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2020-04-16i3c master: GETMRL's 3rd byte is optional even with BCR_IBI_PAYLOADNicolas Pitre
According to the I3C spec v1.1 document, GETMRL's payload is 2 bytes, with an optional 3rd byte if the IBI private payload is larger than 1 byte. The whole GETMRL may also be optional so max_ibi_len already defaults to 1 if BCR_IBI_PAYLOAD prior to the i3c_master_getmrl_locked() call. Signed-off-by: Nicolas Pitre <npitre@baylibre.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Link: https://lore.kernel.org/linux-i3c/nycvar.YSQ.7.76.2004151623060.2671@knanqh.ubzr
2020-03-29i3c: convert to use i2c_new_client_device()Wolfram Sang
Move away from the deprecated API. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Link: https://lore.kernel.org/linux-i3c/20200326211002.13241-2-wsa+renesas@sang-engineering.com
2020-02-28i3c: master: Replace zero-length array with flexible-array memberGustavo A. R. Silva
The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertently introduced[3] to the codebase from now on. Also, notice that, dynamic memory allocations won't be affected by this change: "Flexible array members have incomplete type, and so the sizeof operator may not be applied. As a quirk of the original implementation of zero-length arrays, sizeof evaluates to zero."[1] This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Link: https://lore.kernel.org/linux-i3c/20200227131307.GA24935@embeddedor
2020-02-28i3c: Simplify i3c_device_match_id()Boris Brezillon
Simply match against ->match_flags instead of trying to be smart and fix drivers inconsistent ID tables. Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Signed-off-by: Vitor Soares <vitor.soares@synopsys.com> Link: https://lore.kernel.org/linux-i3c/8c5d6523e1c161783db834a3447954f7fd6267e6.1582796652.git.vitor.soares@synopsys.com
2020-02-28i3c: Add a modalias sysfs attributeBoris Brezillon
Create a modalias sysfs attribute for i3c devices. Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Signed-off-by: Vitor Soares <vitor.soares@synopsys.com> Link: https://lore.kernel.org/linux-i3c/a90f64f830128cd12762153de7828b775574c156.1582796652.git.vitor.soares@synopsys.com
2020-02-27i3c: Fix MODALIAS ueventsBoris Brezillon
file2alias uses %X formatters. Fix typos in the MODALIAS uevent to print the part and ext IDs in uppercase. Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Signed-off-by: Vitor Soares <vitor.soares@synopsys.com> Link: https://lore.kernel.org/linux-i3c/9ac5f1f8413fbb0481de76b5e43f2f4e1b2dc49f.1582796652.git.vitor.soares@synopsys.com
2020-02-17i3c: master: no need to iterate master device twiceWolfram Sang
We already have the master device in a variable, reuse it. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Vitor Soares <vitor.soares@synopsys.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Link: https://lore.kernel.org/linux-i3c/20200214145853.24762-1-wsa+renesas@sang-engineering.com
2020-01-13i3c: master: dw: reattach device on first available location of address tableVitor Soares
For today the reattach function only update the device address on the controller. Update the location to the first available too, will optimize the enumeration process avoiding additional checks to keep the available positions on address table consecutive. Signed-off-by: Vitor Soares <vitor.soares@synopsys.com> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2020-01-13i3c: master: cdns: convert to devm_platform_ioremap_resourceYangtao Li
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2020-01-13i3c: master: dw: convert to devm_platform_ioremap_resourceYangtao Li
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Acked-by: Vitor Soares <vitor.soares@synopsys.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2019-12-09i3c: master: make i3c_bus_set_mode staticBenjamin Gaignard
i3c_bus_set_mode function is only used in master.c. Make it static to avoid warning when compiling with W=1. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2019-12-09i3c: master: cdns: add data hold delay supportPrzemyslaw Gaj
This patch adds support for THD_DEL (Data Hold Delay) to Cadence I3C master constoller driver. As per MIPI I3C Specification 1.0, Table 75 (page 142) defines non-zero minimal tHD_PP timing on master output (Fig 65). This setting allows to meet this timing on master's soc outputs, regardless of PCB balancing. Signed-off-by: Przemyslaw Gaj <pgaj@cadence.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2019-10-31i3c: Spelling s/dicovered/discovered/Geert Uytterhoeven
Fix misspellings of "discovered". Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2019-10-01i3c: master: use i3c_dev_get_master()Vitor Soares
Since we have i3c_dev_get_master() available, use it. Signed-off-by: Vitor Soares <vitor.soares@synopsys.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2019-08-27i3c: master: Use dev_to_i3cmaster()Axel Lin
Since we have dev_to_i3cmaster() available, use it. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2019-08-12i3c: master: fix a memory leak bugWenwen Wang
In i3c_master_getmwl_locked(), the buffer used for the dest payload data is allocated using kzalloc() in i3c_ccc_cmd_dest_init(). Later on, the length of the dest payload data is checked against 'sizeof(*mwl)'. If they are not equal, -EIO is returned to indicate the error. However, the allocated buffer is not deallocated on this path, leading to a memory leak. To fix the above issue, free the buffer before returning the error. Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2019-08-11i3c: add addr and lvr to i2c_dev_desc structurePrzemyslaw Gaj
I need to store address and lvr value for I2C devices without static definition in DT. This allows secondary master to transmit DEFSLVS command properly. Main changes between v4 and v5: - Change in defslvs to use addr and lvr from i2c_dev_desc structure - Change in CDNS and DW drivers to use addr and lvr from i2c_dev_desc structure Signed-off-by: Przemyslaw Gaj <pgaj@cadence.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2019-08-11i3c: master: cdns: Use for_each_set_bit()Andy Shevchenko
This simplifies and standardizes slot manipulation code by using for_each_set_bit() library function. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2019-08-11i3c: master: Add of_node_put() before returnNishka Dasgupta
Each iteration of for_each_available_childe_of_node puts the previous node, but in the case of a return from the middle of the loop, there is no put, thus causing a memory leak. Add an of_node_put before the return. Issue found with Coccinelle. Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2019-07-27i3c: move i3c_device_match_id to device.c and export itVitor Soares
Some I3C device drivers need to know which entry matches the i3c_device object passed to the probe function Let's move i3c_device_match_id() to device.c and export it so it can be used by drivers. Signed-off-by: Vitor Soares <vitor.soares@synopsys.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2019-07-09Merge tag 'i3c/for-5.3' of ↵Linus Torvalds
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
2019-07-04i3c: master: Use struct_size() helperGustavo A. R. Silva
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>
2019-06-20i3c: dw: add limited bus mode supportVitor Soares
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>
2019-06-20i3c: add mixed limited bus modeVitor Soares
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>
2019-06-20i3c: fix i2c and i3c scl rate by bus modeVitor Soares
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: 3a379bbcea0a ("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>
2019-05-28i3c: Drop support for I2C 10 bit addresingPrzemyslaw Gaj
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>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner
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>
2019-05-07Merge tag 'i3c/for-5.2' of ↵Linus Torvalds
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()
2019-05-06i3c: Fix a shift wrap bug in i3c_bus_set_addr_slot_status()Dan Carpenter
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: 3a379bbcea0a ("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>
2019-04-10i3c: dw: Fix dw_i3c_master_disable controller by using correct maskVitor Soares
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: 1dd728f5d4d4 ("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>
2019-04-10i3c: Fix the verification of random PIDVitor Soares
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: 3a379bbcea0a ("i3c: Add core I3C infrastructure") Signed-off-by: Vitor Soares <vitor.soares@synopsys.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2019-03-30i3c: master: dw: remove dead code from dw_i3c_master_*_xfers()Vitor Soares
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>
2019-03-04Merge tag 'i3c/for-5.1' of ↵Linus Torvalds
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
2019-02-28i3c: master: dw-i3c-master: mark expected switch fall-throughGustavo A. R. Silva
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>
2019-01-26i3c: master: dw: fix deadlockJisheng Zhang
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>
2019-01-25i3c: fix missing detach if failed to retrieve i3c devJisheng Zhang
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>
2019-01-15i3c: master: dw-i3c-master: fix i3c_attach/reattachVitor Soares
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: 1dd728f5d4d4 ("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>
2019-01-07i3c: master: Fix an error checking typo in 'cdns_i3c_master_probe()'Christophe JAILLET
Fix a cut'n'paste typo. Checking 'master->sysclk' is expected here. Fixes: 603f2bee2c54 ("i3c: master: Add driver for Cadence IP") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
2018-12-12i3c: master: cdns: fix I2C transfers in Cadence I3C master driverPrzemyslaw Gaj
This patch fixes I2C transfers in Cadence I3C master driver. There was no way to queue more than one I2C transfer before. Fixes: 603f2bee2c54 ("i3c: master: Add driver for Cadence IP") Signed-off-by: Przemyslaw Gaj <pgaj@cadence.com> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
2018-12-05ic3: off by one in mode_show()Dan Carpenter
This should be >= ARRAY_SIZE() to avoid reading one element beyond the end of the array. Fixes: 3a379bbcea0a ("i3c: Add core I3C infrastructure") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
2018-12-05i3c: fix an error code in i3c_master_add_i3c_dev_locked()Dan Carpenter
We should return "ret" as-is. The "newdev" variable is a valid pointer. Fixes: 3a379bbcea0a ("i3c: Add core I3C infrastructure") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
2018-12-05i3c: master: dw: fix mask operation by using the correct operatorColin Ian King
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>
2018-12-05i3c: master: Add driver for Synopsys DesignWare IPVitor Soares
Add driver for Synopsys DesignWare I3C master IP Signed-off-by: Vitor Soares <vitor.soares@synopsys.com> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
2018-12-05i3c: master: Remove set but not used variable 'old_i3c_scl_lim'YueHaibing
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>
2018-12-05i3c: master: Add driver for Cadence IPBoris Brezillon
Add a driver for Cadence I3C master IP. Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-12i3c: Add core I3C infrastructureBoris Brezillon
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>
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