- 16 Jul, 2018 5 commits
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Dan Carpenter authored
The gnss_allocate_device() function returns a mix of NULL and error pointers on error. It should only return one or the other. Since the callers both check for NULL, I've modified it to return NULL on error. Fixes: 2b6a4403 ("gnss: add GNSS receiver subsystem") Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Colin Ian King authored
The structure ubx_gserial_ops is local to the source and does not need to be in global scope, so make it static. Cleans up sparse warning: symbol 'ubx_gserial_ops' was not declared. Should it be static? Signed-off-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
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Tuomas Tynkkynen authored
Simplifies the code and is more conventional to what's used in the rest of the kernel for debugfs ops. Signed-off-by:
Tuomas Tynkkynen <tuomas@tuxera.com> Reviewed-by:
Amit Shah <amit@kernel.org> Signed-off-by:
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Colin Ian King authored
Variable i is being assigned but is never used hence it is redundant and can be removed. Cleans up clang warning: warning: variable 'i' set but not used [-Wunused-but-set-variable] Signed-off-by:
Martyn Welch <martyn@welchs.me.uk> Signed-off-by:
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Greg Kroah-Hartman authored
We want the char-misc fixes in here as well. Signed-off-by:
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- 15 Jul, 2018 35 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull ARM SoC fixes from Olof Johansson: - A fix for OMAP5 and DRA7 to make the branch predictor hardening settings take proper effect on secondary cores - Disable USB OTG on am3517 since current driver isn't working - Fix thermal sensor register settings on Armada 38x - Fix suspend/resume IRQs on pxa3xx * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: dts: am3517.dtsi: Disable reference to OMAP3 OTG controller ARM: DRA7/OMAP5: Enable ACTLR[0] (Enable invalidates of BTB) for secondary cores ARM: pxa: irq: fix handling of ICMR registers in suspend/resume ARM: dts: armada-38x: use the new thermal binding
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Gustavo A. R. Silva authored
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Signed-off-by:
Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by:
Sudip Mukherjee <sudipm.mukherjee@gmail.com> Signed-off-by:
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Julia Lawall authored
Return an error code on failure. Change leading spaces to tab on the first if. Problem found using Coccinelle. Signed-off-by:
Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by:
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Greg Kroah-Hartman authored
When importing the latest copy of the kernel headers into Bionic, Christpher and Elliott noticed that the eventpoll.h casts were not wrapped in (). As it is, clang complains about macros without surrounding (), so this makes it a pain for userspace tools. So fix it up by adding another () pair, and make them line up purty by using tabs. Fixes: 65aaf87b ("add EPOLLNVAL, annotate EPOLL... and event_poll->event") Reported-by:
Christopher Ferris <cferris@google.com> Reported-by:
Elliott Hughes <enh@google.com> Cc: stable <stable@vger.kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Anson Huang authored
i.MX6SLL is a new SoC of i.MX6 family, enable ocotp driver support for this SoC. Signed-off-by:
Anson Huang <Anson.Huang@nxp.com> Signed-off-by:
Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by:
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Anson Huang authored
Add new compatible string for i.MX6SLL SOC. Signed-off-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Freeman Liu authored
This patch add the efuse driver which is embeded in Spreadtrum SC27XX series PMICs. The sc27xx efuse contains 32 blocks and each block's data width is 16 bits. Signed-off-by:
Freeman Liu <freeman.liu@spreadtrum.com> Signed-off-by:
Baolin Wang <baolin.wang@linaro.org> Signed-off-by:
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Baolin Wang authored
This patch adds the binding documentation for Spreadtrum SC27XX series PMICs efuse controller device. Signed-off-by:
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Wu Hao authored
Add entry for FPGA Device Feature List (DFL) drivers. Signed-off-by:
Wu Hao <hao.wu@intel.com> Acked-by:
Alan Tull <atull@kernel.org> Acked-by:
Moritz Fischer <mdf@kernel.org> Signed-off-by:
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Wu Hao authored
DMA memory regions are required for Accelerated Function Unit (AFU) usage. These two ioctls allow user space applications to map user memory regions for dma, and unmap them after use. Iova is returned from driver to user space application via DFL_FPGA_PORT_DMA_MAP ioctl. Application needs to unmap it after use, otherwise, driver will unmap them in device file release operation. Each AFU has its own rb tree to keep track of its mapped DMA regions. Ioctl interfaces: * DFL_FPGA_PORT_DMA_MAP Do the dma mapping per user_addr and length provided by user. Return iova in provided struct dfl_fpga_port_dma_map. * DFL_FPGA_PORT_DMA_UNMAP Unmap the dma region per iova provided by user. Signed-off-by:
Tim Whisonant <tim.whisonant@intel.com> Signed-off-by:
Enno Luebbers <enno.luebbers@intel.com> Signed-off-by:
Shiva Rao <shiva.rao@intel.com> Signed-off-by:
Christopher Rauer <christopher.rauer@intel.com> Signed-off-by:
Xiao Guangrong <guangrong.xiao@linux.intel.com> Signed-off-by:
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Xiao Guangrong authored
User Accelerated Function Unit sub feature exposes the MMIO region of the AFU. After valid PR bitstream is programmed and the port is enabled, then this MMIO region could be accessed. This patch adds support to enumerate the AFU MMIO region and expose it to userspace via mmap file operation. Below interfaces are exposed to user: Sysfs interface: * /sys/class/fpga_region/<regionX>/<dfl-port.x>/afu_id Read-only. Indicate which PR bitstream is programmed to this AFU. Ioctl interfaces: * DFL_FPGA_PORT_GET_INFO Provide info to userspace on the number of supported region. Only UAFU region is supported now. * DFL_FPGA_PORT_GET_REGION_INFO Provide region information, including access permission, region size, offset from the start of device fd. Signed-off-by:
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Wu Hao authored
DFL_FPGA_GET_API_VERSION and DFL_FPGA_CHECK_EXTENSION ioctls are common ones which need to be supported by all feature devices drivers including FME and AFU. This patch implements above 2 ioctls in FPGA Accelerated Function Unit (AFU) driver. Signed-off-by:
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Wu Hao authored
The port header register set is always present for port, it is mainly for capability, control and status of the ports that AFU connected to. This patch implements header sub feature support. Below user interfaces are created by this patch. Sysfs interface: * /sys/class/fpga_region/<regionX>/<dfl-port.x>/id Read-only. Port ID. Ioctl interface: * DFL_FPGA_PORT_RESET Reset the FPGA Port and its AFU. Signed-off-by:
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Wu Hao authored
This patch registers the port ops into the global list in the DFL framework, and it allows other modules to use the port ops. And This patch includes the implementation of the get_id and enable_set ops too. Signed-off-by:
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Wu Hao authored
On DFL FPGA devices, the Accelerated Function Unit (AFU), can be reprogrammed for different functions. It connects to the FPGA infrastructure (static FPGA region) via a Port. Port CSRs are implemented separately from the AFU CSRs to provide control and status of the Port. Once valid PR bitstream is programmed into the AFU, it allows access to the AFU CSRs in the AFU MMIO space. This patch only implements basic driver framework for AFU, including device file operation framework. Signed-off-by:
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Wu Hao authored
This patch adds compat_id support, it reuses fme manager's compat id, as the per region compat id is actually from the fme manager's register. Signed-off-by:
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Wu Hao authored
This patch adds fpga region platform driver for FPGA Management Engine. It register an fpga region with given fpga manager / bridge device. Signed-off-by:
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Wu Hao authored
This patch adds fpga bridge platform driver for FPGA Management Engine. It implements the enable_set callback for fpga bridge. Signed-off-by:
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Wu Hao authored
This patch adds compat_id support to fme manager driver, it reads the ID from the hardware register. And it could be used for compatibility check before partial reconfiguration. Signed-off-by:
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Wu Hao authored
This patch adds fpga manager driver for FPGA Management Engine (FME). It implements fpga_manager_ops for FPGA Partial Reconfiguration function. Signed-off-by:
Kang Luwei <luwei.kang@intel.com> Signed-off-by:
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Kang Luwei authored
Partial Reconfiguration (PR) is the most important function for FME. It allows reconfiguration for given Port/Accelerated Function Unit (AFU). It creates platform devices for fpga-mgr, fpga-regions and fpga-bridges, and invokes fpga-region's interface (fpga_region_program_fpga) for PR operation once PR request received via ioctl. Below user space interface is exposed by this sub feature. Ioctl interface: * DFL_FPGA_FME_PORT_PR Do partial reconfiguration per information from userspace, including target port(AFU), buffer size and address info. It returns error code to userspace if failed. For detailed PR error information, user needs to read fpga-mgr's status sysfs interface. Signed-off-by:
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Wu Hao authored
DFL_FPGA_GET_API_VERSION and DFL_FPGA_CHECK_EXTENSION ioctls are common ones which need to be supported by all feature devices drivers including FME and AFU. Userspace application can use these ioctl interfaces to get the API info and check if specific extension is supported or not in current driver. This patch implements above 2 ioctls in FPGA Management Engine (FME) driver. Signed-off-by:
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Kang Luwei authored
The Header Register set is always present for FPGA Management Engine (FME), this patch implements init and uinit function for header sub feature and introduces several read-only sysfs interfaces for the capability and status. Sysfs interfaces: * /sys/class/fpga_region/<regionX>/<dfl-fme.x>/ports_num Read-only. Number of ports implemented * /sys/class/fpga_region/<regionX>/<dfl-fme.x>/bitstream_id Read-only. Bitstream (static FPGA region) identifier number. It contains the detailed version and other information of this static FPGA region. * /sys/class/fpga_region/<regionX>/<dfl-fme.x>/bitstream_metadata Read-only. Bitstream (static FPGA region) meta data. It contains the synthesis date, seed and other information of this static FPGA region. Signed-off-by:
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Kang Luwei authored
The FPGA Management Engine (FME) provides power, thermal management, performance counters, partial reconfiguration and other functions. For each function, it is packaged into a private feature linked to the FME feature device in the 'Device Feature List'. It's a platform device created by DFL framework. This patch adds the basic framework of FME platform driver. It defines sub feature drivers to handle the different sub features, including init, uinit and ioctl. It also registers the file operations for the device file. Signed-off-by:
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Wu Hao authored
The Device Feature List (DFL) is implemented in MMIO and features are linked via the DFLs. This patch enables pcie driver to prepare enumeration information (e.g. locations of all device feature lists in MMIO) and use common APIs provided by the Device Feature List framework to enumerate each feature device linked. Signed-off-by:
Zhang Yi <yi.z.zhang@intel.com> Signed-off-by:
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Zhang Yi authored
This patch implements the basic framework of the driver for FPGA PCIe device which implements the Device Feature List (DFL) in its MMIO space. This driver is verified on Intel(R) PCIe-based FPGA DFL devices, including both integrated (e.g. Intel Server Platform with In-package FPGA) and discrete (e.g. Intel FPGA PCIe Acceleration Cards) solutions. Signed-off-by:
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Wu Hao authored
This patch adds one common function in DFL framework. It uses port_ops get_id callback to get port id and compare it with given value. This function could be used as match function of the dfl_fpga_cdev_find_port function. Signed-off-by:
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Wu Hao authored
In some cases, other DFL driver modules may need to access some port operations, e.g. disable / enable port for partial reconfiguration in FME module. In order to avoid dependency between port and FME modules, this patch introduces the dfl_fpga_port_ops support in DFL framework. A global dfl_fpga_port_ops list is added in the DFL framework, and it allows other DFL modules to use these port operations registered to this list, even in virtualization case, the port platform device is turned into VF / guest VM and hidden in host, the registered port_ops is still usable. It resolves the dependency issues between modules, but once get port ops API returns a valid port ops, that means related port driver module has been module_get to prevent from unexpected unload, and put port ops API must be invoked after use. These APIs introduced by this patch is listed below: * dfl_fpga_port_ops_add add one port ops to the global list. * dfl_fpga_port_ops_del del one port ops from the global list. * dfl_fpga_port_ops_get / dfl_fpga_port_ops_put get/put the port ops before/after use. Signed-off-by:
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Xiao Guangrong authored
This patch abstracts the common operations of the sub features and defines the feature_ops data structure, including init, uinit and ioctl function pointers. And this patch adds some common helper functions for FME and AFU drivers, e.g. dfl_feature_dev_use_begin/end which are used to ensure exclusive usage of the feature device file. Signed-off-by:
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Wu Hao authored
For feature devices, we need a method to find the port dedicated to the device. This patch adds a function dfl_fpga_cdev_find_port for this purpose. e.g. FPGA Management Engine (FME) Partial Reconfiguration sub feature, it uses this function to find dedicated port on the device for PR function implementation. Signed-off-by:
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Wu Hao authored
For feature devices drivers, both the FPGA Management Engine (FME) and Accelerated Function Unit (AFU) driver need to expose user interfaces via the device file, for example, mmap and ioctls. This patch adds chardev support in the dfl driver for feature devices, FME and AFU. It reserves the chardev regions for FME and AFU and provide interfaces for FME and AFU driver to register their device file operations. Signed-off-by:
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Wu Hao authored
Device Feature List (DFL) defines a feature list structure that creates a linked list of feature headers within the MMIO space to provide an extensible way of adding features. This patch introduces a kernel module to provide basic infrastructure to support FPGA devices which implement the Device Feature List. Usually there will be different features and their sub features linked into the DFL. This code provides common APIs for feature enumeration, it creates a container device (FPGA base region), walks through the DFLs and creates platform devices for feature devices (Currently it only supports two different feature devices, FPGA Management Engine (FME) and Port which the Accelerator Function Unit (AFU) connected to). In order to enumerate the DFLs, the common APIs required low level driver to provide necessary enumeration information (e.g. address for each device feature list for given device) and fill it to the dfl_fpga_enum_info data structure. Please refer to below description for APIs added for enumeration. Functions for enumeration information preparation: *dfl_fpga_enum_info_alloc allocate enumeration information data structure. *dfl_fpga_enum_info_add_dfl add a device feature list to dfl_fpga_enum_info data structure. *dfl_fpga_enum_info_free free dfl_fpga_enum_info data structure and related resources. Functions for feature device enumeration: *dfl_fpga_feature_devs_enumerate enumerate feature devices and return container device. *dfl_fpga_feature_devs_remove remove feature devices under given container device. Signed-off-by:
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Wu Hao authored
This patch introduces a compat_id pointer member and sysfs interface for each fpga region, similar as compat_id for fpga manager, it allows applications to read the per region compat_id for compatibility checking before other actions on this fpga-region (e.g. PR). Signed-off-by:
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Wu Hao authored
This patch introduces compat_id support to fpga manager, it adds a fpga_compat_id pointer to fpga manager data structure to allow fpga manager drivers to save the compatibility id. This compat_id could be used for compatibility checking before doing partial reconfiguration to associated fpga regions. Signed-off-by:
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