linux-kernel - [PATCH v1 0/2] Use ACPI_COMPANION macro to obtain acpi_device in cs35l41

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Message-ID: <20221124110718.3925934-1-sbinding@opensource.cirrus.com>
Date:   Thu, 24 Nov 2022 11:07:16 +0000
From:   Stefan Binding <sbinding@...nsource.cirrus.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <platform-driver-x86@...r.kernel.org>,
        <patches@...nsource.cirrus.com>,
        Stefan Binding <sbinding@...nsource.cirrus.com>
Subject: [PATCH v1 0/2] Use ACPI_COMPANION macro to obtain acpi_device in cs35l41_hda

Currently, in cs35l41_hda driver, we use acpi_dev_get_first_match_dev to obtain
the acpi_device used to obtain the properties and gpios.

It is better to use the ACPI_COMPANION macro to do this, since it guarentees
that we get the correct acpi_device for the device.

However, the cs35l41_hda driver uses the serial-multi-instantiate driver to
enumerate, and whilst the ACPI_CONPANION macro works with spi, it does not work
with i2c. This is fixed by setting the fwnode for i2c.

Stefan Binding (2):
  platform/x86: serial-multi-instantiate: Set fwnode for i2c
  ALSA: hda: cs35l41: Use ACPI_COMPANION to read acpi properties

 .../platform/x86/serial-multi-instantiate.c   |  1 +
 sound/pci/hda/cs35l41_hda.c                   | 50 ++++++++-----------
 2 files changed, 22 insertions(+), 29 deletions(-)

-- 
2.34.1