linux-kernel - [PATCH v3 0/2] Add Cadence I2S-MC controller driver

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Date: Wed,  8 May 2024 15:04:04 +0800
From: Xingyu Wu <xingyu.wu@...rfivetech.com>
To: Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Claudiu Beznea <Claudiu.Beznea@...rochip.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor.dooley@...rochip.com>
Cc: Xingyu Wu <xingyu.wu@...rfivetech.com>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org,
	linux-sound@...r.kernel.org
Subject: [PATCH v3 0/2] Add Cadence I2S-MC controller driver

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@starfivetech.com/

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@starfivetech.com/

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