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 soon. These patchsets were tested on Qualcomm Snapdragon processor board using the controller driver, and a test slave device. Changes from V3 to V4: * Addressed inline-code review comments from Mark Brown and Rob Herring. * Use existing device-model to get list of children of the controller. * Use 4 cells to represent 4 components of the enumeration address. * Commit-text and comments to document performance arguments in using coherently mapped buffers for transaction buffer management. * Tried to address clock-pause management suggestion by making sure bus-framework votes/unvotes for runtime-PM while handling transfers. Sagar Dharia (6): SLIMbus: Device management on SLIMbus of/slimbus: OF helper for SLIMbus slimbus: Add messaging APIs to slimbus framework slim: qcom: Add Qualcomm Slimbus controller driver slimbus: Add support for 'clock-pause' feature slim: qcom: Add runtime-pm support using clock-pause feature Documentation/devicetree/bindings/slimbus/bus.txt | 54 ++ .../devicetree/bindings/slimbus/slim-qcom-ctrl.txt | 43 ++ Documentation/slimbus/summary | 109 +++ drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/slimbus/Kconfig | 21 + drivers/slimbus/Makefile | 5 + drivers/slimbus/slim-core.c | 852 +++++++++++++++++++++ drivers/slimbus/slim-messaging.c | 415 ++++++++++ drivers/slimbus/slim-qcom-ctrl.c | 678 ++++++++++++++++ drivers/slimbus/slim-qcom.h | 64 ++ drivers/slimbus/slim-sched.c | 122 +++ include/linux/mod_devicetable.h | 13 + include/linux/slimbus.h | 678 ++++++++++++++++ 14 files changed, 3057 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/slimbus/summary create mode 100644 drivers/slimbus/Kconfig create mode 100644 drivers/slimbus/Makefile create mode 100644 drivers/slimbus/slim-core.c create mode 100644 drivers/slimbus/slim-messaging.c create mode 100644 drivers/slimbus/slim-qcom-ctrl.c create mode 100644 drivers/slimbus/slim-qcom.h create mode 100644 drivers/slimbus/slim-sched.c create mode 100644 include/linux/slimbus.h -- 1.8.2.1 -- 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
