- 19 Mar, 2020 35 commits
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Manivannan Sadhasivam authored
Add uevent support to MHI bus so that the client drivers can be autoloaded by udev when the MHI devices gets created. The client drivers are expected to provide MODULE_DEVICE_TABLE with the MHI id_table struct so that the alias can be exported. Signed-off-by:
Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Reviewed-by:
Jeffrey Hugo <jhugo@codeaurora.org> Tested-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Manivannan Sadhasivam authored
Add support for transferring data between external modem and host processor using MHI protocol. This is based on the patch submitted by Sujeev Dias: https://lkml.org/lkml/2018/7/9/988Signed-off-by:
Sujeev Dias <sdias@codeaurora.org> Signed-off-by:
Siddartha Mohanadoss <smohanad@codeaurora.org> [mani: splitted the data transfer patch and cleaned up for upstream] Signed-off-by:
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Manivannan Sadhasivam authored
This commit adds support for processing the MHI data and control events from the client device. The client device can report various events such as EE events, state change events by interrupting the host through IRQ and adding events to the event rings allocated by the host during initialization. This is based on the patch submitted by Sujeev Dias: https://lkml.org/lkml/2018/7/9/988Signed-off-by:
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Manivannan Sadhasivam authored
MHI protocol supports downloading RDDM (RAM Dump) image from the device through BHIE. This is useful to debugging as the RDDM image can capture the firmware state. This is based on the patch submitted by Sujeev Dias: https://lkml.org/lkml/2018/7/9/989Signed-off-by:
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Manivannan Sadhasivam authored
MHI supports downloading the device firmware over BHI/BHIe (Boot Host Interface) protocol. Hence, this commit adds necessary helpers, which will be called during device power up stage. This is based on the patch submitted by Sujeev Dias: https://lkml.org/lkml/2018/7/9/989Signed-off-by:
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Manivannan Sadhasivam authored
This commit adds support for basic MHI PM operations such as mhi_async_power_up, mhi_sync_power_up, and mhi_power_down. These routines places the MHI bus into respective power domain states and calls the state_transition APIs when necessary. The MHI controller driver is expected to call these PM routines for MHI powerup and powerdown. This is based on the patch submitted by Sujeev Dias: https://lkml.org/lkml/2018/7/9/989Signed-off-by:
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Manivannan Sadhasivam authored
This commit adds support for transitioning the MHI states as a part of the power management operations. Helpers functions are provided for the state transitions, which will be consumed by the actual power management routines. This is based on the patch submitted by Sujeev Dias: https://lkml.org/lkml/2018/7/9/989Signed-off-by:
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Manivannan Sadhasivam authored
This commit adds support for ringing channel and event ring doorbells by MHI host. The MHI host can use the channel and event ring doorbells for notifying the client device about processing transfer and event rings which it has queued using MMIO registers. This is based on the patch submitted by Sujeev Dias: https://lkml.org/lkml/2018/7/9/989Signed-off-by:
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Manivannan Sadhasivam authored
This commit adds support for creating and destroying MHI devices. The MHI devices binds to the MHI channels and are used to transfer data between MHI host and client device. This is based on the patch submitted by Sujeev Dias: https://lkml.org/lkml/2018/7/9/989Signed-off-by:
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Manivannan Sadhasivam authored
This commit adds support for registering MHI client drivers with the MHI stack. MHI client drivers binds to one or more MHI devices inorder to sends and receive the upper-layer protocol packets like IP packets, modem control messages, and diagnostics messages over MHI bus. This is based on the patch submitted by Sujeev Dias: https://lkml.org/lkml/2018/7/9/987Signed-off-by:
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Manivannan Sadhasivam authored
This commit adds support for registering MHI controller drivers with the MHI stack. MHI controller drivers manages the interaction with the MHI client devices such as the external modems and WiFi chipsets. They are also the MHI bus master in charge of managing the physical link between the host and client device. This is based on the patch submitted by Sujeev Dias: https://lkml.org/lkml/2018/7/9/987Signed-off-by:
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Manivannan Sadhasivam authored
MHI (Modem Host Interface) is a communication protocol used by the host processors to control and communicate with modems over a high speed peripheral bus or shared memory. The MHI protocol has been designed and developed by Qualcomm Innovation Center, Inc., for use in their modems. This commit adds the documentation for the bus and the implementation in Linux kernel. This is based on the patch submitted by Sujeev Dias: https://lkml.org/lkml/2018/7/9/987 Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Signed-off-by:
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Joe Perches authored
Convert the various uses of fallthrough comments to fallthrough; Done via script Link: https://lore.kernel.org/lkml/b56602fcf79f849e733e7b521bb0e17895d390fa.1582230379.git.joe@perches.com/ And by hand: drivers/virt/vboxguest/vboxguest_core.c has a fallthrough comment outside of an #ifdef block that causes gcc to emit a warning if converted in-place. So move the new fallthrough; inside the containing #ifdef/#endif too. Signed-off-by:
Joe Perches <joe@perches.com> Acked-by:
Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/68773b4cd82288b78ca6fcde8c43e249a025378a.1584040050.git.joe@perches.comSigned-off-by:
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Gustavo A. R. Silva authored
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 76497732 ("cxgb3/l2t: Fix undefined behaviour") Signed-off-by:Gustavo A. R. Silva <gustavo@embeddedor.com> Link: https://lore.kernel.org/r/20200227184808.GA1925@embeddedorSigned-off-by:
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H. Nikolaus Schaller authored
kbuild-robot did find a type error in the min(a, b) function used by this driver if built for x86_64 or riscv. Althought it is very unlikely that this driver is built for those platforms it could be used as a template for something else and therefore should be correct. The problem is that we implicitly cast a size_t to unsigned int inside the implementation of the min() function. Since size_t may differ on different compilers and plaforms there may be warnings or not. So let's use only size_t variables on all platforms. Reported-by:
kbuild test robot <lkp@intel.com> Reported-by:
Stephen Rothwell <sfr@canb.auug.org.au> Cc: srinivas.kandagatla@linaro.org Cc: prasannatsmkumar@gmail.com Cc: malat@debian.org Cc: paul@crapouillou.net Signed-off-by:
H. Nikolaus Schaller <hns@goldelico.com> Signed-off-by:
Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200310132257.23358-15-srinivas.kandagatla@linaro.orgSigned-off-by:
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PrasannaKumar Muralidharan authored
This patch brings support for the JZ4780 efuse. Currently it only exposes a read only access to the entire 8K bits efuse memory. Tested-by:
Mathieu Malaterre <malat@debian.org> Signed-off-by:
PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com> Signed-off-by:
Paul Cercueil <paul@crapouillou.net> Signed-off-by:
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PrasannaKumar Muralidharan authored
This patch brings support for the JZ4780 efuse. Currently it only exposes a read only access to the entire 8K bits efuse memory and nvmem cells. To fetch for example the MAC address: dd if=/sys/devices/platform/134100d0.efuse/jz4780-efuse0/nvmem bs=1 skip=34 count=6 status=none | xxd Tested-by:
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PrasannaKumar Muralidharan authored
This patch brings support for the JZ4780 efuse. Currently it only exposes a read only access to the entire 8K bits efuse memory. Tested-by:
Andreas Kemnade <andreas@kemnade.info> Reviewed-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Anson Huang authored
Drop unnecessary initialization of variable 'clk_rate' and 'timing'. Signed-off-by:
Anson Huang <Anson.Huang@nxp.com> Signed-off-by:
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Nicholas Johnson authored
Return -EPERM if reg_read is NULL in bin_attr_nvmem_read() or if reg_write is NULL in bin_attr_nvmem_write(). This prevents NULL dereferences such as the one described in 03cd45d2 ("thunderbolt: Prevent crash if non-active NVMem file is read") Signed-off-by:
Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au> Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Srinivas Kandagatla authored
nvmem provider has to provide either reg_read/write, add a check to enforce this. Signed-off-by:
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Khouloud Touil authored
Put the write-protect GPIO descriptor in nvmem_release() so that it can be automatically released when the associated device's reference count drops to 0. Fixes: 2a127da4 ("nvmem: add support for the write-protect pin") Reported-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
Khouloud Touil <ktouil@baylibre.com> Cc: stable <stable@vger.kernel.org> [Bartosz: tweak the commit message] Signed-off-by:
Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by:
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Bartosz Golaszewski authored
We need to free the ida mapping and nvmem struct if the write-protect GPIO lookup fails. Fixes: 2a127da4 ("nvmem: add support for the write-protect pin") Signed-off-by:
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Bartosz Golaszewski authored
Visibly separate the GPIO request from the previous operation in the code with a newline. Signed-off-by:
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Bartosz Golaszewski authored
Two newlines are unnecessary - remove one. Signed-off-by:
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Yangtao Li authored
Add nvmem_cell_read_u64() helper to ease read of an u64 value on consumer side. This helper is useful on some sunxi platform that has 64 bits data cells stored in no volatile memory. Signed-off-by:
Yangtao Li <tiny.windzz@gmail.com> Signed-off-by:
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Yangtao Li authored
Now there are nvmem_cell_read_u16 and nvmem_cell_read_u32. They are very similar, let's strip out a common part. And use nvmem_cell_read_common to simplify their implementation. Signed-off-by:
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Peng Fan authored
i.MX8MP has 96 banks with each bank 4 words. And it has different ctrl register layout, so add new macros for that. Signed-off-by:
Peng Fan <peng.fan@nxp.com> Signed-off-by:
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Arnd Bergmann authored
The old drivers/char/rtc.c driver was originally the implementation for x86 PCs but got subsequently replaced by the rtc class driver on all architectures except alpha. Move alpha over to the portable driver and remove the old one for good. The CONFIG_JS_RTC option was only ever used on SPARC32 but has not been available for many years, this was used to build the same rtc driver with a different module name. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: linux-alpha@vger.kernel.org Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20200226224322.187960-2-alexandre.belloni@bootlin.comSigned-off-by:
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Arnd Bergmann authored
There are two EFI RTC drivers, the original drivers/char/efirtc.c driver and the more modern drivers/rtc/rtc-efi.c. Both implement the same interface, but the new one does so in a more portable way. Move everything over to that one and remove the old one. Cc: linux-ia64@vger.kernel.org Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Stephane Eranian <eranian@google.com> Signed-off-by:
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Christian Brauner authored
This adds a stress test that should hopefully help us catch regressions for [1], [2], and [3]. [1]: 2669b8b0 ("binder: prevent UAF for binderfs devices") [2]: f0fe2c0f ("binder: prevent UAF for binderfs devices II") [3]: 211b64e4 ("binderfs: use refcount for binder control devices too") Signed-off-by:
Christian Brauner <christian.brauner@ubuntu.com> Reviewed-by:
Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20200313152420.138777-3-christian.brauner@ubuntu.comSigned-off-by:
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Christian Brauner authored
Unprivileged users will be able to create directories in there. The unprivileged test for /dev wouldn't have worked on most systems. Signed-off-by:
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Christian Brauner authored
Makes for nicer output and prepares for additional tests. Signed-off-by:
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Christian Brauner authored
When I first wrote binderfs the new mount api had not yet landed. Now that it has been around for a little while and a bunch of filesystems have already been ported we should do so too. When Al sent his mount-api-conversion pr he requested that binderfs (and a few others) be ported separately. It's time we port binderfs. We can make use of the new option parser, get nicer infrastructure and it will be easier if we ever add any new mount options. This survives testing with the binderfs selftests: for i in `seq 1 1000`; do ./binderfs_test; done including the new stress tests I sent out for review today: TAP version 13 1..1 # selftests: filesystems/binderfs: binderfs_test # [==========] Running 3 tests from 1 test cases. # [ RUN ] global.binderfs_stress # [ XFAIL! ] Tests are not run as root. Skipping privileged tests # [==========] Running 3 tests from 1 test cases. # [ RUN ] global.binderfs_stress # [ OK ] global.binderfs_stress # [ RUN ] global.binderfs_test_privileged # [ OK ] global.binderfs_test_privileged # [ RUN ] global.binderfs_test_unprivileged # # Allocated new binder device with major 243, minor 4, and name my-binder # # Detected binder version: 8 # [==========] Running 3 tests from 1 test cases. # [ RUN ] global.binderfs_stress # [ OK ] global.binderfs_stress # [ RUN ] global.binderfs_test_privileged # [ OK ] global.binderfs_test_privileged # [ RUN ] global.binderfs_test_unprivileged # [ OK ] global.binderfs_test_unprivileged # [==========] 3 / 3 tests passed. # [ PASSED ] ok 1 selftests: filesystems/binderfs: binderfs_test Cc: Todd Kjos <tkjos@google.com> Signed-off-by:
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Chanwoo Choi authored
The commit tb7365587 ("extcon: Remove unneeded extern keyword from extcon.h") removes the unneeded extern keyword from extcon header file. But, The commit tb7365587 has missed that deletes 'extern' keyword from extcon-provider.h. So that it deletes extern keyword from extcon-provider.h. Signed-off-by:
Chanwoo Choi <cw00.choi@samsung.com> Link: https://lore.kernel.org/r/20200217104728.29330-1-cw00.choi@samsung.comSigned-off-by:
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- 18 Mar, 2020 5 commits
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Alexandru Ardelean authored
This change makes use of the new devm_uio_register_device() initializer. This cleans up the exit path quite nicely, and removes the remove function of the driver. Signed-off-by:
Alexandru Ardelean <alexandru.ardelean@analog.com> Link: https://lore.kernel.org/r/20200306161853.25368-2-alexandru.ardelean@analog.comSigned-off-by:
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Alexandru Ardelean authored
This change adds a resource managed equivalent of uio_register_device(). Not adding devm_uio_unregister_device(), since the intent is to discourage it's usage. Having such a function may allow some bad driver designs. Most users of devm_*register*() functions rarely use the unregister equivalents. Signed-off-by:
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Qiang Su authored
Whitespace is used in the inapposite place, which makes checkpatch complain. Signed-off-by:
Qiang Su <suqiang4@huawei.com> Link: https://lore.kernel.org/r/20200306070359.71398-1-suqiang4@huawei.comSigned-off-by:
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Anson Huang authored
Add COMPILE_TEST support to i.MX SCU drivers for better compile testing coverage. Signed-off-by:
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Zhenzhong Duan authored
FLASH_MINOR is used in both drivers/char/nwflash.c and drivers/sbus/char/flash.c with conflict minor numbers. Move all the definitions of FLASH_MINOR into miscdevice.h. Rename FLASH_MINOR for drivers/char/nwflash.c to NWFLASH_MINOR and FLASH_MINOR for drivers/sbus/char/flash.c to SBUS_FLASH_MINOR. Link: https://lore.kernel.org/lkml/20200120221323.GJ15860@mit.edu/t/Suggested-by:
Zhenzhong Duan <zhenzhong.duan@gmail.com> Acked-by:
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