ASoC: dt-bindings: add ESS Technology ES9039Q2M

Add a binding for the ES9039Q2M, a 32-bit two-channel audio DAC with an
asynchronous sample rate converter.

The part selects between two control personalities with its MODE pin:
hardware mode, strapped by HW0/HW1/HW2 with no control bus at all, and
software mode over I2C or SPI. This binding describes software mode over
I2C, which MODE = GND selects.

The four supply inputs are described and required. DVDD is not among
them: the part's 1.2V digital rail is generated on chip and the pin
takes only a decoupling capacitor. The datasheet asks for the supplies
in a set order - AVDD, then VCCA about 200us later, then the two
output-stage references, and the reverse on the way down - which the
description records, so a board with separately switchable rails has
it to hand.

Assisted-by: Claude:claude-opus-5
Signed-off-by: Karl Asseily <karl@asseily.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260918182317.143223-3-karl@asseily.com
Signed-off-by: Mark Brown <broonie@kernel.org>

0 files changed, 0 insertions, 0 deletions