The Cadence Multi-channel I2S (I2S-MC) Controller implements a function of the multi-channel (up to 8-channel) bus. Each stereo channel combines functions of a transmitter and a receiver, and can switch freely between them. Each channel has independent gating, clock and interruption control. It also support some of these channels are used as playback and others can also be used as record in the same time. Four I2S controllers are used on the StarFive JH8100 SoC. Two of the I2S controllers use two stereo channels, one of them use four channels, and one use eight. It had tested on the fpga with WM8960 and PDM. Changes since v2: - Dropped the description of interrupts in bindings. - Modified the properties like 'compatible' and 'required'. - Defined the special property in top-level and made it false in other case in the bindings. - Added the test of other format in the driver. - Changed the return values and switch the TX and RX channels for convenience. - Modified the macros about 'SND_SOC_DAIFMT_CBM_CFM'. - Added pm_runtime_set_active() to fix the state of pm_runtime. v2: https://lore.kernel.org/all/20240320090239.168743-1-xingyu.wu@xxxxxxxxxxxxxxxx/ Changes since v1: - Added new compatible for StarFive JH8100 SoC and a special property to be got as the max channels number in the bindings. - Dropped the useless '|' in the bindings. - Moved the drivers to a new folder named 'cdns' and modified the name of functions. v1: https://lore.kernel.org/all/20231221033223.73201-1-xingyu.wu@xxxxxxxxxxxxxxxx/ Xingyu Wu (2): ASoC: dt-bindings: Add bindings for Cadence I2S-MC controller ASoC: cdns: Add drivers of Cadence Multi-Channel I2S Controller .../bindings/sound/cdns,i2s-mc.yaml | 109 +++ MAINTAINERS | 6 + sound/soc/Kconfig | 1 + sound/soc/Makefile | 1 + sound/soc/cdns/Kconfig | 18 + sound/soc/cdns/Makefile | 3 + sound/soc/cdns/cdns-i2s-mc-pcm.c | 285 +++++++ sound/soc/cdns/cdns-i2s-mc.c | 704 ++++++++++++++++++ sound/soc/cdns/cdns-i2s-mc.h | 151 ++++ 9 files changed, 1278 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/cdns,i2s-mc.yaml create mode 100644 sound/soc/cdns/Kconfig create mode 100644 sound/soc/cdns/Makefile create mode 100644 sound/soc/cdns/cdns-i2s-mc-pcm.c create mode 100644 sound/soc/cdns/cdns-i2s-mc.c create mode 100644 sound/soc/cdns/cdns-i2s-mc.h -- 2.25.1
