The published drivers describe the essential and generic parts of TI DS90Ux9xx series of ICs, which allow to transfer video, audio and control signals between FPD-Link III serializers and deserializers. The placement of TI DS90Ux9xx I2C client driver was selected to be drivers/mfd as the most natural location of a true MFD driver, apparently drivers/media/i2c is for another type of device drivers, also DS90Ux9xx I2C bridge subcontroller driver is placed nearby, because drivers/i2c for it would be an inappropriate destination as well. Informally the TI DS90Ux9xx ICs serve a similar function to SMSC/Microchip MOST, and its drivers are in drivers/staging/most, the final destination is unknown to me. Please feel free to advise a better location for the published drivers, at the moment the core drivers are in drivers/mfd, but I select linux-media as a mailing list. The published drivers instantly give a chance to test video bridge functionality to a TI DS90Ux9xx deserializer equipped display panel with the aide of Laurent's "lvds-encoder" driver by misusing it as a generic and transparent drm bridge with no particular LVDS specifics in it, for that it should be sufficient just to add the corresponding device node and input/output ports as children of a serializer connected to an application controller. While the selected scheme of IC description by a list of subdevices, where each one described in its own device node, works pretty well, it might lead to unnecessary overcomplicated description of connections between subdevices on serializer and deserializer sides, i.e. for proper description of links/connections video serializer should be linked to video deserializer, audio serializer should be linked to audio deserializer and so on, however formally there is just one FPD-III Link connection between two ICs. The series of patches is rebased on top of linux-next, and there are more changes in the queue to provide better support of TI DS90Ux9xx ICs. The introduction to the ICs and drivers can be found in my presentation https://schd.ws/hosted_files/ossalsjp18/8a/vzapolskiy_als2018.pdf Sandeep Jain (1): dt-bindings: mfd: ds90ux9xx: add description of TI DS90Ux9xx ICs Vladimir Zapolskiy (6): dt-bindings: mfd: ds90ux9xx: add description of TI DS90Ux9xx I2C bridge dt-bindings: pinctrl: ds90ux9xx: add description of TI DS90Ux9xx pinmux mfd: ds90ux9xx: add TI DS90Ux9xx de-/serializer MFD driver mfd: ds90ux9xx: add I2C bridge/alias and link connection driver pinctrl: ds90ux9xx: add TI DS90Ux9xx pinmux and GPIO controller driver MAINTAINERS: add entry for TI DS90Ux9xx FPD-Link III drivers .../bindings/mfd/ti,ds90ux9xx-i2c-bridge.txt | 61 ++ .../devicetree/bindings/mfd/ti,ds90ux9xx.txt | 66 ++ .../bindings/pinctrl/ti,ds90ux9xx-pinctrl.txt | 83 ++ MAINTAINERS | 10 + drivers/mfd/Kconfig | 22 + drivers/mfd/Makefile | 2 + drivers/mfd/ds90ux9xx-core.c | 879 ++++++++++++++++ drivers/mfd/ds90ux9xx-i2c-bridge.c | 764 ++++++++++++++ drivers/pinctrl/Kconfig | 11 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-ds90ux9xx.c | 970 ++++++++++++++++++ include/linux/mfd/ds90ux9xx.h | 42 + 12 files changed, 2911 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/ti,ds90ux9xx-i2c-bridge.txt create mode 100644 Documentation/devicetree/bindings/mfd/ti,ds90ux9xx.txt create mode 100644 Documentation/devicetree/bindings/pinctrl/ti,ds90ux9xx-pinctrl.txt create mode 100644 drivers/mfd/ds90ux9xx-core.c create mode 100644 drivers/mfd/ds90ux9xx-i2c-bridge.c create mode 100644 drivers/pinctrl/pinctrl-ds90ux9xx.c create mode 100644 include/linux/mfd/ds90ux9xx.h -- 2.17.1
