i3c: master: Add driver for Cadence IP
Add a driver for Cadence I3C master IP.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
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Changes in v10:
- None
Changes in v9:
- Change the 'depends on' rule (suggested by Arnd)
- Use {read,write}sl() instead of __raw_{readl,writem}() (suggested by
Arnd)
- Add Arnd's R-b
Changes in v8:
- Adjust code to match changes done in the core (bus embedded in master)
Changes in v7:
- Fix readsl/writesl() usage
- Add a depends on ARM || ARM64 || XTENSA to forbid selection of this
driver on platforms that are not implementing readsl/writesl
Changes in v6:
- Rework the attach/detach logic to match the new way of doing things.
- Use kcalloc() where appropriate
- Simplfy access to the RX/TX/IBI_DATA FIFOs
Changes in v5:
- Drop unused len var in cdns_i3c_master_handle_ibi()
- Get IBIR and CMDR depth from CONF_STATUS0
- s/2017/2018/ in copyright header
- Fix coding style issues
Changes in v4:
- Fix potential unsigned integer underflow
- Add missing static specific on IBI related functions
Changes in v3:
- Adjust to match I3C framework changes
- Implement support the CMD RESPONSE QUEUE and IBI QUEUE added in the
latest revision of Cadence master IP
- Remove support for HDR modes
Changes in v2:
- Add basic IBI support. Note that the IP is not really reliable with
regards to IBI because you can't extract IBI payloads as soon as you
have more than one IBI waiting in the HW queue. This is something
that will hopefully be addressed in future revisions of this IP
- Add a simple xfer queueing mechanism to optimize message queuing.
- Fix a few bugs
- Add support for Hot Join
3 files changed
