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2021-04-24Revert "i3c master: fix missing destroy_workqueue() on error in ↵Jae Hyun Yoo1-4/+1
i3c_master_register" Adding the destroy_workqueue call in i3c_master_register introduced below kernel warning because it makes duplicate destroy_workqueue calls when i3c_master_register fails after allocating the workqueue. The workqueue will be destroyed by i3c_masterdev_release which is called by put_device at the end of the i3c_master_register function eventually in failure cases so the workqueue doesn't need to be destroyed in i3c_master_register. [ 6.972952] WARNING: CPU: 1 PID: 1 at lib/list_debug.c:48 __list_del_entry_valid+0x9c/0xf4 [ 6.982205] list_del corruption, 8fe03c08->prev is LIST_POISON2 (00000122) [ 6.989910] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G W 5.10.23-c12838a-dirty-31dc772 #1 [ 7.000295] Hardware name: Generic DT based system [ 7.005638] Backtrace: [ 7.008369] [<809133f0>] (dump_backtrace) from [<80913644>] (show_stack+0x20/0x24) [ 7.016819] r7:00000030 r6:60000013 r5:00000000 r4:813b5d40 [ 7.023137] [<80913624>] (show_stack) from [<8091e1a0>] (dump_stack+0x9c/0xb0) [ 7.031201] [<8091e104>] (dump_stack) from [<8011fa30>] (__warn+0xf8/0x154) [ 7.038972] r7:00000030 r6:00000009 r5:804fa1c8 r4:80b6eca4 [ 7.045289] [<8011f938>] (__warn) from [<80913d14>] (warn_slowpath_fmt+0x8c/0xc0) [ 7.053641] r7:00000030 r6:80b6eca4 r5:80b6ed74 r4:818cc000 [ 7.059960] [<80913c8c>] (warn_slowpath_fmt) from [<804fa1c8>] (__list_del_entry_valid+0x9c/0xf4) [ 7.069866] r9:96becf8c r8:818cc000 r7:8fe03c10 r6:8fe03c00 r5:8fe03ba0 r4:ff7ead4c [ 7.078513] [<804fa12c>] (__list_del_entry_valid) from [<8013f0b4>] (destroy_workqueue+0x1c4/0x23c) [ 7.088615] [<8013eef0>] (destroy_workqueue) from [<806aa124>] (i3c_masterdev_release+0x40/0xb0) [ 7.098421] r7:00000000 r6:81a43b80 r5:8fe65360 r4:8fe65048 [ 7.104740] [<806aa0e4>] (i3c_masterdev_release) from [<805f3f04>] (device_release+0x40/0xb0) [ 7.114254] r5:00000000 r4:8fe65048 [ 7.118245] [<805f3ec4>] (device_release) from [<808fe754>] (kobject_put+0xc8/0x204) [ 7.126885] r5:813978dc r4:8fe65048 [ 7.130877] [<808fe68c>] (kobject_put) from [<805f5fbc>] (put_device+0x20/0x24) [ 7.139037] r7:8fe65358 r6:8fe65368 r5:8fe65358 r4:8fe65048 [ 7.145355] [<805f5f9c>] (put_device) from [<806abac4>] (i3c_master_register+0x338/0xb00) [ 7.154487] [<806ab78c>] (i3c_master_register) from [<806ae084>] (dw_i3c_probe+0x224/0x24c) [ 7.163811] r10:00000000 r9:8fe7a100 r8:00000032 r7:819fa810 r6:819fa800 r5:8fe65040 [ 7.172547] r4:00000000 [ 7.175376] [<806ade60>] (dw_i3c_probe) from [<805fdc14>] (platform_drv_probe+0x44/0x80) [ 7.184409] r9:813a25c0 r8:00000000 r7:815ec114 r6:00000000 r5:813a25c0 r4:819fa810 [ 7.193053] [<805fdbd0>] (platform_drv_probe) from [<805fb83c>] (really_probe+0x108/0x50c) [ 7.202275] r5:815ec004 r4:819fa810 [ 7.206265] [<805fb734>] (really_probe) from [<805fc180>] (driver_probe_device+0xb4/0x190) [ 7.215492] r10:813dc000 r9:80c4385c r8:000000d9 r7:813a25c0 r6:819fa810 r5:00000000 [ 7.224228] r4:813a25c0 [ 7.227055] [<805fc0cc>] (driver_probe_device) from [<805fc5cc>] (device_driver_attach+0xb8/0xc0) [ 7.236959] r9:80c4385c r8:000000d9 r7:813a25c0 r6:819fa854 r4:819fa810 [ 7.244439] [<805fc514>] (device_driver_attach) from [<805fc65c>] (__driver_attach+0x88/0x16c) [ 7.254051] r7:00000000 r6:819fa810 r5:00000000 r4:813a25c0 [ 7.260369] [<805fc5d4>] (__driver_attach) from [<805f954c>] (bus_for_each_dev+0x88/0xc8) [ 7.269489] r7:00000000 r6:818cc000 r5:805fc5d4 r4:813a25c0 [ 7.275806] [<805f94c4>] (bus_for_each_dev) from [<805fc76c>] (driver_attach+0x2c/0x30) [ 7.284739] r7:81397c98 r6:00000000 r5:8fe7db80 r4:813a25c0 [ 7.291057] [<805fc740>] (driver_attach) from [<805f9eec>] (bus_add_driver+0x120/0x200) [ 7.299984] [<805f9dcc>] (bus_add_driver) from [<805fce44>] (driver_register+0x98/0x128) [ 7.309005] r7:80c4383c r6:00000000 r5:00000000 r4:813a25c0 [ 7.315323] [<805fcdac>] (driver_register) from [<805fedb4>] (__platform_driver_register+0x50/0x58) [ 7.325410] r5:818cc000 r4:81397c98 [ 7.329404] [<805fed64>] (__platform_driver_register) from [<80c23398>] (dw_i3c_driver_init+0x24/0x28) [ 7.339790] r5:818cc000 r4:80c23374 [ 7.343784] [<80c23374>] (dw_i3c_driver_init) from [<80c01300>] (do_one_initcall+0xac/0x1d0) [ 7.353206] [<80c01254>] (do_one_initcall) from [<80c01630>] (kernel_init_freeable+0x1a8/0x204) [ 7.362916] r8:000000d9 r7:80c4383c r6:00000007 r5:819ca2c0 r4:80c67680 [ 7.370398] [<80c01488>] (kernel_init_freeable) from [<8091eb18>] (kernel_init+0x18/0x12c) [ 7.379616] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8091eb00 [ 7.388343] r4:00000000 [ 7.391170] [<8091eb00>] (kernel_init) from [<80100148>] (ret_from_fork+0x14/0x2c) [ 7.399607] Exception stack(0x818cdfb0 to 0x818cdff8) [ 7.405243] dfa0: 00000000 00000000 00000000 00000000 [ 7.414371] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 7.423499] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 7.430879] r5:8091eb00 r4:00000000 This reverts commit 59165d16c699182b86b5c65181013f1fd88feb62. Fixes: 59165d16c699 ("i3c master: fix missing destroy_workqueue() on error in i3c_master_register") Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20210408172803.24599-1-jae.hyun.yoo@linux.intel.com
2021-03-09i3c: master: svc: remove redundant assignment to cmd->read_lenColin Ian King1-1/+0
The assignment of xfer_len to cmd->read_len appears to be redundant as the next statement re-assigns the value 0 to it. Clean up the code by removing the redundant first assignment. Addresses-Coverity: ("Unused value") Fixes: dd3c52846d59 ("i3c: master: svc: Add Silvaco I3C master driver") Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20210224151349.202332-1-colin.king@canonical.com
2021-02-22Merge tag 'i3c/for-5.12' of ↵Linus Torvalds6-10/+1496
git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux Pull i3c update from Alexandre Belloni: "Subsystem: - Handle drivers without probe or remove callback - Remove callback now returns void - DT documentation is now in yaml New driver: - Silvaco I3C master" * tag 'i3c/for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: i3c: master: dw: Drop redundant disec call MAINTAINERS: Add Silvaco I3C master i3c: master: svc: Add Silvaco I3C master driver dt-bindings: i3c: Describe Silvaco master binding dt-bindings: Add vendor prefix for Silvaco dt-bindings: i3c: mipi-hci: Include the bus binding dt-bindings: i3c: Convert the bus description to yaml i3c: Make remove callback return void i3c: Handle drivers without probe or remove callback i3c/master/mipi-i3c-hci: Specify HAS_IOMEM dependency
2021-02-06i3c: master: dw: Drop redundant disec callMiquel Raynal1-5/+0
Disabling all event calls is already handled by the core right before starting the DAA process. Do not do it again when the DAA process completes, it is redundant. Fixes: 1dd728f5d4d4 ("i3c: master: Add driver for Synopsys DesignWare IP") Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20201228105501.6104-1-miquel.raynal@bootlin.com
2021-02-06i3c: master: svc: Add Silvaco I3C master driverMiquel Raynal3-0/+1487
Add support for Silvaco I3C dual-role IP. The master role is supported in SDR mode only. I2C transfers have not been tested but are shared because they are very close to the I3C transfers in terms of register configuration. The IBI processing follows this logic: - When a slave advertizes an interrupt (SDA pulled low) an interrupt gets generated by the master. This time is unbounded and may be deferred. - The IRQ handler itself does not process anything: it only queues a work that will be run in non-atomic context. This is needed because short wait periods must be experienced. - The IBI job is divided in two parts: the first one is "critical" in the sense that it may not support getting interrupted. If this happens, after this first section the driver checks the master error register and depending on its content either flushes everything and errors out, or ends the processing (this second section may be interrupted). - If the critical section got interrupted, the slave will automatically respin it's IBI request when it will be allowed to. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20210121101808.14654-6-miquel.raynal@bootlin.com
2021-02-02i3c: Make remove callback return voidUwe Kleine-König1-7/+3
The driver core ignores the return value of struct bus_type::remove() because there is only little that can be done. To simplify the quest to make this function return void, let struct i3c_driver::remove() return void, too. This makes it obvious that returning an error code is a bad idea and future driver authors cannot get that wrong. Up to now there are no drivers with a remove callback, so there is no need to adapt drivers. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20210128091048.17006-2-u.kleine-koenig@pengutronix.de
2021-02-02i3c: Handle drivers without probe or remove callbackUwe Kleine-König2-4/+11
A registered driver without a probe callback doesn't make sense, so refuse to register such a driver. (Otherwise i3c_device_probe() yields a NULL pointer exception.) A driver without remove is possible, e.g. when all resources are freed using devm callbacks. So guard the call to driver->remove by a check for being non-NULL. Note that the only in-tree i3c driver (drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c) doesn't have a remove callback. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20210128091048.17006-1-u.kleine-koenig@pengutronix.de
2021-02-01i3c/master/mipi-i3c-hci: Specify HAS_IOMEM dependencyDavid Gow1-0/+1
The MIPI i3c HCI driver makes use of IOMEM functions like devm_platform_ioremap_resource(), which are only available if CONFIG_HAS_IOMEM is defined. This causes the driver to be enabled under make ARCH=um allyesconfig, even though it won't build. By adding a dependency on HAS_IOMEM, the driver will not be enabled on architectures which don't support it. Fixes: 9ad9a52cce28 ("i3c/master: introduce the mipi-i3c-hci driver") Signed-off-by: David Gow <davidgow@google.com> Acked-by: Nicolas Pitre <npitre@baylibre.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20210127040636.1535722-1-davidgow@google.com
2020-12-31i3c/master/mipi-i3c-hci: Fix position of __maybe_unused in i3c_hci_of_matchNathan Chancellor1-1/+1
Clang warns: ../drivers/i3c/master/mipi-i3c-hci/core.c:780:21: warning: attribute declaration must precede definition [-Wignored-attributes] static const struct __maybe_unused of_device_id i3c_hci_of_match[] = { ^ ../include/linux/compiler_attributes.h:267:56: note: expanded from macro '__maybe_unused' #define __maybe_unused __attribute__((__unused__)) ^ ../include/linux/mod_devicetable.h:262:8: note: previous definition is here struct of_device_id { ^ 1 warning generated. 'struct of_device_id' should not be split, as it is a type. Move the __maybe_unused attribute after the static and const qualifiers so that there are no warnings about this variable, period. Fixes: 95393f3e07ab ("i3c/master/mipi-i3c-hci: quiet maybe-unused variable warning") Link: https://github.com/ClangBuiltLinux/linux/issues/1221 Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Acked-by: Nicolas Pitre <npitre@baylibre.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20201222025931.3043480-1-natechancellor@gmail.com
2020-12-17i3c/master/mipi-i3c-hci: quiet maybe-unused variable warningNicolas Pitre1-1/+1
If CONFIG_OF is disabled then the matching table is notreferenced. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Nicolas Pitre <npitre@baylibre.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2020-11-25i3c/master: Fix uninitialized variable next_addrColin Ian King1-1/+1
The variable next_addr is not initialized and is being used in a call to i3c_master_get_free_addr as a starting point to find the next address. Fix this by initializing next_addr to 0 to avoid an uninitialized garbage starting address from being used. Addresses-Coverity: ("Uninitialized scalar variable") Fixes: 9ad9a52cce28 ("i3c/master: introduce the mipi-i3c-hci driver") Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Nicolas Pitre <npitre@baylibre.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Link: https://lore.kernel.org/linux-i3c/20201124123504.396249-1-colin.king@canonical.com
2020-11-23i3c/master: introduce the mipi-i3c-hci driverNicolas Pitre18-0/+4264
This adds basic support for hardware implementing the MIPI I3C HCI specification. This driver is currently limited by the capabilities of the I3C subsystem, meaning things like scheduled commands, auto-commands and NCM mode are not yet supported. This supports version 1.0 of the MIPI I3C HCI spec, as well as the imminent release of version 1.1. Support for draft version 2.0 of the spec is also largely included with the caveat that future adjustments to this code are likely as the spec is still a work in progress. This is also lightly tested as actual hardware is still very scarce, even for HCI v1.0. Hence the EXPERIMENTAL tag. Further contributions to this driver are expected once vendor implementations and new I3C devices become available. Signed-off-by: Nicolas Pitre <npitre@baylibre.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Link: https://lore.kernel.org/linux-i3c/20201111220510.3622216-3-nico@fluxnic.net
2020-11-23i3c master: fix missing destroy_workqueue() on error in i3c_master_registerQinglang Miao1-1/+4
Add the missing destroy_workqueue() before return from i3c_master_register in the error handling case. Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Link: https://lore.kernel.org/linux-i3c/20201028091543.136167-1-miaoqinglang@huawei.com
2020-10-17Merge tag 'i3c/for-5.10' of ↵Linus Torvalds2-54/+94
git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux Pull i3c updates from Boris Brezillon: - Fix DAA for the pre-reserved address case - Fix an error path in the cadence driver * tag 'i3c/for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: i3c: master: Fix error return in cdns_i3c_master_probe() i3c: master: fix for SETDASA and DAA process i3c: master add i3c_master_attach_boardinfo to preserve boardinfo
2020-10-07i3c: master: Fix error return in cdns_i3c_master_probe()Jing Xiangfeng1-1/+3
Fix to return negative error code -ENOMEM from the error handling case instead of 0. Fixes: 603f2bee2c54 ("i3c: master: Add driver for Cadence IP") Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Link: https://lore.kernel.org/linux-i3c/20200911033350.23904-1-jingxiangfeng@huawei.com
2020-09-14i3c: master: fix for SETDASA and DAA processParshuram Thombare1-51/+74
This patch fix following issue. Controller slots blocked for devices with static_addr but no init_dyn_addr may limit the number of I3C devices on the bus which gets dynamic address in DAA. So instead of attaching all the devices with static_addr, now we only attach the devices which successfully complete SETDASA. For remaining devices with init_dyn_addr, i3c_master_add_i3c_dev_locked() will try to set requested dynamic address after DAA. Signed-off-by: Parshuram Thombare <pthombar@cadence.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Link: https://lore.kernel.org/linux-i3c/1598337109-14770-1-git-send-email-pthombar@cadence.com
2020-08-23treewide: Use fallthrough pseudo-keywordGustavo A. R. Silva1-1/+1
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-08-19i3c: master add i3c_master_attach_boardinfo to preserve boardinfoParshuram Thombare1-2/+17
Boardinfo was lost if I3C object for devices with boardinfo available are not created or not added to the I3C device list because of some failure e.g. SETDASA failed, retrieve info failed etc This patch adds i3c_master_attach_boardinfo which scan boardinfo list in the master object and 'attach' it to the I3C device object. Fixes: 3a379bbcea0a ("i3c: Add core I3C infrastructure") Signed-off-by: Parshuram Thombare <pthombar@cadence.com> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Link: https://lore.kernel.org/linux-i3c/1590053542-389-1-git-send-email-pthombar@cadence.com
2020-04-16i3c master: GETMRL's 3rd byte is optional even with BCR_IBI_PAYLOADNicolas Pitre1-8/+8
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 Sang1-1/+1
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. Silva2-2/+2
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 Brezillon1-28/+22
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 Brezillon1-0/+22
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 Brezillon1-1/+1
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 Sang1-1/+1
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 Soares1-0/+16
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 Li1-3/+1
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 Li1-3/+1
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 Gaignard1-2/+2
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 Gaj1-5/+44
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 Uytterhoeven1-1/+1
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 Soares1-1/+1
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 Lin1-1/+1
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 Wang1-2/+4
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 Gaj3-8/+10
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 Shevchenko1-16/+10
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 Dasgupta1-1/+3
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 Soares2-45/+53
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 Torvalds3-38/+61
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. Silva1-3/+2
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 Soares1-0/+1
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 Soares1-0/+5
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 Soares1-13/+38
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 Gaj3-22/+15
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 Gleixner2-0/+2
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 Torvalds2-12/+3
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 Carpenter1-2/+3
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 Soares1-1/+1
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 Soares1-3/+2
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 Soares1-10/+0
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>
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