[PATCHv6 0/5] hwspinlock core/omap dt support

[Suman Anna]

Hi Ohad,

>
> This is an update to the hwspinlock dt support series. The series
> is rebased onto v3.17-rc3, and addresses the review comments on the
> previous v5 series. I have also split and left out the RFC patches
> about the support for reserved locks (will post these as a separate
> series) and return code convention changes in the hwspinlock core
> (will not be needed anymore). The support for deferred probing of
> clients is supported in the new of_hwspin_lock_get_id() function
> itself.
> 
> Following are the main changes in v6 w.r.t v5:
> - [Patch 1] Updated generic hwspinlock bindings after folding back
>   the hwlock-base-id property from v5 Patch 8 [1]. [Patch 1]
> - [Patch 4] Updated the common OF helpers patch based on review
>   comments on v5. of_hwspin_lock_request_specific() is replaced
>   with of_hwspin_lock_get_id(). of_hwspin_lock_simple_xlate() is
>   made internal, and of_hwspin_lock_get_base_id() is added.
> - [Patch 5] Updated the OMAP hwspinlock DT support patch to address
>   review comments about hard-coded base-id, it is parsed from DT
>   if present.
> - Patches 2 and 3 are unchanged from previous version.
> - Support patches for AM335x and AM437x SoCs (v5 patches 6 and 7)
>   have been dropped as they are merged in separately for 3.17
> - RFC patches (v5 patches 9 through 15) adding the concept of
>   reserved locks and return code change convention dropped.
> 
> I had looked into dropping the patch to maintain the list of registered
> spinlocks, but had to retain the patch as it was needed to perform the
> validity of the args-specifier value in of_hwspin_lock_get_id().

Ping, do you have any comments on this revised series? If not, can we
queue this for 3.18?

regards
Suman

> 
> The validation logs on all the applicable OMAP SoCs are at:
>   OMAP4  - http://pastebin.ubuntu.com/8329228
>   OMAP5  - http://pastebin.ubuntu.com/8329301
>   DRA74x - http://pastebin.ubuntu.com/8329261
>   AM33xx - http://pastebin.ubuntu.com/8329199
>   AM43xx - http://pastebin.ubuntu.com/8329273
> 
> The above logs are generated with some additional test patches staged
> here for reference:
> https://github.com/sumananna/omap-kernel/commits/hwspinlock/test/3.17-rc3-dt-v6
> https://github.com/sumananna/omap-kernel/commits/hwspinlock/submit/3.17-rc3-dt-v6
> 
> regards
> Suman
> 
> [1] https://patchwork.kernel.org/patch/4096741/
> 
> ---
> v5:
> http://marc.info/?l=linux-omap&m=139890478402807&w=2
> - Rebased v4 patches plus additional RFC patches.
> - Added back the patch to support DT-based hwlock-base-id property,
>   for registration purposes.
> - RFC patches introducing the concept of reserved locks.
> - Staged patches for converting return convention to better support
>   deferred probing of client drivers.
> 
> v4:
> - The DT bindings are split into separate patches, and updated to
>   add comments about #hwlock-cells
> - Fixed a registration issue with repeated module installation and
>   removal.
> - Added a new OF helper to support #hwlock-cells in addition to the
>   previous OF functions. The OMAP adaptation patch is updated to use
>   the default translate function
> - Updated hwspinlock documentation to adjust for the structure
>   changes and the new api additions.
> - Added build support for AM335x, AM43xx and DRA7xx
> http://marc.info/?l=linux-omap&m=138965904015225&w=2
> 
> v3:
> - Removed the DT property hwlock-base-id and associated OF helper
> - Added changes in core to support requesting a specific hwlock using
>   phandle + args approach
> - Revised both the common and OMAP DT bindings document
> http://marc.info/?l=linux-omap&m=138143992932197&w=2
> 
> v2:
> - Added a new common DT binding documentation and OF helpers.
> - Revised OMAP DT parse support to use the new OF helper (Patch2)
> - OMAP5 hwspinlock support including the hwmod entry and DT node
> - Add AM335x support to OMAP hwspinlock driver, including a fix
>   needed in driver given that AM335 spinlock module requires s/w wakeup
> - AM335 DT node for spinlock, and a hwmod change to enable smart-idle
>   for AM335.
> - OMAP4 DT node patch is unchanged
> http://marc.info/?l=linux-omap&m=137944644112727&w=2
> 
> v1:
> - Add DT parse support to OMAP hwspinlock driver
> - Add OMAP4 DT node and bindings information
> http://marc.info/?l=linux-omap&m=137823082308009&w=2
> 
> ---
> 
> Suman Anna (5):
>   Documentation: dt: add common bindings for hwspinlock
>   Documentation: dt: add the omap hwspinlock bindings document
>   hwspinlock/core: maintain a list of registered hwspinlock banks
>   hwspinlock/core: add common OF helpers
>   hwspinlock/omap: add support for dt nodes
> 
>  .../devicetree/bindings/hwlock/hwlock.txt          |  55 +++++++
>  .../devicetree/bindings/hwlock/omap-hwspinlock.txt |  24 +++
>  Documentation/hwspinlock.txt                       |  28 ++++
>  MAINTAINERS                                        |   1 -
>  arch/arm/mach-omap2/Makefile                       |   3 -
>  arch/arm/mach-omap2/hwspinlock.c                   |  60 -------
>  drivers/hwspinlock/hwspinlock_core.c               | 173 +++++++++++++++++++++
>  drivers/hwspinlock/hwspinlock_internal.h           |   2 +
>  drivers/hwspinlock/omap_hwspinlock.c               |  23 ++-
>  include/linux/hwspinlock.h                         |  15 +-
>  10 files changed, 312 insertions(+), 72 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/hwlock/hwlock.txt
>  create mode 100644 Documentation/devicetree/bindings/hwlock/omap-hwspinlock.txt
>  delete mode 100644 arch/arm/mach-omap2/hwspinlock.c
>