cc:     linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Terry Bowman <terry.bowman@....com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Wolfram Sang <wsa@...nel.org>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Steen Hegelund <Steen.Hegelund@...rochip.com>,
        Lars Povlsen <lars.povlsen@...rochip.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Russell King <linux@...linux.org.uk>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Lee Jones <lee.jones@...aro.org>, katie.morris@...advantage.com
Subject: Re: [PATCH v15 mfd 4/9] pinctrl: ocelot: add ability to be used in a
 non-mmio configuration

On Wed, Aug 3, 2022 at 7:47 AM Colin Foster
<colin.foster@...advantage.com> wrote:
>
> There are a few Ocelot chips that contain pinctrl logic, but can be
> controlled externally. Specifically the VSC7511, 7512, 7513 and 7514. In
> the externally controlled configurations these registers are not
> memory-mapped.
>
> Add support for these non-memory-mapped configurations.

FWIW,
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

> Signed-off-by: Colin Foster <colin.foster@...advantage.com>
> Reviewed-by: Vladimir Oltean <vladimir.oltean@....com>
> Acked-by: Linus Walleij <linus.walleij@...aro.org>
> ---
>
> (No changes since v14)
>
> v14
>     * Add Reviewed and Acked tags
>
> ---
>  drivers/pinctrl/pinctrl-ocelot.c | 16 +++++-----------
>  1 file changed, 5 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/pinctrl/pinctrl-ocelot.c b/drivers/pinctrl/pinctrl-ocelot.c
> index d18047d2306d..80a3bba520cb 100644
> --- a/drivers/pinctrl/pinctrl-ocelot.c
> +++ b/drivers/pinctrl/pinctrl-ocelot.c
> @@ -10,6 +10,7 @@
>  #include <linux/gpio/driver.h>
>  #include <linux/interrupt.h>
>  #include <linux/io.h>
> +#include <linux/mfd/ocelot.h>
>  #include <linux/of_device.h>
>  #include <linux/of_irq.h>
>  #include <linux/of_platform.h>
> @@ -1918,7 +1919,6 @@ static int ocelot_pinctrl_probe(struct platform_device *pdev)
>         struct ocelot_pinctrl *info;
>         struct reset_control *reset;
>         struct regmap *pincfg;
> -       void __iomem *base;
>         int ret;
>         struct regmap_config regmap_config = {
>                 .reg_bits = 32,
> @@ -1938,20 +1938,14 @@ static int ocelot_pinctrl_probe(struct platform_device *pdev)
>                                      "Failed to get reset\n");
>         reset_control_reset(reset);
>
> -       base = devm_ioremap_resource(dev,
> -                       platform_get_resource(pdev, IORESOURCE_MEM, 0));
> -       if (IS_ERR(base))
> -               return PTR_ERR(base);
> -
>         info->stride = 1 + (info->desc->npins - 1) / 32;
>
>         regmap_config.max_register = OCELOT_GPIO_SD_MAP * info->stride + 15 * 4;
>
> -       info->map = devm_regmap_init_mmio(dev, base, &regmap_config);
> -       if (IS_ERR(info->map)) {
> -               dev_err(dev, "Failed to create regmap\n");
> -               return PTR_ERR(info->map);
> -       }
> +       info->map = ocelot_regmap_from_resource(pdev, 0, &regmap_config);
> +       if (IS_ERR(info->map))
> +               return dev_err_probe(dev, PTR_ERR(info->map),
> +                                    "Failed to create regmap\n");
>         dev_set_drvdata(dev, info->map);
>         info->dev = dev;
>
> --
> 2.25.1
>


-- 
With Best Regards,
Andy Shevchenko