On Wed, 21 Mar 2012 23:38:11 +0100, Sylwester Nawrocki <[email protected]> wrote: > > Hello, > > I'm working on adding the device tree support for two devices that > share some IO registers. Exactly, there is one shared SFR that > contains a common bit to enable two PHY devices, and another two > bits, each to separately reset each PHY. > > Currently this shared register is statically memory mapped and it is > handled by a platform specific callback, that both drivers use to > control their corresponding (sub)devices in synchronised manner. > > The two devices are a MIPI-CSI2 receiver and a MIPI-DSI transmitter, > and the common register is there to control the camera and the display > port PHY. The hardware design is a bit unfortunate, but there is not > much I could do about it.
Generally, this is handled by having a third node for the shared register block and both device nodes holding a phandle to it. No, there isn't any common infrastructure for implementing this, but it isn't very much code. g. _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
