linux-kernel - Re: [PATCH v3 3/3] i2c: smbus: Use device_*() functions instead of of

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Message-ID: <CAHp75VcBPn=2EBNfwfs-V81PzT5vrYk5NNqpXnUeHeqcyP1sTg@mail.gmail.com>
Date:   Thu, 20 Jan 2022 17:05:13 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Akhil R <akhilrajeev@...dia.com>
Cc:     Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Christian Koenig <christian.koenig@....com>,
        Dmitry Osipenko <digetx@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jon Hunter <jonathanh@...dia.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Len Brown <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        linux-i2c <linux-i2c@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-tegra <linux-tegra@...r.kernel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Wolfram Sang <wsa@...nel.org>
Subject: Re: [PATCH v3 3/3] i2c: smbus: Use device_*() functions instead of of_*()

On Thu, Jan 20, 2022 at 3:45 PM Akhil R <akhilrajeev@...dia.com> wrote:
>
> Change of_*() functions to device_*() for firmware agnostic usage.
> This allows to have the smbus_alert interrupt without any changes
> in the controller drivers using the ACPI table.

This patch LGTM.
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

The 0 check needs a separate discussion and fixing, which is out of scope here.

> Signed-off-by: Akhil R <akhilrajeev@...dia.com>
> ---
>  drivers/i2c/i2c-core-base.c  |  2 +-
>  drivers/i2c/i2c-core-smbus.c | 10 +++++-----
>  drivers/i2c/i2c-smbus.c      |  2 +-
>  include/linux/i2c-smbus.h    |  6 +++---
>  4 files changed, 10 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
> index 2c59dd7..32a4526 100644
> --- a/drivers/i2c/i2c-core-base.c
> +++ b/drivers/i2c/i2c-core-base.c
> @@ -1479,7 +1479,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
>                 goto out_list;
>         }
>
> -       res = of_i2c_setup_smbus_alert(adap);
> +       res = i2c_setup_smbus_alert(adap);
>         if (res)
>                 goto out_reg;
>
> diff --git a/drivers/i2c/i2c-core-smbus.c b/drivers/i2c/i2c-core-smbus.c
> index e5b2d14..4c24c84 100644
> --- a/drivers/i2c/i2c-core-smbus.c
> +++ b/drivers/i2c/i2c-core-smbus.c
> @@ -701,13 +701,13 @@ struct i2c_client *i2c_new_smbus_alert_device(struct i2c_adapter *adapter,
>  }
>  EXPORT_SYMBOL_GPL(i2c_new_smbus_alert_device);
>
> -#if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_OF)
> -int of_i2c_setup_smbus_alert(struct i2c_adapter *adapter)
> +#if IS_ENABLED(CONFIG_I2C_SMBUS)
> +int i2c_setup_smbus_alert(struct i2c_adapter *adapter)
>  {
>         int irq;
>
> -       irq = of_property_match_string(adapter->dev.of_node, "interrupt-names",
> -                                      "smbus_alert");
> +       irq = device_property_match_string(adapter->dev.parent, "interrupt-names",
> +                                          "smbus_alert");
>         if (irq == -EINVAL || irq == -ENODATA)
>                 return 0;
>         else if (irq < 0)
> @@ -715,5 +715,5 @@ int of_i2c_setup_smbus_alert(struct i2c_adapter *adapter)
>
>         return PTR_ERR_OR_ZERO(i2c_new_smbus_alert_device(adapter, NULL));
>  }
> -EXPORT_SYMBOL_GPL(of_i2c_setup_smbus_alert);
> +EXPORT_SYMBOL_GPL(i2c_setup_smbus_alert);
>  #endif
> diff --git a/drivers/i2c/i2c-smbus.c b/drivers/i2c/i2c-smbus.c
> index d3d06e3..fdd6d97 100644
> --- a/drivers/i2c/i2c-smbus.c
> +++ b/drivers/i2c/i2c-smbus.c
> @@ -128,7 +128,7 @@ static int smbalert_probe(struct i2c_client *ara,
>         if (setup) {
>                 irq = setup->irq;
>         } else {
> -               irq = of_irq_get_byname(adapter->dev.of_node, "smbus_alert");
> +               irq = device_irq_get_byname(adapter->dev.parent, "smbus_alert");
>                 if (irq <= 0)
>                         return irq;
>         }
> diff --git a/include/linux/i2c-smbus.h b/include/linux/i2c-smbus.h
> index 1ef4218..95cf902 100644
> --- a/include/linux/i2c-smbus.h
> +++ b/include/linux/i2c-smbus.h
> @@ -30,10 +30,10 @@ struct i2c_client *i2c_new_smbus_alert_device(struct i2c_adapter *adapter,
>                                               struct i2c_smbus_alert_setup *setup);
>  int i2c_handle_smbus_alert(struct i2c_client *ara);
>
> -#if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_OF)
> -int of_i2c_setup_smbus_alert(struct i2c_adapter *adap);
> +#if IS_ENABLED(CONFIG_I2C_SMBUS)
> +int i2c_setup_smbus_alert(struct i2c_adapter *adap);
>  #else
> -static inline int of_i2c_setup_smbus_alert(struct i2c_adapter *adap)
> +static inline int i2c_setup_smbus_alert(struct i2c_adapter *adap)
>  {
>         return 0;
>  }
> --
> 2.7.4
>


-- 
With Best Regards,
Andy Shevchenko