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(-)