- 09 Jun, 2017 40 commits
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Heiner Kallweit authored
Adding entries to nvmem_cells and deleting entries from it is protected by nvmem_cells_mutex. Therefore this mutex should also protect iterating over the list. Signed-off-by:
Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by:
Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Andrey Smirnov authored
Call put_device() in nvmem_unregister() to make sure nvmem_release gets called freeing up allocated resources. Cc: cphealy@gmail.com Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by:
Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by:
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Johan Hovold authored
Make sure to deregister and release the nvmem device and underlying memory on registration errors. Note that the private data must be freed using put_device() once the struct device has been initialised. Also note that there's a related reference leak in the deregistration function as reported by Mika Westerberg which is being fixed separately. Fixes: b6c217ab ("nvmem: Add backwards compatibility support for older EEPROM drivers.") Fixes: eace75cf ("nvmem: Add a simple NVMEM framework for nvmem providers") Cc: stable <stable@vger.kernel.org> # 4.3 Cc: Andrew Lunn <andrew@lunn.ch> Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Cc: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by:
Johan Hovold <johan@kernel.org> Acked-by:
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Oza Pawandeep authored
- use data write offset to write otp data instead of read offset - use OTP program command 0x8 to write otp with ECC rather than just command 0xA without ECC Fixes: 9d59c6e8 ("nvmem: Add the Broadcom OTP controller driver") Signed-off-by:
Oza Pawandeep <oza.oza@broadcom.com> Signed-off-by:
Scott Branden <scott.branden@broadcom.com> Signed-off-by:
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Andrew F. Davis authored
Like other subsystems we should be able to define slave devices outside of the w1 directory. To do this we move public facing interface definitions to include/linux/w1.h and rename the internal definition file to w1_internal.h. As w1_family.h and w1_int.h contained almost entirely public driver interface definitions we simply removed these files and moved the remaining definitions into w1_internal.h. With this we can now start to move slave devices out of w1/slaves and into the subsystem based on the function they implement, again like other drivers. Signed-off-by:
Andrew F. Davis <afd@ti.com> Reviewed-by:
Sebastian Reichel <sre@kernel.org> Acked-by:
Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by:
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Christopher Bostic authored
Add missing MODULE_LICENSE("GPL") to the core FSI driver. Signed-off-by:Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by:
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Jeremy Kerr authored
For slaves that are behind a software-clocked master, we want FSI CFAMs to run asynchronously to the FSI clock, so set up our slaves to be in async mode. Signed-off-by:
Jeremy Kerr <jk@ozlabs.org> Signed-off-by:
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Christopher Bostic authored
Add an engine driver to expose a "hub" FSI master - which has a set of control registers in the engine address space, and uses a chunk of the slave address space for actual FSI communication. Additional changes from Jeremy Kerr <jk@ozlabs.org>. Signed-off-by:
Joel Stanley <joel@jms.id.au> Signed-off-by:
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Christopher Bostic authored
Create a simple SCOM engine device driver that reads and writes its control registers via an FSI bus. Includes changes from Edward A. James <eajames@us.ibm.com>. Signed-off-by:
Edward A. James <eajames@us.ibm.com> Signed-off-by:
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Jeremy Kerr authored
Trace low level input/output GPIO operations. Signed-off-by:
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Christopher Bostic authored
Implement a FSI master using GPIO. Will generate FSI protocol for read and write commands to particular addresses. Sends master command and waits for and decodes a slave response. Includes changes from Edward A. James <eajames@us.ibm.com> and Jeremy Kerr <jk@ozlabs.org>. Signed-off-by:
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Christopher Bostic authored
Add info for sysfs scan file in Documentaiton ABI/testing Signed-off-by:
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Jeremy Kerr authored
This change implements error handling in the FSI core, by cleaining up and retrying failed operations, using the SISC, TERM and BREAK facilities. Signed-off-by:
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Jeremy Kerr authored
Trace low level read and write FSI bus operations. Signed-off-by:
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Jeremy Kerr authored
Allow drivers to access the slave address ranges. Signed-off-by:
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Jeremy Kerr authored
This change adds a 'raw' file for reads & writes, and a 'term' file for the TERM command, and a 'break' file for issuing a BREAK. Signed-off-by:
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Christopher Bostic authored
Add driver_register and driver_unregister wrappers for FSI. Signed-off-by:
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Christopher Bostic authored
Add fsi master gpio device tree binding documentation. Includes changes from Jeremy Kerr <jk@ozlabs.org>. Signed-off-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Christopher Bostic authored
Allow a master to undo a previous scan. Should a master scan a bus twice it will need to ensure it doesn't double register any previously detected device. Signed-off-by:
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Jeremy Kerr authored
This change introduces the fsi device API: simple read, write and peek accessors for the devices' address spaces. Includes contributions from Christopher Bostic <cbostic@linux.vnet.ibm.com> and Edward A. James <eajames@us.ibm.com>. Signed-off-by:
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Jeremy Kerr authored
Now that we have fsi_slave devices, scan each for endpoints, and register them on the fsi bus. Includes contributions from Christopher Bostic <cbostic@linux.vnet.ibm.com>. Signed-off-by:
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Christopher Bostic authored
Set CFAM to appropriate ID so that the controlling master can manage link memory ranges. Add slave engine register definitions. Includes changes from Jeremy Kerr <jk@ozlabs.org>. Signed-off-by:
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Jeremy Kerr authored
Implement fsi_slave_init: if we can read a chip ID, create fsi_slave devices and register with the driver core. Includes changes from Christopher Bostic <cbostic@linux.vnet.ibm.com>. Signed-off-by:
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Christopher Bostic authored
Enable each link and send a break command, and try to detect a slave by reading from the SMODE register. Signed-off-by:
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Jeremy Kerr authored
Introduce functions to perform reads/writes on the slave address space; these simply pass the request on the slave's master with the correct link and slave ID. We implement these on top of similar helpers for the master. Signed-off-by:
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Jeremy Kerr authored
Add a little helper for crc4 calculations. This works 4-bits-at-a-time, using a simple table approach. We will need this in the FSI core code, as well as any master implementations that need to calculate CRCs in software. Signed-off-by:
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Jeremy Kerr authored
When a new fsi master is added, we will need to scan its links, and slaves attached to those links. This change introduces a little shell to iterate the links, which we will populate with the actual slave scan in a later change. Signed-off-by:
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Jeremy Kerr authored
Add the initial fsi slave device, which is private to the core code. This will be a child of the master, and parent to endpoint devices. Signed-off-by:
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Jeremy Kerr authored
Add a `struct fsi_master` to represent a FSI master controller. FSI master drivers register one of these structs to provide device-specific of the standard operations: read/write/term/break and link control. Includes changes from Edward A. James <eajames@us.ibm.com> & Jeremy Kerr <jk@ozlabs.org>. Signed-off-by:
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Roberto Pereira authored
Disable Network file system support. Reviewed-at: https://android-review.googlesource.com/#/c/409559/Signed-off-by:
Roberto Pereira <rpere@google.com> [AmitP: cherry-picked this change from Android common kernel and updated commit message] Signed-off-by:
Amit Pundir <amit.pundir@linaro.org> Signed-off-by:
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Chenbo Feng authored
Add CONFIG_CGROUP_BPF as a default configuration in android base config since it is used to replace XT_QTAGUID in future. Reviewed-at: https://android-review.googlesource.com/#/c/400374/Signed-off-by:
Chenbo Feng <fengc@google.com> [AmitP: cherry-picked this change from Android common kernel] Signed-off-by:
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Greg Kroah-Hartman authored
This adds CONFIG_MODULES, CONFIG_MODULE_UNLOAD, and CONFIG_MODVERSIONS which are required by the O release. Reviewed-at: https://android-review.googlesource.com/#/c/364554/Signed-off-by:
Greg Kroah-Hartman <gregkh@google.com> [AmitP: cherry-picked this change from Android common kernel] Signed-off-by:
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Greg Kroah-Hartman authored
This adds CONFIG_IKCONFIG and CONFIG_IKCONFIG_PROC options, which are a requirement for the O release. Reviewed-at: https://android-review.googlesource.com/#/c/364553/Signed-off-by:
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Sami Tolvanen authored
Enable CPU domain PAN to ensure that normal kernel accesses are unable to access userspace addresses. Reviewed-at: https://android-review.googlesource.com/#/c/334035/Signed-off-by:
Sami Tolvanen <samitolvanen@google.com> [AmitP: cherry-picked this change from Android common kernel, updated the commit message and re-placed the CONFIG_STRICT_KERNEL_RWX config in sorted order] Signed-off-by:
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Max Shi authored
Turn off the two kernel configs to disable related system ABI. Reviewed-at: https://android-review.googlesource.com/#/c/264976/Signed-off-by:
Max Shi <meixuanshi@google.com> [AmitP: cherry-picked this change from Android common kernel] Signed-off-by:
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Sami Tolvanen authored
Enable PAN emulation using TTBR0_EL1 switching. Reviewed-at: https://android-review.googlesource.com/#/c/325997/Signed-off-by:
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Jeff Vander Stoep authored
If compiler has stack protector support, set CONFIG_CC_STACKPROTECTOR_STRONG. Reviewed-at: https://android-review.googlesource.com/#/c/238388/Signed-off-by:
Jeff Vander Stoep <jeffv@google.com> [AmitP: cherry-picked this change from Android common kernel] Signed-off-by:
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Leo Yan authored
Add debug unit on Qualcomm msm8916 based platforms, including the DragonBoard 410c board. Signed-off-by:
Leo Yan <leo.yan@linaro.org> Reviewed-by:
Mathieu Poirier <mathieu.poirier@linaro.org> Acked-by:
Andy Gross <andy.gross@linaro.org> Signed-off-by:
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Leo Yan authored
Bind debug module driver for Hi6220. Signed-off-by:
Wei Xu <xuwei5@hisilicon.com> Signed-off-by:
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Leo Yan authored
Coresight includes debug module and usually the module connects with CPU debug logic. ARMv8 architecture reference manual (ARM DDI 0487A.k) has description for related info in "Part H: External Debug". Chapter H7 "The Sample-based Profiling Extension" introduces several sampling registers, e.g. we can check program counter value with combined CPU exception level, secure state, etc. So this is helpful for analysis CPU lockup scenarios, e.g. if one CPU has run into infinite loop with IRQ disabled. In this case the CPU cannot switch context and handle any interrupt (including IPIs), as the result it cannot handle SMP call for stack dump. This patch is to enable coresight debug module, so firstly this driver is to bind apb clock for debug module and this is to ensure the debug module can be accessed from program or external debugger. And the driver uses sample-based registers for debug purpose, e.g. when system triggers panic, the driver will dump program counter and combined context registers (EDCIDSR, EDVIDSR); by parsing context registers so can quickly get to know CPU secure state, exception level, etc. Some of the debug module registers are located in CPU power domain, so this requires the CPU power domain stays on when access related debug registers, but the power management for CPU power domain is quite dependent on SoC integration for power management. For the platforms which with sane power controller implementations, this driver follows the method to set EDPRCR to try to pull the CPU out of low power state and then set 'no power down request' bit so the CPU has no chance to lose power. If the SoC has not followed up this design well for power management controller, the user should use the command line parameter or sysfs to constrain all or partial idle states to ensure the CPU power domain is enabled and access coresight CPU debug component safely. Signed-off-by:
Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by:
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