[PATCH v7 0/3] Adding brcmstb-hwspinlock support

[Kamal Dasu]

This series adds hardware semaphore support for Broadcom set-top SoCs
via the generic hwspinlock framework.

The semaphore registers live in the sundry block; the DT binding
describes only the semaphore register range. The compatible is
brcm,bcm7038-sun-top-ctrl-semaphore (BCM7038 is where this block first
appeared on set-top chips).

The driver has been tested built-in and as a module.

v7 changes :
 - Rebase: Whole series rebased onto Linux 7.1-rc1 (254f49634ee1) so it
   applies cleanly on current upstream.
 - Reviewed-by tag (PATCH 1/3, dt-bindings): Krzysztof Kozlowski's

v6 changes:
Addressed review comments from Krzysztof Kozlowski:
 - Renamed DT binding YAML file from "brcm,brcmstb-hwspinlock.yaml"
   to "brcm,bcm7038-sun-top-ctrl-semaphore.yaml" to match the
   compatible string
 - Updated $id in the YAML to match the new filename
 - Updated MAINTAINERS F: entry to match the new filename

v5 changes:
Addressed review comments from Krzysztof Kozlowski:
 - Changed compatible to "brcm,bcm7038-sun-top-ctrl-semaphore"
   using the SoC where the semaphore hardware was first introduced,
   following the brcm,bcm7038-l1-intc convention

v4 changes:
Addressed review comments from Krzysztof Kozlowski and Rob Herring:
 - Renamed compatible from "brcm,brcmstb-hwspinlock" to
   "brcm,brcmstb-sun-top-ctrl-semaphore" to use the hardware name
 - Added description block to the DT binding YAML explaining what
   the semaphore registers are and their relationship to the sundry
   block
 - Fixed typo in Kconfig "Setttop" -> "Settop"
 - Fixed email typo in MODULE_AUTHOR

v3 changes:
Added detailed explanation in the all commit messages as per review
comments
 - Added description of 'sundry' ip block that the hardware semaphore
   belongs to
 - Added reasoning for using common compatible string

v2 changes:
Addressed following review comments:
 - fixed ordering of obj brcmstb_hwspinlock.o in Makefile
 - fixed ordering of 'config HWSPINLOCK_BRCMSTB' block in Kconfig
 - Renamed BRCMSTB_MAX_SEMAPHORES to BRCMSTB_NUM_SEMAPHORES
 - Removed unnecessary platform_set_drvdata(pdev, bank);

Also addressing duplicate PATCH 1/3 sent in error as part of v1 change.

v1 changes:
based on fixes made to Initial patch:
Link: https://github.com/intel-lab-lkp/linux/commits/Kamal-Dasu/dt-bindings-brcmstb-hwspinlock-support-for-hwspinlock/20250712-034624
Link: https://lore.kernel.org/r/20250711154221.928164-4-kamal.dasu%40broadcom.com
  [PATCH 2/4] hwspinlock: brcmstb hardware semaphore support

All the review comments and build warning have been fixed.

Kamal Dasu (3):
  dt-bindings: hwlock: Adding brcmstb-hwspinlock support
  hwspinlock: brcmstb hardware semaphore support
  MAINTAINERS: adding entry for BRCMSTB HWSPINLOCK driver

 .../brcm,bcm7038-sun-top-ctrl-semaphore.yaml  | 44 +++++++++
 MAINTAINERS                                   |  8 ++
 drivers/hwspinlock/Kconfig                    | 10 ++
 drivers/hwspinlock/Makefile                   |  1 +
 drivers/hwspinlock/brcmstb_hwspinlock.c       | 96 +++++++++++++++++++
 5 files changed, 159 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwlock/brcm,bcm7038-sun-top-ctrl-semaphore.yaml
 create mode 100644 drivers/hwspinlock/brcmstb_hwspinlock.c

-- 
2.34.1