From: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> SLIMbus (Serial Low Power Interchip Media Bus) is a specification developed by MIPI (Mobile Industry Processor Interface) alliance. SLIMbus is a 2-wire implementation, which is used to communicate with peripheral components like audio-codec. SLIMbus uses Time-Division-Multiplexing to accommodate multiple data channels, and control channel. Control channel has messages to do device-enumeration, messages to send/receive control-data to/from SLIMbus devices, messages for port/channel management, and messages to do bandwidth allocation. Framework is introduced to support multiple instances of the bus (1 controller per bus), and multiple slave devices per controller. SPI and I2C frameworks, and comments from last time when I submitted the patches were referred-to while working on this framework. These patchsets introduce device-management, OF helpers, and messaging APIs, controller driver for Qualcomm's SLIMbus controller, and clock-pause feature for entering/exiting low-power mode for SLIMbus. Framework patches to do channel, port and bandwidth management are work-in-progress and will be sent out once these initial patches are accepted. These patchsets were tested on IFC6410 board with Qualcomm APQ8064 processor using the controller driver, and a WCD9310 codec. v9: https://lkml.org/lkml/2017/12/7/289 Changes from v9 to v10: * Added kernel-doc reference into slimbus driver api doc suggested by Jonathan Corbet Sagar Dharia (9): Documentation: Add SLIMbus summary dt-bindings: Add SLIMbus bindings slimbus: Add SLIMbus bus type slimbus: core: Add slim controllers support slimbus: Add messaging APIs to slimbus framework slimbus: Add support for 'clock-pause' feature dt-bindings: Add qcom slimbus controller bindings slimbus: qcom: Add Qualcomm Slimbus controller driver slimbus: qcom: Add runtime-pm support using clock-pause Srinivas Kandagatla (4): slimbus: core: add support to device tree helper regmap: add SLIMbus support slimbus: core: add common defines required for controllers MAINTAINERS: Add SLIMbus maintainer Documentation/devicetree/bindings/slimbus/bus.txt | 50 ++ .../devicetree/bindings/slimbus/slim-qcom-ctrl.txt | 39 ++ Documentation/driver-api/index.rst | 1 + Documentation/driver-api/slimbus.rst | 127 ++++ MAINTAINERS | 8 + drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/base/regmap/Kconfig | 4 + drivers/base/regmap/Makefile | 1 + drivers/base/regmap/regmap-slimbus.c | 80 +++ drivers/slimbus/Kconfig | 23 + drivers/slimbus/Makefile | 10 + drivers/slimbus/core.c | 480 +++++++++++++ drivers/slimbus/messaging.c | 330 +++++++++ drivers/slimbus/qcom-ctrl.c | 750 +++++++++++++++++++++ drivers/slimbus/sched.c | 121 ++++ drivers/slimbus/slimbus.h | 261 +++++++ include/linux/mod_devicetable.h | 13 + include/linux/regmap.h | 18 + include/linux/slimbus.h | 164 +++++ 20 files changed, 2483 insertions(+) create mode 100644 Documentation/devicetree/bindings/slimbus/bus.txt create mode 100644 Documentation/devicetree/bindings/slimbus/slim-qcom-ctrl.txt create mode 100644 Documentation/driver-api/slimbus.rst create mode 100644 drivers/base/regmap/regmap-slimbus.c create mode 100644 drivers/slimbus/Kconfig create mode 100644 drivers/slimbus/Makefile create mode 100644 drivers/slimbus/core.c create mode 100644 drivers/slimbus/messaging.c create mode 100644 drivers/slimbus/qcom-ctrl.c create mode 100644 drivers/slimbus/sched.c create mode 100644 drivers/slimbus/slimbus.h create mode 100644 include/linux/slimbus.h -- 2.15.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
