From: Kenneth Westfield kwestfie@codeaurora.org
This set of patches adds support for audio on the Qualcomm Technologies ipq806x SOC.
The ipq806x SOC has audio-related hardware blocks in its low-power audio subsystem (or LPASS). One of the relevant blocks in the LPASS is its low-power audio interface (or LPAIF). This encapsulates the MI2S port, which is what these drivers are configured to use. The I2S pins are connected to an external DAC/amp chip. In addition, a single GPIO is connected to the same DAC/amp, which gives the SOC enable/disable control.
The specific drivers added are: - a Codec DAI driver that controls the SOC external pins - a CPU DAI driver for controlling the LPASS-LPAIF block - a PCM MI2S platform driver - a machine driver that ties the three drivers together
Corresponding additions to the device tree for the ipq806x and its documentation has also been added. Also, as this is a new directory, the MAINTAINERS file has been updated as well.
== Updates from my previous post:
[PATCH 00/9] ASoC: QCOM: Add support for ipq806x SOC http://thread.gmane.org/gmane.linux.ports.arm.msm/10701
- remove the native LPAIF driver, and move its functionality to the CPU DAI driver - add a codec driver to manage the pins going to the external DAC (previously managed by the machine driver) - use devm_* and dev_* where possible - ISR only handles relevant DMA channel now - update device tree documentation to reflect changes - general code cleanup
== Additional patch series upon which this patch series has device-tree dependencies (lcc)
[PATCH v2 0/8] qcom audio clock control drivers http://thread.gmane.org/gmane.linux.ports.arm.msm/10793
Kenneth Westfield (11): MAINTAINERS: Add QCOM audio ASoC maintainer ASoC: qcom: Add device tree binding docs ASoC: ipq806x: add LPAIF header file ASoC: codec: Add Maxim codec driver ASoC: ipq806x: Add LPASS CPU DAI driver ASoC: ipq806x: Add I2S PCM platform driver ASoC: ipq806x: Add machine driver for IPQ806X SOC ASoC: codec: Add ability to build QCOM codec ASoC: qcom: Add ability to build QCOM drivers ASoC: Allow for building QCOM drivers ARM: dts: Model IPQ LPASS audio hardware
.../bindings/sound/qcom,ipq806x-snd-card.txt | 25 ++ .../bindings/sound/qcom,lpass-cpu-dai.txt | 32 ++ .../bindings/sound/qcom,lpass-pcm-mi2s.txt | 12 + .../bindings/sound/qcom,max98357a-codec.txt | 23 ++ MAINTAINERS | 7 + arch/arm/boot/dts/qcom-ipq8064.dtsi | 33 ++ sound/soc/Kconfig | 1 + sound/soc/Makefile | 1 + sound/soc/codecs/Kconfig | 4 + sound/soc/codecs/Makefile | 2 + sound/soc/codecs/max98357a.c | 267 ++++++++++++ sound/soc/qcom/Kconfig | 25 ++ sound/soc/qcom/Makefile | 11 + sound/soc/qcom/ipq806x.c | 127 ++++++ sound/soc/qcom/lpass-cpu-mi2s.c | 374 +++++++++++++++++ sound/soc/qcom/lpass-cpu-mi2s.h | 48 +++ sound/soc/qcom/lpass-lpaif.h | 154 +++++++ sound/soc/qcom/lpass-pcm-mi2s.c | 452 +++++++++++++++++++++ 18 files changed, 1598 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/qcom,ipq806x-snd-card.txt create mode 100644 Documentation/devicetree/bindings/sound/qcom,lpass-cpu-dai.txt create mode 100644 Documentation/devicetree/bindings/sound/qcom,lpass-pcm-mi2s.txt create mode 100644 Documentation/devicetree/bindings/sound/qcom,max98357a-codec.txt create mode 100644 sound/soc/codecs/max98357a.c create mode 100644 sound/soc/qcom/Kconfig create mode 100644 sound/soc/qcom/Makefile create mode 100644 sound/soc/qcom/ipq806x.c create mode 100644 sound/soc/qcom/lpass-cpu-mi2s.c create mode 100644 sound/soc/qcom/lpass-cpu-mi2s.h create mode 100644 sound/soc/qcom/lpass-lpaif.h create mode 100644 sound/soc/qcom/lpass-pcm-mi2s.c