Re: [PATCH 01/10] leds: pca953x: Use of_device_get_match_data()

From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Stephen Boyd <swboyd@chromium.org>, Wolfram Sang <wsa@the-dreams.de>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Arnd Bergmann <arnd@arndb.de>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Riku Voipio <riku.voipio@iki.fi>,
	Rob Herring <robh+dt@kernel.org>,
	Frank Rowand <frowand.list@gmail.com>,
	Jacek Anaszewski <jacek.anaszewski@gmail.com>,
	Pavel Machek <pavel@ucw.cz>, Dan Murphy <dmurphy@ti.com>,
	Linux LED Subsystem <linux-leds@vger.kernel.org>
Subject: Re: [PATCH 01/10] leds: pca953x: Use of_device_get_match_data()
Date: Mon, 14 Oct 2019 20:50:06 +0300	[thread overview]
Message-ID: <CAHp75Vebn48hbzqKWzV3aj4NEBCta_Fn7zOQHzsznW4=6cXLsQ@mail.gmail.com> (raw)
In-Reply-To: <20191004214334.149976-2-swboyd@chromium.org>

On Sat, Oct 5, 2019 at 12:47 AM Stephen Boyd <swboyd@chromium.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