- 08 Apr, 2017 40 commits
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Thierry Escande authored
This patch expands the Google firmware memory console driver to also work on certain tree based platforms running coreboot, such as ARM/ARM64 Chromebooks. This patch now adds another path to find the coreboot table through the device tree. In order to find that, a second level bootloader must have installed the 'coreboot' compatible device tree node that describes its base address and size. This patch is a rework/split/merge of patches from the chromeos v4.4 kernel tree originally authored by: Wei-Ning Huang <wnhuang@chromium.org> Julius Werner <jwerner@chromium.org> Brian Norris <briannorris@chromium.org> Signed-off-by:
Thierry Escande <thierry.escande@collabora.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Julius Werner authored
This patch adds documentation describing a device tree binding for the coreboot firmware. It is meant to be dynamically added during boot and contains address definitions for the coreboot table (a list of variable-sized descriptors providing information about various compile- and run-time generated firmware parameters) and the CBMEM area (the structure containing most run-time resident memory regions set up by coreboot). These definitions allow kernel drivers to easily access data contained in and pointed to by these regions (such as coreboot's in-memory log). (An example implementation can be seen in the following patch) Signed-off-by:
Julius Werner <jwerner@chromium.org> Signed-off-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Thierry Escande authored
Coreboot (http://www.coreboot.org) allows to save the firmware console output in a memory buffer. With this patch, the address of this memory buffer is obtained from coreboot tables on x86 chromebook devices declaring an ACPI device with name matching GOOGCB00 or BOOT0000. If the memconsole-coreboot driver is able to find the coreboot table, the memconsole driver sets the cbmem_console address and initializes the memconsole sysfs entries. The coreboot_table-acpi driver is responsible for setting the address of the coreboot table header when probed. If this address is not yet set when memconsole-coreboot is probed, then the probe is deferred by returning -EPROBE_DEFER. This patch is a rework/split/merge of patches from the chromeos v4.4 kernel tree originally authored by: Vadim Bendebury <vbendeb@chromium.org> Wei-Ning Huang <wnhuang@google.com> Yuji Sasaki <sasakiy@google.com> Duncan Laurie <dlaurie@chromium.org> Julius Werner <jwerner@chromium.org> Brian Norris <briannorris@chromium.org> Signed-off-by:
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Thierry Escande authored
This patch splits memconsole.c in 2 parts. One containing the architecture-independent part and the other one containing the EBDA specific part. This prepares the integration of coreboot support for the memconsole. The memconsole driver is now named as memconsole-x86-legacy. Signed-off-by:
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Thierry Escande authored
This patch removes the "Google Firmware Drivers" menu containing a menuconfig entry with the exact same name. The menuconfig is now directly under the "Firmware Drivers" entry. Signed-off-by:
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Saul Wold authored
Most Linux distributions contain awk in /usr/bin by default, not in /bin. This script's suggested use is for creating version information for bug reporting. This has been tested on a number of different distributions, including Fedora, Ubuntu, OpenSUSE, Debian, Centos, Arch Linuxi, and Poky! Signed-off-by:
Saul Wold <sgw@linux.intel.com> Reviewed-by:
Alexander Kapshuk <alexander.kapshuk@gmail.com> Reviewed-by:
Mark Gross <mgross@linux.intel.com> Signed-off-by:
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Arnd Bergmann authored
I ran into a link error on ARM64 for lkdtm_rodata_do_nothing: drivers/misc/built-in.o: In function `lkdtm_rodata_do_nothing': :(.rodata+0x68c8): relocation truncated to fit: R_AARCH64_CALL26 against symbol `__sanitizer_cov_trace_pc' defined in .text section in kernel/built-in.o I did not analyze this further, but my theory is that we would need a trampoline to call __sanitizer_cov_trace_pc(), but the linker (correctly) only adds trampolines for callers in executable sections. Disabling KCOV for this one file avoids the build failure with no other practical downsides I can think of. The problem can only happen on kernels that contain both kcov and lkdtm, so if we want to backport this, it should be in the earliest version that has both (v4.8). Fixes: 5c9a8750 ("kernel: add kcov code coverage") Fixes: 9a49a528 ("lkdtm: add function for testing .rodata section") Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Acked-by:
Dmitry Vyukov <dvyukov@google.com> Acked-by:
Kees Cook <keescook@chromium.org> Signed-off-by:
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Kees Cook authored
This adds CORRUPT_USER_DS to check that the get_fs() test on syscall return (via __VERIFY_PRE_USERMODE_STATE) still sees USER_DS. Since trying to deal with values other than USER_DS and KERNEL_DS across all architectures in a safe way is not sensible, this sets KERNEL_DS, but since that could be extremely dangerous if the protection is not present, it also raises SIGKILL for current, so that no matter what, the process will die. A successful test will be visible with a BUG(), like all the other LKDTM tests. Signed-off-by:
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Varsha Rao authored
Replace printk with pr_err to fix the checkpatch issue. Signed-off-by:
Varsha Rao <rvarsha016@gmail.com> Signed-off-by:
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Varsha Rao authored
Add a blank line after declaration, to fix the checkpatch issue. Signed-off-by:
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Varsha Rao authored
Add space which is required after ',' to follow linux coding style. This patch fixes the checkpatch issue. Signed-off-by:
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Varsha Rao authored
Remove space after * in pointer type, to follow linux coding style. This patch fixes the following checkpatch issue: ERROR: "foo * bar" should be "foo *bar" Signed-off-by:
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Richard Leitner authored
Implement write routine for OCOTP controller found in i.MX6 SoC's. Furthermore add locking to the read function to prevent race conditions. The write routine code is based on the fsl_otp driver from Freescale. Signed-off-by:
Richard Leitner <richard.leitner@skidata.com> Signed-off-by:
Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by:
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Richard Leitner authored
When reading a "read locked" value from the OCOTP controller on i.MX6 SoC's an error bit is set. This bit has to be cleared by software before any new write, read or reload access can be issued. Therefore clear it after we detect such an "locked read". Signed-off-by:
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Peng Fan authored
Add i.MX7D support. There is 16 banks, each bank 4 words. Signed-off-by:
Peng Fan <peng.fan@nxp.com> Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Shawn Guo <shawnguo@kernel.org> Signed-off-by:
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Peng Fan authored
Add compatible string for i.MX7D/S Signed-off-by:
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Sascha Hauer authored
The IIM is part of the i.MX device trees for long already, add a binding document for it. Signed-off-by:
Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by:
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Michael Grzeschik authored
This adds a readonly nvmem driver for the i.MX IC Identification Module (IIM). The IIM is found on the older i.MX SoCs like the i.MX25, i.MX27, i.MX31, i.MX35, i.MX51 and the i.MX53. The IIM can control up to 8 fuse banks with 256 bit each. Not all of the banks are equipped on the different SoCs. The actual number of fuses differ from 512 on the i.MX27 and 1152 on the i.MX53. The fuses are one time writable, but writing is currently not supported in the driver. Signed-off-by:
Michael Grzeschik <m.grzeschik@pengutronix.de> Signed-off-by:
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Richard Leitner authored
Assign the correct dev pointer to struct ocotp_priv during probe. This is needed to display dev_* messages correctly. Furthermore harmonize the usage of dev (instead of &pdev->dev) in the probe function. Signed-off-by:
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Icenowy Zheng authored
The H3 SoC have a bigger SID controller, which has its direct read address at 0x200 position in the SID block, not 0x0. Also, H3 SID controller has some silicon bug that makes the direct read value wrong at cold boot, add code to workaround the bug. (This bug has already been fixed on A64 and later SoCs) Signed-off-by:
Icenowy Zheng <icenowy@aosc.xyz> Acked-by:
Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by:
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Icenowy Zheng authored
Sometimes the SID device have more memory address space than the real NVMEM size (for the registers used to read/write the SID). Fetch the NVMEM size from device compatible, rather than the memory address space's length, in order to prepare for adding some registers-based read support. Signed-off-by:
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Aban Bedel authored
Currently the nvmem core expect the config to provide a name and ID that are then used to create the device name. When no device name is given 'nvmem' is used. However if there is several such anonymous devices they all get named 'nvmem0', which doesn't work. To fix this problem use the ID from the config only when the config also provides a name. When no name is provided take the uinque ID of the nvmem device instead. Signed-off-by:
Aban Bedel <albeu@free.fr> Reviewed-by:
Moritz Fischer <mdf@kernel.org> Signed-off-by:
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Maxime Ripard authored
I've never been really been maintaining nvmem, so make that official. Signed-off-by:
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Moritz Fischer authored
This adds support for the Xilinx LogiCORE PR Decoupler soft-ip that does decoupling of PR regions in the FPGA fabric during partial reconfiguration. Signed-off-by:
Michal Simek <michal.simek@xilinx.com> Cc: Sören Brinkmann <soren.brinkmann@xilinx.com> Cc: linux-kernel@vger.kernel.org Cc: devicetree@vger.kernel.org Acked-by:
Alan Tull <atull@kernel.org> Signed-off-by:
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Andy Shevchenko authored
It looks like arm-charlcd.c belongs to auxdisplay subsystem. Move it to drivers/auxdisplay folder. No functional changes intended. Reviewed-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by:
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Andy Shevchenko authored
It looks like panel.c belongs to auxdisplay subsystem. Move it to drivers/auxdisplay folder. No functional changes intended. Acked-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
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Dmitry Torokhov authored
The data read from the device is 3 little-endian words, so let's annotate them as such and use le16_to_cpu() to convert them to host endianness - it might turn out to be a bit more performant, and it expresses the conversion more clearly. Signed-off-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by:
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Javier Martinez Canillas authored
If the driver is built as a module, autoload won't work because the module alias information is not filled. So user-space can't match the registered device with the corresponding module. Export the module alias information using the MODULE_DEVICE_TABLE() macro. Before this patch: $ modinfo drivers/auxdisplay/img-ascii-lcd.ko | grep alias $ After this patch: $ modinfo drivers/auxdisplay/img-ascii-lcd.ko | grep alias alias: of:N*T*Cmti,sead3-lcdC* alias: of:N*T*Cmti,sead3-lcd alias: of:N*T*Cmti,malta-lcdC* alias: of:N*T*Cmti,malta-lcd alias: of:N*T*Cimg,boston-lcdC* alias: of:N*T*Cimg,boston-lcd Signed-off-by:
Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by:
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Arnd Bergmann authored
gcc-7.0.1 points out that we copy uninitialized data from the stack into a per-device structure: drivers/auxdisplay/ht16k33.c: In function 'ht16k33_keypad_irq_thread': arch/x86/include/asm/string_32.h:78:16: error: 'new_state' may be used uninitialized in this function [-Werror=maybe-uninitialized] arch/x86/include/asm/string_32.h:79:22: error: '*((void *)&new_state+4)' may be used uninitialized in this function [-Werror=maybe-uninitialized] The access is harmless because we never read the data, but we are better off not doing this, so this changes the code to only copy the data that was actually initialized. To make sure we don't overflow the stack with an incorrect DT, we also need to add a sanity checkin the probe function. Signed-off-by:
Robin van der Gracht <robin@protonic.nl> Reviewed-by:
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Geert Uytterhoeven authored
DT properties specifying physical properties should contain appropriate suffices indicating the units of measurement. Hence amend the HD44780 DT bindings to add "chars" suffixes to the "display-height" and "display-width" properties, and update the driver to parse them. Fixes: dd9502a9 ("dt-bindings: auxdisplay: Add bindings for Hitachi HD44780") Fixes: d47d8836 ("auxdisplay: Add HD44780 Character LCD support") Signed-off-by:
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Alan Tull authored
A few updates: * Updating my email address * Adding another docs directory: Documentation/fpga * Making the include path not specific to fpga-mgr.h only Signed-off-by:
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Geert Uytterhoeven authored
Submitters of device tree binding documentation may forget to CC the subsystem maintainer if this is missing. Signed-off-by:
Moritz Fischer <moritz.fischer@ettus.com> Cc: Alan Tull <atull@opensource.altera.com> Cc: Moritz Fischer <moritz.fischer@ettus.com> Cc: linux-fpga@vger.kernel.org Acked-by:
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Matthew Gerlach authored
This adds a platform bus driver for a fpga-mgr driver that uses the Altera Partial Reconfiguration IP component. Signed-off-by:
Matthew Gerlach <matthew.gerlach@linux.intel.com> Acked-by:
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Matthew Gerlach authored
Device Tree bindings for Altera Partial Reconfiguration IP. Signed-off-by:
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Matthew Gerlach authored
Adding the core functions necessary for a fpga-mgr driver for the Altera Partial IP component. It is intended for these functions to be used by the various bus implementations like the platform bus or the PCIe bus. Signed-off-by:
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Alan Tull authored
Adding timeout for maximum allowed time for FPGA to go to operating mode after a FPGA region has been programmed. Signed-off-by:
Alan Tull <atull@opensource.altera.com> Signed-off-by:
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Anatolij Gustschin authored
The driver loads FPGA firmware over SPI, using the "slave serial" configuration interface on Xilinx FPGAs. Signed-off-by:
Anatolij Gustschin <agust@denx.de> Acked-by:
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Anatolij Gustschin authored
Add dt binding documentation details for Xilinx FPGA configuration over slave serial interface. Signed-off-by:
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Moritz Fischer authored
The ops are not changing, make them const. Signed-off-by:
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Mike Leach authored
Corrected to get the port numbering to allow programmable replicator driver to operate correctly. By convention, CoreSight devices number ports, not endpoints in the .dts files:- port { reg<N> endpoint { } } Existing code read endpoint number - always 0x0, rather than the correct port number. Signed-off-by:Mike Leach <mike.leach@linaro.org> Signed-off-by:
Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by:
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