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hwspinlock updates for v4.21

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This adds support for the hardware semaphores found in STM32MP1.
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Merge tag 'hwlock-v4.21' of git://github.com/andersson/remoteproc

Pull hwspinlock updates from Bjorn Andersson:
 "This adds support for the hardware semaphores found in STM32MP1"

* tag 'hwlock-v4.21' of git://github.com/andersson/remoteproc:
  hwspinlock: fix return value check in stm32_hwspinlock_probe()
  hwspinlock: add STM32 hwspinlock device
  dt-bindings: hwlock: Document STM32 hwspinlock bindings
This commit is contained in:
Linus Torvalds 2019-01-06 11:37:44 -08:00
commit 66e012f618
4 changed files with 189 additions and 0 deletions
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23
Documentation/devicetree/bindings/hwlock/st,stm32-hwspinlock.txt Normal file
View file

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STM32 Hardware Spinlock Device Binding
-------------------------------------
Required properties :
- compatible : should be "st,stm32-hwspinlock".
- reg : the register address of hwspinlock.
- #hwlock-cells : hwlock users only use the hwlock id to represent a specific
hwlock, so the number of cells should be <1> here.
- clock-names : Must contain "hsem".
- clocks : Must contain a phandle entry for the clock in clock-names, see the
common clock bindings.
Please look at the generic hwlock binding for usage information for consumers,
"Documentation/devicetree/bindings/hwlock/hwlock.txt"
Example of hwlock provider:
hwspinlock@4c000000 {
compatible = "st,stm32-hwspinlock";
#hwlock-cells = <1>;
reg = <0x4c000000 0x400>;
clocks = <&rcc HSEM>;
clock-names = "hsem";
};