linux-kernel - Re: [PATCH 01/10] leds: pca953x: Use of_device_get_match

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Date:   Mon, 14 Oct 2019 20:50:06 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Stephen Boyd <swboyd@...omium.org>,
        Wolfram Sang <wsa@...-dreams.de>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Riku Voipio <riku.voipio@....fi>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Pavel Machek <pavel@....cz>, Dan Murphy <dmurphy@...com>,
        Linux LED Subsystem <linux-leds@...r.kernel.org>
Subject: Re: [PATCH 01/10] leds: pca953x: Use of_device_get_match_data()

On Sat, Oct 5, 2019 at 12:47 AM Stephen Boyd <swboyd@...omium.org> wrote:
>
> This driver can use the of_device_get_match_data() API to simplify the
> code. Replace calls to of_match_device() with this newer API under the
> assumption that where it is called will be when we know the device is
> backed by a DT node. This nicely avoids referencing the match table when
> it is undefined with configurations where CONFIG_OF=n.

> +       devid = (int)(uintptr_t)of_device_get_match_data(dev);

> +               devid = (int)(uintptr_t)of_device_get_match_data(&client->dev);

This still leaves it OF-centric.
Better to use device_get_match_data().

Also, I'm thinking that following may help to clean a lot of the i2c
client drivers

static inline // perhaps no
const void *i2c_device_get_match_data(struct i2c_client *client, const
struct i2c_device_id *id)
{
  if (id)
    return (const void *)id->driver_data;
  return device_get_match_data(&client->dev);
}

-- 
With Best Regards,
Andy Shevchenko