This patch: 1. adds a Fieldbus subsystem 2. adds support for the HMS Industrial Networks AB Profinet card. 1. Fieldbus subsystem --------------------- Fieldbus device (client) adapters allow data exchange with a PLC aka. "Fieldbus Controller" over a fieldbus (Profinet, FLNet, etc.) They are typically used when a Linux device wants to expose itself as an actuator, motor, console light, switch, etc. over the fieldbus. The framework is designed to provide a generic interface to Fieldbus Devices from both the Linux Kernel and the userspace. 2. Add support for HMS Profinet Card ------------------------------------ Profinet is an industry technical standard for data communication over Industrial Ethernet, designed for collecting data from, and controlling, equipment in industrial systems, with a particular strength in delivering data under tight time constraints (on the order of 1ms or less). The profinet card itself is connected to the system via an industrial bus called 'anybus'. I have followed the bus driver/client driver pattern, and created an anybus bus driver, plus a client driver for the profinet card. In case this patch set gets (eventually) accepted, drivers for other anybus client cards may follow: flnet, cc-link, ... The anybus slot on the host is located on an 'anybus bridge', which is custom h/w designed by arcx. Its driver is modeled as a misc device, which exposes a dual reset controller, plus a power readout unrelated to the anybus. v4: general create fieldbus_dev subsystem, with standardized 'simple' userspace interface (sysfs + cdev) remove redundant __packed keywords use __be16/32 types wherever values are explicitly big-endian hms-profinet: remove configuration code, and uapi headers: not supported (yet) when registering as a fieldbus_dev. anybuss-host: use struct kref to reference-count tasks replace busy loops with usleep_range() loop after 10 tries use threaded irq so time_before_eq(jiffies, timeout) will continue to work allow client devices to be assigned a devicetree node, in the same way as pci/mmc/... v3: devicetree-bindings adding the vendor prefix is now a separate commit anybus-bridge: moved misc driver to drivers/bus/ converted of_gpio_* to gpiod_* abstractions can power readout is now a fixed-voltage regulator anybuss-host: converted refcounts from atomic_t to refcount_t fixed potential use-after-free hms-profinet: applied minor kernel build robot suggestion v2: added architecture overview comments to host driver completely reworked anybus-bridge driver, it becomes a reset controller anybuss-host driver now needs devicetree entry, link to reset controller I will hold off on kernel-doc until the overall architecture gets more validation / approval fixed Kconfig, comment-style, document ioctl magic numbers removed redundant pwm dependency renamed enable-gpios to reset-gpios stop driving reset-gpio after unloading driver use interrupt-parent / interrupts method to describe interrupts in the devicetree convert references 'i.MX WEIM parallel bus' to 'parallel bus' replace devicetree functions with more generic platform_get_resource() platform_get_irq() added device unique data to add_device_randomness() v1: first shot Sven Van Asbroeck (7): fieldbus_dev: add Fieldbus Device subsystem. fieldbus: support the Arcx anybus bridge dt-bindings: Add vendor prefix for arcx / Archronix dt-bindings: anybus-bridge: document devicetree binding fieldbus: support HMS Anybus-S bus dt-bindings: anybuss-host: document devicetree binding fieldbus_dev: support HMS Profinet IRT industrial controller Documentation/ABI/testing/fieldbus-dev-cdev | 31 + .../ABI/testing/sysfs-class-fieldbus-dev | 63 + .../bindings/fieldbus/arcx,anybus-bridge.txt | 34 + .../bindings/fieldbus/arcx,anybuss-host.txt | 66 + .../devicetree/bindings/vendor-prefixes.txt | 1 + Documentation/fieldbus_dev/fieldbus_dev.txt | 66 + drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/fieldbus/Kconfig | 56 + drivers/fieldbus/Makefile | 12 + drivers/fieldbus/anybus-bridge.c | 321 ++++ drivers/fieldbus/anybuss-host.c | 1497 +++++++++++++++++ drivers/fieldbus/dev_core.c | 355 ++++ drivers/fieldbus/hms-profinet.c | 223 +++ include/linux/anybuss-client.h | 104 ++ include/linux/fieldbus_dev.h | 106 ++ 16 files changed, 2938 insertions(+) create mode 100644 Documentation/ABI/testing/fieldbus-dev-cdev create mode 100644 Documentation/ABI/testing/sysfs-class-fieldbus-dev create mode 100644 Documentation/devicetree/bindings/fieldbus/arcx,anybus-bridge.txt create mode 100644 Documentation/devicetree/bindings/fieldbus/arcx,anybuss-host.txt create mode 100644 Documentation/fieldbus_dev/fieldbus_dev.txt create mode 100644 drivers/fieldbus/Kconfig create mode 100644 drivers/fieldbus/Makefile create mode 100644 drivers/fieldbus/anybus-bridge.c create mode 100644 drivers/fieldbus/anybuss-host.c create mode 100644 drivers/fieldbus/dev_core.c create mode 100644 drivers/fieldbus/hms-profinet.c create mode 100644 include/linux/anybuss-client.h create mode 100644 include/linux/fieldbus_dev.h -- 2.17.1
