The Hifiberry DAC+ / DAC+ PRO is supported in the Raspberry PI tree but until now not in the mainline and not for ACPI platforms.
This patchset implements the recommendations suggested by Mark Brown back in 2018: first add a gpiochip in the PCM512x codec driver, then use these gpios from a clock driver and the machine driver.
Since this patchset relies on different subsystems, sending as RFC for now. I chose to import the original code from the Raspberry PI tree as is, and add my changes on top. If there is a preference to squash the changes that'd be fine. I also don't know if I should split this series in two, one for ASoC and one for clk changes?
This patchset does not add changes to the sound/soc/bcm machine drivers, but that should be trivial once all the gpio/clock is available.
Thanks to Andy Shevchenko for his help navigating the gpio subsystem and flagging mistakes in the use of lookup tables, and to Rob Herring for pointers on the DT bindings verification tools.
Daniel Matuschek (1): clk: hifiberry-dacpro: initial import
Pierre-Louis Bossart (15): ASoC: pcm512x: expose 6 GPIOs ASoC: pcm512x: use "sclk" string to retrieve clock ASoC: Intel: sof-pcm512x: use gpiod for LED ASoC: Intel: sof-pcm512x: detect Hifiberry DAC+ PRO ASoC: Intel: sof-pcm512x: reconfigure sclk in hw_params if needed ASoC: Intel: sof-pcm512x: select HIFIBERRY_DACPRO clk clk: hifiberry-dacpro: update SDPX/copyright clk: hifiberry-dacpro: style cleanups, use devm_ clk: hifiberry-dacpro: add OF dependency clk: hifiberry-dacpro: transition to _hw functions clk: hifiberry-dacpro: add ACPI support clk: hifiberry-dacpro: add "sclk" lookup clk: hifiberry-dacpro: toggle GPIOs on prepare/unprepare clk: hifiberry-dacpro: add delay on clock prepare/deprepare ASoC: dt-bindings: add document for Hifiberry DAC+ PRO clock
.../bindings/sound/hifiberry-dacpro.yaml | 38 +++ drivers/clk/Kconfig | 4 + drivers/clk/Makefile | 1 + drivers/clk/clk-hifiberry-dacpro.c | 284 ++++++++++++++++++ sound/soc/codecs/pcm512x.c | 134 ++++++++- sound/soc/intel/boards/Kconfig | 2 + sound/soc/intel/boards/sof_pcm512x.c | 190 +++++++++++- 7 files changed, 635 insertions(+), 18 deletions(-) create mode 100644 Documentation/devicetree/bindings/sound/hifiberry-dacpro.yaml create mode 100644 drivers/clk/clk-hifiberry-dacpro.c
base-commit: dd8e871d4e560eeb8d22af82dde91457ad835a63