From: Parshuram Thombare <pthombar@cadence.com>
To: <bbrezillon@kernel.org>, <vitor.soares@synopsys.com>
Cc: mparab@cadence.com, Parshuram Thombare <pthombar@cadence.com>,
praneeth@ti.com, linux-kernel@vger.kernel.org, pgaj@cadence.com,
linux-i3c@lists.infradead.org
Subject: [PATCH v6 0/8] I3C mastership handover support
Date: Fri, 17 Apr 2020 18:19:58 +0200 [thread overview]
Message-ID: <1587140398-29473-1-git-send-email-pthombar@cadence.com> (raw)
Hi,
This patch series is to add secondary master support, mastership
handover, DEFSLVS processing to I3C master subsystem and
Cadence's I3C master controller driver.
In comparison to previous patch set to enable mastership handover
support, there are some design changes and improvements listed
in v5-v6 change log below.
Also, I am adding flow diagram in documentation to help understand
the code changes and intended results.
Please have look and provide your feedback.
Main changes between v5 and v6 are:
- Moved populate_bus() hook to master subsystem code.
- For secondary master initialization i3c_master_register
spawan separate threads, as secondary master may have to
wait for DEFSLVS and bus mastership.
- Populate bus info is based on DEFSLVS data and take care
of hot plugged / unplugged I3C devices.
- Split bus_init into bus_init and master_set_info callbacks
- Moved mastership aquire and handover to separate state
machines.
- Added DEFSLVS processing code.
- Moved back all locks in side the subsystem code.
- Secondary mastership support to Cadence I3C master
controller driver
- Sysfs key 'i3c_acquire_bus' to acauire bus.
- NULL check for pool pointer in i3c_generic_ibi_free_pool.
Main changes between v4 and v5 are:
- Add populate_bus() hook
- Split i3c_master_register into init and register pair
- Split device information retrieval, let add partialy discovered devices
- Make i3c_master_set_info private
- Add separate function to register secondary master
- Reworked secondary master register in CDNS driver
- Export i3c_bus_set_mode
Main changes between v3 and v4 are:
- Reworked acquire bus ownership
- Refactored the code
Main changes between v2 and v3 are:
- Added DEFSLVS devices are registered from master driver
- Reworked I2C registering on secondary master side
- Reworked Mastership event is enabled/disabled globally (for all devices)
Main changes between initial version and v2 are:
- Reworked devices registration on secondary master side
- Reworked mastership event disabling/enabling
- Reworked bus locking during mastership takeover process
- Added DEFSLVS devices registration during initialization
- Fixed style issues
Regards,
Parshuram Thombare
Parshuram Thombare (8):
i3c: master: mastership handover document
i3c: master: split bus_init callback into bus_init and master_set_info
i3c: master: i3c mastership request and handover
i3c: master: defslvs processing
i3c: master: check for non null pointer
i3c: master: secondary master initialization
i3c: master: added sysfs key i3c_acquire_bus
i3c: master: add mastership handover support to cdns i3c master driver
Documentation/driver-api/i3c/index.rst | 1 +
.../i3c/mastership-handover-flow-diagram.rst | 209 ++++++
drivers/i3c/master.c | 627 ++++++++++++++++--
drivers/i3c/master/dw-i3c-master.c | 29 +-
drivers/i3c/master/i3c-master-cdns.c | 426 ++++++++++--
include/linux/i3c/master.h | 48 +-
6 files changed, 1235 insertions(+), 105 deletions(-)
create mode 100644 Documentation/driver-api/i3c/mastership-handover-flow-diagram.rst
--
2.17.1
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next reply other threads:[~2020-04-17 16:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-17 16:19 Parshuram Thombare [this message]
2020-04-17 16:20 ` [PATCH v6 1/8] i3c: master: mastership handover document Parshuram Thombare
2020-04-30 7:40 ` Boris Brezillon
2020-04-17 16:20 ` [PATCH v6 2/8] i3c: master: split bus_init callback into bus_init and master_set_info Parshuram Thombare
2020-04-30 7:55 ` Boris Brezillon
2020-04-17 16:21 ` [PATCH v6 3/8] i3c: master: i3c mastership request and handover Parshuram Thombare
2020-04-30 8:07 ` Boris Brezillon
2020-04-17 16:21 ` [PATCH v6 4/8] i3c: master: defslvs processing Parshuram Thombare
2020-04-17 16:22 ` [PATCH v6 5/8] i3c: master: check for non null pointer Parshuram Thombare
2020-04-17 16:22 ` [PATCH v6 6/8] i3c: master: secondary master initialization Parshuram Thombare
2020-04-17 16:22 ` [PATCH v6 7/8] i3c: master: added sysfs key i3c_acquire_bus Parshuram Thombare
2020-04-17 16:24 ` [PATCH v6 8/8] i3c: master: add mastership handover support to cdns i3c master driver Parshuram Thombare
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