Qualcomm WCD9335 Codec is a standalone Hi-Fi audio codec IC. It is integrated in multiple Qualcomm SoCs like: MSM8996, MSM8976, and MSM8956 chipsets.
WCD9335 had multiple functional blocks, like: Soundwire controller, interrupt mux, pin controller, Audio codec, MBHC, MAD(Mic activity Detection), Ultrasonic proximity and pen detection, Battery-voltage monitoring and Codec processing engine.
Currently this patchset has been only tested with SLIMbus interface due to hardware avaiablity, but it can be easily made to work with both SLIMbus and I2C/I2S.
This patchset adds very basic playback and capture support witout much fancy features. New features will be added once the basic support is in. This patchset is tested on top of linux-next on DB820c for both playback and capture paths.
This patchset also depends on the SLIMbus Stream apis which is already merged via char-misc tree for 4.19.
Some parts of the code has been inherited from Qualcomm andriod kernel, so credits to various authors.
WCD9335 can be interfaced via I2S/I2C or SLIMbus.
Here is my test branch incase someone want to try this out: https://git.linaro.org/people/srinivas.kandagatla/linux.git/log/?h=wcd9335
Thanks, Srini
Srinivas Kandagatla (12): mfd: dt-bindings: Add wcd9335 mfd bindings mfd: wcd9335: add support to wcd9335 core mfd: wcd9335: add wcd irq support ASoC: dt-bindings: add dt bindings for wcd9335 audio codec ASoC: core: add support to snd_soc_dai_get_channel_map() ASoC: wcd9335: add support to wcd9335 codec ASoC: wcd9335: add CLASS-H Controller support ASoC: wcd9335: add basic controls ASoC: wcd9335: add playback dapm widgets ASoC: wcd9335: add capture dapm widgets ASoC: wcd9335: add audio routings ASoC: apq8096: Add support to Analog audio via WCD9335 slim
.../devicetree/bindings/mfd/qcom,wcd9335.txt | 130 + .../devicetree/bindings/sound/qcom,wcd9335.txt | 21 + drivers/mfd/Kconfig | 18 + drivers/mfd/Makefile | 4 + drivers/mfd/wcd9335-core.c | 278 ++ drivers/mfd/wcd9335-irq.c | 172 + include/dt-bindings/mfd/wcd9335.h | 43 + include/linux/mfd/wcd9335/registers.h | 580 +++ include/linux/mfd/wcd9335/wcd9335.h | 43 + include/sound/soc-dai.h | 8 + sound/soc/codecs/Kconfig | 5 + sound/soc/codecs/Makefile | 2 + sound/soc/codecs/wcd-clsh.c | 1010 ++++ sound/soc/codecs/wcd-clsh.h | 69 + sound/soc/codecs/wcd9335.c | 4981 ++++++++++++++++++++ sound/soc/qcom/apq8096.c | 68 + sound/soc/soc-core.c | 22 + 17 files changed, 7454 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/qcom,wcd9335.txt create mode 100644 Documentation/devicetree/bindings/sound/qcom,wcd9335.txt create mode 100644 drivers/mfd/wcd9335-core.c create mode 100644 drivers/mfd/wcd9335-irq.c create mode 100644 include/dt-bindings/mfd/wcd9335.h create mode 100644 include/linux/mfd/wcd9335/registers.h create mode 100644 include/linux/mfd/wcd9335/wcd9335.h create mode 100644 sound/soc/codecs/wcd-clsh.c create mode 100644 sound/soc/codecs/wcd-clsh.h create mode 100644 sound/soc/codecs/wcd9335.c