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path: root/drivers/hwspinlock/Kconfig
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2021-05-27hwspinlock: add sun6i hardware spinlock supportWilken Gottwalt1-0/+9
Adds the sun6i_hwspinlock driver for the hardware spinlock unit found in most of the sun6i compatible SoCs. This unit provides at least 32 spinlocks in hardware. The implementation supports 32, 64, 128 or 256 32bit registers. A lock can be taken by reading a register and released by writing a 0 to it. This driver supports all 4 spinlock setups, but for now only the first setup (32 locks) seem to exist in available devices. This spinlock unit is shared between all ARM cores and the embedded companion core. All of them can take/release a lock with a single cycle operation. It can be used to sync access to devices shared by the ARM cores and the companion core. There are two ways to check if a lock is taken. The first way is to read a lock. If a 0 is returned, the lock was free and is taken now. If an 1 is returned, the caller has to try again. Which means the lock is taken. The second way is to read a 32bit wide status register where every bit represents one of the 32 first locks. According to the datasheets this status register supports only the 32 first locks. This is the reason the first way (lock read/write) approach is used to be able to cover all 256 locks in future devices. The driver also reports the amount of supported locks via debugfs. Reviewed-by: Samuel Holland <[email protected]> Acked-by: Maxime Ripard <[email protected]> Signed-off-by: Wilken Gottwalt <[email protected]> Link: https://lore.kernel.org/r/bfd2b97307c2321b15c09683f4bd5e1fcc792f13.1615713499.git.wilken.gottwalt@posteo.net Signed-off-by: Bjorn Andersson <[email protected]>
2021-03-17hwspinlock: remove sirf driverArnd Bergmann1-11/+0
The CSR SiRF prima2/atlas platforms are getting removed, so this driver is no longer needed. Cc: Barry Song <[email protected]> Link: https://lore.kernel.org/linux-arm-kernel/[email protected]/T/ Signed-off-by: Arnd Bergmann <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Bjorn Andersson <[email protected]>
2020-06-21hwspinlock: Simplify KconfigEzequiel Garcia1-6/+4
Every hwspinlock driver is expected to depend on the hwspinlock core, so it's possible to simplify the Kconfig, factoring out the HWSPINLOCK dependency. Reviewed-by: Baolin Wang <[email protected]> Signed-off-by: Ezequiel Garcia <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Bjorn Andersson <[email protected]>
2020-03-25hwspinlock: Allow drivers to be built with COMPILE_TESTBaolin Wang1-6/+6
Allow drivers to be built with COMPILE_TEST. Signed-off-by: Baolin Wang <[email protected]> Link: https://lore.kernel.org/r/5a95c3de07ef020a4e2f2776fa5adb00637ee387.1581324976.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson <[email protected]>
2019-06-29hwspinlock/omap: Add support for TI K3 SoCsSuman Anna1-1/+1
A HwSpinlock IP is also present on the newer TI K3 AM65x and J721E family of SoCs within the Main NavSS sub-module. Reuse the existing OMAP Hwspinlock driver to extend the support for this IP on K3 AM65x SoCs as well. The IP has slightly different bit-fields in the SYSCONFIG and SYSSTATUS registers. Signed-off-by: Suman Anna <[email protected]> Signed-off-by: Bjorn Andersson <[email protected]>
2018-12-05hwspinlock: add STM32 hwspinlock deviceBenjamin Gaignard1-0/+9
This patch adds support of hardware semaphores for stm32mp1 SoC. The hardware block provides 32 semaphores. Signed-off-by: Benjamin Gaignard <[email protected]> Signed-off-by: Benjamin Gaignard <[email protected]> Signed-off-by: Bjorn Andersson <[email protected]>
2018-05-24hwspinlock/core: Switch to SPDX license identifierSuman Anna1-0/+1
Use the appropriate SPDX license identifier in the Hwspinlock core driver source files and drop the previous boilerplate license text. Signed-off-by: Suman Anna <[email protected]> Signed-off-by: Bjorn Andersson <[email protected]>
2017-11-06hwspinlock: Change hwspinlock to a boolBaolin Wang1-1/+1
Change hwspinlock to a bool in case some drivers will meet dependency issue when hwspinlock is built as a module. Signed-off-by: Baolin Wang <[email protected]> Signed-off-by: Bjorn Andersson <[email protected]>
2017-05-17hwspinlock: sprd: Add hardware spinlock driverBaolin Wang1-0/+9
The Spreadtrum hardware spinlock device can provide hardware assistance for synchronization between the multiple subsystems. Signed-off-by: Baolin Wang <[email protected]> Signed-off-by: Bjorn Andersson <[email protected]>
2017-05-17Make HWSPINLOCK a menuconfig to ease disablingVincent Legoll1-11/+6
So that there's no need to get into the submenu to disable all related config entries. Signed-off-by: Vincent Legoll <[email protected]> Signed-off-by: Bjorn Andersson <[email protected]>
2015-06-12hwspinlock: add a CSR atlas7 driverWei Chen1-0/+12
Add hwspinlock support for the CSR atlas7 SoC. The Hardware Spinlock device on atlas7 provides hardware assistance for synchronization between the multiple processors in the system (dual Cortex-A7, CAN bus Cortex-M3 and audio DSP). Reviewed-by: Suman Anna <[email protected]> Reviewed-by: Bjorn Andersson <[email protected]> Signed-off-by: Wei Chen <[email protected]> Signed-off-by: Barry Song <[email protected]> Signed-off-by: Ohad Ben-Cohen <[email protected]>
2015-05-02hwspinlock: qcom: Add support for Qualcomm HW Mutex blockBjorn Andersson1-0/+12
Add driver for Qualcomm Hardware Mutex block found in many Qualcomm SoCs. Based on initial effort by Kumar Gala <[email protected]> Signed-off-by: Bjorn Andersson <[email protected]> Reviewed-by: Andy Gross <[email protected]> Reviewed-by: Jeffrey Hugo <[email protected]> Signed-off-by: Ohad Ben-Cohen <[email protected]>
2014-07-29hwspinlock: enable OMAP build for AM33xx, AM43xx & DRA7xxSuman Anna1-1/+1
HwSpinlocks are supported on TI's AM33xx, AM43xx and DRA7xx SoC device families as well. The IPs are identical to that of OMAP4/OMAP5, except for the number of locks. Add a depends on to the above family of SoCs to enable the build support for OMAP hwspinlock driver for any of the above SoC configs. Signed-off-by: Suman Anna <[email protected]> [small commit log changes] Signed-off-by: Ohad Ben-Cohen <[email protected]>
2013-04-05hwspinlock/omap: support OMAP5 as wellVincent Stehlé1-1/+1
OMAP5 has spinlocks, too. Signed-off-by: Vincent Stehlé <[email protected]> Cc: Tony Lindgren <[email protected]> Signed-off-by: Ohad Ben-Cohen <[email protected]>
2011-09-21hwspinlock/u8500: add hwspinlock driverMathieu J. Poirier1-0/+11
Add hwspinlock driver for U8500's Hsem hardware. At this point only HSem's protocol 1 is used (i.e. no interrupts). Signed-off-by: Mathieu Poirier <[email protected]> Acked-by: Linus Walleij <[email protected]> [[email protected]: adopt recent hwspin_lock_{un}register API changes] [[email protected]: set the owner member of the driver] [[email protected]: mark ->remove() function as __devexit] [[email protected]: write commit log] [[email protected]: small cleanups] Signed-off-by: Ohad Ben-Cohen <[email protected]>
2011-09-21hwspinlock/core: simplify KconfigOhad Ben-Cohen1-9/+7
Simplify hwspinlock's Kconfig by making the global CONFIG_HWSPINLOCK entry invisible; users will just select it when needed. This also prepares the ground for adding hwspinlock support for other platforms (the 'depends on ARCH_OMAP4' was rather hideous, and while we're at it, a dedicated menu is added). Signed-off-by: Ohad Ben-Cohen <[email protected]>
2011-03-18hwspinlock: depend on OMAP4Ohad Ben-Cohen1-0/+1
Currently only OMAP4 supports hwspinlocks, so don't bother asking anyone else. Signed-off-by: Ohad Ben-Cohen <[email protected]> Signed-off-by: Tony Lindgren <[email protected]>
2011-02-17drivers: hwspinlock: add OMAP implementationSimon Que1-0/+9
Add hwspinlock support for the OMAP4 Hardware Spinlock device. The Hardware Spinlock device on OMAP4 provides hardware assistance for synchronization between the multiple processors in the system (dual Cortex-A9, dual Cortex-M3 and a C64x+ DSP). [[email protected]: adapt to hwspinlock framework, tidy up] Signed-off-by: Simon Que <[email protected]> Signed-off-by: Hari Kanigeri <[email protected]> Signed-off-by: Krishnamoorthy, Balaji T <[email protected]> Signed-off-by: Ohad Ben-Cohen <[email protected]> Cc: Benoit Cousson <[email protected]> Cc: Kevin Hilman <[email protected]> Cc: Grant Likely <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Paul Walmsley <[email protected]> Cc: Russell King <[email protected]> Signed-off-by: Tony Lindgren <[email protected]>
2011-02-17drivers: hwspinlock: add frameworkOhad Ben-Cohen1-0/+13
Add a platform-independent hwspinlock framework. Hardware spinlock devices are needed, e.g., in order to access data that is shared between remote processors, that otherwise have no alternative mechanism to accomplish synchronization and mutual exclusion operations. Signed-off-by: Ohad Ben-Cohen <[email protected]> Cc: Hari Kanigeri <[email protected]> Cc: Benoit Cousson <[email protected]> Cc: Kevin Hilman <[email protected]> Cc: Grant Likely <[email protected]> Cc: Paul Walmsley <[email protected]> Cc: Russell King <[email protected]> Acked-by: Arnd Bergmann <[email protected]> Signed-off-by: Tony Lindgren <[email protected]>
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