* Add support for limited bus mode
* Fix the Cadence DT binding doc
* Use struct_size() to allocate a DEFSLVS packet
-----BEGIN PGP SIGNATURE-----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=Uj8o
-----END PGP SIGNATURE-----
Merge tag 'i3c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux
Pull ic3 updates from Boris Brezillon:
- Drop support for 10-bit I2C addresses
- Add support for limited bus mode
- Fix the Cadence DT binding doc
- Use struct_size() to allocate a DEFSLVS packet
* tag 'i3c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux:
i3c: master: Use struct_size() helper
dt-bindings: i3c: cdns: Use correct cells for I2C device
i3c: dw: add limited bus mode support
i3c: add mixed limited bus mode
i3c: fix i2c and i3c scl rate by bus mode
dt-bindings: i3c: Document dropped support for I2C 10 bit devices
i3c: Drop support for I2C 10 bit addresing
Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes, in particular in the
context in which this code is being used.
So, replace the following form:
sizeof(*defslvs) + ((ndevs - 1) * sizeof(struct i3c_ccc_dev_desc))
with:
struct_size(defslvs, slaves, ndevs - 1)
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
This patch add limited bus mode support for DesignWare i3c master
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
Cc: Boris Brezillon <bbrezillon@kernel.org>
Cc: <linux-kernel@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
The i3c bus spec defines a bus configuration where i2c devices don't
have a 50ns filter but support SCL running at SDR max rate (12.5MHz).
This patch introduces the limited bus mode so that users can use
a higher speed in presence of i2c devices index 1.
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
Cc: Boris Brezillon <bbrezillon@kernel.org>
Cc: <linux-kernel@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Currently the I3C framework limits SCL frequency to FM speed when
dealing with a mixed slow bus, even if all I2C devices are FM+ capable.
The core was also not accounting for I3C speed limitations when
operating in mixed slow mode and was erroneously using FM+ speed as the
max I2C speed when operating in mixed fast mode.
Fixes: 3a379bbcea ("i3c: Add core I3C infrastructure")
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
Cc: Boris Brezillon <bbrezillon@kernel.org>
Cc: <stable@vger.kernel.org>
Cc: <linux-kernel@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
This patch drops support for I2C devices with 10 bit addressing. When I2C
device with 10 bit address is defined in DT, I3C master registration fails.
Address space for I2C devices has been reduced and ->i2c_funcs() hook has been
removed.
Because this patch series dropped support for 10 bit I2C devices, support is
also dropped in Cadence I3C master driver and Synopsys DesignWare I3C master
driver.
Signed-off-by: Przemyslaw Gaj <pgaj@cadence.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Remove dead code in the DW driver
-----BEGIN PGP SIGNATURE-----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=/U9S
-----END PGP SIGNATURE-----
Merge tag 'i3c/for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux
Pull i3c update from Boris Brezillon:
- Fix a shift wrap bug in the core
- Remove dead code in the DW driver
* tag 'i3c/for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux:
i3c: Fix a shift wrap bug in i3c_bus_set_addr_slot_status()
i3c: master: dw: remove dead code from dw_i3c_master_*_xfers()
The problem here is that addr can be I3C_BROADCAST_ADDR (126). That
means we're shifting by (126 * 2) % 64 which is 60. The
I3C_ADDR_SLOT_STATUS_MASK is an enum which is an unsigned int in GCC
so shifts greater than 31 are undefined.
Fixes: 3a379bbcea ("i3c: Add core I3C infrastructure")
Cc: <stable@vger.kernel.org>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
The controller was being disabled incorrectly. The correct way is to clear
the DEV_CTRL_ENABLE bit.
Fix this by clearing this bit.
Cc: Boris Brezillon <bbrezillon@kernel.org>
Cc: <stable@vger.kernel.org>
Fixes: 1dd728f5d4 ("i3c: master: Add driver for Synopsys DesignWare IP")
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
The validation of random PID should be done by checking the
boardinfo->pid instead of info.pid which is empty.
Doing the change the info struture declaration is no longer necessary.
Cc: Boris Brezillon <bbrezillon@kernel.org>
Cc: <stable@vger.kernel.org>
Fixes: 3a379bbcea ("i3c: Add core I3C infrastructure")
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Detected by CoverityScan (Event result_independent_of_operands):
"(i3c_xfers + i).len > 65536" is always false regardless of the values
of its operands. This occurs as the logical operand of "if"
"(i2c_xfers + i).len > 65536" is always false regardless of the values
of its operands. This occurs as the logical operand of "if"
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
- Update the I3C entries in MAINTAINERS to add an IRC chan
-----BEGIN PGP SIGNATURE-----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=Ijxi
-----END PGP SIGNATURE-----
Merge tag 'i3c/for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux
Pull i3c updates from Boris Brezillon:
- Add a /* fall-through */ comment in the dw-i3c-master driver
- Update the I3C entries in MAINTAINERS to add an IRC chan
* tag 'i3c/for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux:
i3c: master: dw-i3c-master: mark expected switch fall-through
MAINTAINERS: Add an IRC channel for the I3C subsystem
In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.
This patch fixes the following warning:
drivers/i3c/master/dw-i3c-master.c: In function ‘dw_i3c_master_bus_init’:
drivers/i3c/master/dw-i3c-master.c:603:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
if (ret)
^
drivers/i3c/master/dw-i3c-master.c:605:2: note: here
case I3C_BUS_MODE_PURE:
^~~~
Warning level 3 was used: -Wimplicit-fallthrough=3
This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Vitor Soares <vitor.soares@synopsys.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
In dw_i3c_master_irq_handler(), we already have gotten
&master->xferqueue.lock, if we try to get the same lock again in
dw_i3c_master_dequeue_xfer(), deadlock happens.
We fix this issue by introduing dw_i3c_master_dequeue_xfer_locked()
which does all what dw_i3c_master_dequeue_xfer() does without trying
to lock &master->xferqueue.lock.
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Acked-by: Vitor Soares <vitor.soares@synopsys.com>
Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
If we failed to retrieve the i3c dev, we should detach the i3c dev
I.E i3c_master_detach_i3c_dev().
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
This patch fix i3c_attach/reattach functions.
During the i3c_attach the driver ignores the static address used for
SETDASA CCC command.
During the i3c_reattach the driver doesn't update master->addrs[data->index]
with new address if old_dyn_addr = 0.
Fixes: 1dd728f5d4 ("i3c: master: Add driver for Synopsys DesignWare IP")
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
This patch fixes I2C transfers in Cadence I3C master driver.
There was no way to queue more than one I2C transfer before.
Fixes: 603f2bee2c ("i3c: master: Add driver for Cadence IP")
Signed-off-by: Przemyslaw Gaj <pgaj@cadence.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
This should be >= ARRAY_SIZE() to avoid reading one element beyond the
end of the array.
Fixes: 3a379bbcea ("i3c: Add core I3C infrastructure")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
We should return "ret" as-is. The "newdev" variable is a valid pointer.
Fixes: 3a379bbcea ("i3c: Add core I3C infrastructure")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
The masking operation on status is using a bitwise 'or' rather than
a bitwise 'and' operator, and hence the result is always non-zero
which is probably not what is intended. Fix this by using the correct
operator.
Detected by CoverityScan, CID#1475523 ("Wrong operator used")
Fixes: 88acc98a712a ("i3c: master: Add driver for Synopsys DesignWare IP")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Vitor Soares <vitor.soares@synopsys.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Fixes gcc '-Wunused-but-set-variable' warning:
drivers/i3c/master/i3c-master-cdns.c: In function 'cdns_i3c_master_do_daa':
drivers/i3c/master/i3c-master-cdns.c:1137:16: warning:
variable 'old_i3c_scl_lim' set but not used [-Wunused-but-set-variable]
It never used since introdution in commit
acfab7d324b2 ("i3c: master: Add driver for Cadence IP")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Add core infrastructure to support I3C in Linux and document it.
This infrastructure adds basic I3C support. Advanced features will be
added afterwards.
There are a few design choices that are worth mentioning because they
impact the way I3C device drivers can interact with their devices:
- all functions used to send I3C/I2C frames must be called in
non-atomic context. Mainly done this way to ease implementation, but
this is not set in stone, and if anyone needs async support, new
functions can be added later on.
- the bus element is a separate object, but it's tightly coupled with
the master object. We thus have a 1:1 relationship between i3c_bus
and i3c_master_controller objects, and if 2 master controllers are
connected to the same bus and both exposed to the same Linux instance
they will appear as two distinct busses, and devices on this bus will
be exposed twice.
- I2C backward compatibility has been designed to be transparent to I2C
drivers and the I2C subsystem. The I3C master just registers an I2C
adapter which creates a new I2C bus. I'd say that, from a
representation PoV it's not ideal because what should appear as a
single I3C bus exposing I3C and I2C devices here appears as 2
different buses connected to each other through the parenting (the
I3C master is the parent of the I2C and I3C busses).
On the other hand, I don't see a better solution if we want something
that is not invasive.
Missing features:
- I3C HDR modes are not supported
- no support for multi-master and the associated concepts (mastership
handover, support for secondary masters, ...)
- I2C devices can only be described using DT because this is the only
use case I have. However, the framework can easily be extended with
ACPI and board info support
- I3C slave framework. This has been completely omitted, but shouldn't
have a huge impact on the I3C framework because I3C slaves don't see
the whole bus, it's only about handling master requests and generating
IBIs. Some of the struct, constant and enum definitions could be
shared, but most of the I3C slave framework logic will be different
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
