version 5: - rebased on top of master branch (patches 1 and 4)
version 4: - make timeout loop more robust
version 3: - use dev_get_parent - add Review-by
version 2: - use -ETIMEDOUT and -ENOSYS for errors cases - do not test if ops is valid - remove useless include - add a private structure to store base address - be more verbose in configuration flag description and commit message - log the error after hwspinlock_get_by_index()
This series add a news class to support hardware spinlock. Hardware spinlock could be used to protect critical sections of code between multi-processors.
The proposed API remain simple with only 3 functions to be called client: - hwspinlock_get_by_index: get a hardware spinlock by integer index from device-tree node - hwspinlock_lock_timeout: lock the hardware spinlock - hwspinlock_unlock: unlock the hardware spinlock
Driver API offert 4 operations: - of_xlate: translate a client's device-tree (OF) hardware specifier - lock: lock the hardware spinlock - unlock: unlock the hardware spinlock - relax: wait time between two calls to lock operations
Benjamin Gaignard (4): dm: Add Hardware Spinlock class clk: stm32: add hardware spinlock clock hwspinlock: add stm32 hardware spinlock support pinctrl: stm32: make pinctrl use hwspinlock
arch/arm/dts/stm32mp157c-ed1.dts | 8 ++ arch/arm/dts/stm32mp157c.dtsi | 9 ++ arch/sandbox/dts/test.dts | 4 + arch/sandbox/include/asm/state.h | 1 + configs/sandbox_defconfig | 2 + configs/stm32mp15_basic_defconfig | 2 + drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/clk/clk_stm32mp1.c | 3 + drivers/hwspinlock/Kconfig | 24 ++++++ drivers/hwspinlock/Makefile | 7 ++ drivers/hwspinlock/hwspinlock-uclass.c | 144 ++++++++++++++++++++++++++++++++ drivers/hwspinlock/sandbox_hwspinlock.c | 56 +++++++++++++ drivers/hwspinlock/stm32_hwspinlock.c | 92 ++++++++++++++++++++ drivers/pinctrl/pinctrl_stm32.c | 27 +++++- include/dm/uclass-id.h | 1 + include/hwspinlock.h | 140 +++++++++++++++++++++++++++++++ test/dm/Makefile | 1 + test/dm/hwspinlock.c | 40 +++++++++ 19 files changed, 560 insertions(+), 4 deletions(-) create mode 100644 drivers/hwspinlock/Kconfig create mode 100644 drivers/hwspinlock/Makefile create mode 100644 drivers/hwspinlock/hwspinlock-uclass.c create mode 100644 drivers/hwspinlock/sandbox_hwspinlock.c create mode 100644 drivers/hwspinlock/stm32_hwspinlock.c create mode 100644 include/hwspinlock.h create mode 100644 test/dm/hwspinlock.c