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Date: Wed, 30 Apr 2014 19:34:21 -0500 From: Suman Anna <s-anna@...com> To: Ohad Ben-Cohen <ohad@...ery.com>, Mark Rutland <mark.rutland@....com>, Kumar Gala <galak@...eaurora.org> CC: Tony Lindgren <tony@...mide.com>, Josh Cartwright <joshc@...eaurora.org>, Bjorn Andersson <bjorn@...o.se>, <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>, <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, Suman Anna <s-anna@...com> Subject: [PATCHv5 00/15] hwspinlock/omap dt support Hi Ohad, This is a refresh/update of the hwspinlock dt support series. The series is rebased onto v3.15-rc3, and adds 8 new patches (RFC) to handle various discussion points arised on v4. Following are the main changes in v5: - Base DT patches (Patches 1 to 7, except for 4) are identical to v4. Patch4 is updated to remove some traces and fix --strict checkpatch warnings. - Patch 8 brings back the DT-based hwlock-base-id property, for registration purposes. Based on v4 discussion [1]. - Patches 9 through 13 introduce the concept of reserved locks, again based on the discussion in v4 [1]. The approach taken here is simplistic, each hwlock is assigned a type attribute during registration, with the _request_ apis honoring the lock type attribute. - Staged patches 14 & 15 for converting return convention to better support deferred probing of client drivers. I do think that it is still a good idea to return ERR_PTRs (unconcluded discussion in v4 [2]). The main advantage is to support deferred probing for DT boots. The original argument/change for returning NULL pointers pre-dates both the deferred driver probe mechanism and DT-based boot, so it may be moot on the current kernel. I have marked the new patches as RFC, and should ideally be dealt with as a separate series. I have added these to this series as they also add couple of DT-based properties, as well as maintain the discussion context from the previous series. I am ok for the reserved lock patches to be left out for 3.16 merge window if these patches still need some work. I am hoping to have the first 7 or 8 patches (and finalized return code changes) to make it to 3.16. The validation logs on all the applicable OMAP SoCs are at: OMAP4 - http://slexy.org/view/s2MMyLZTiH OMAP5 - http://slexy.org/view/s20U2ElygK DRA74x - http://slexy.org/view/s20fAoWJ84 AM33xx - http://slexy.org/view/s2HLj2b406 AM43xx - http://slexy.org/view/s2JNrJSWLm The above logs are generated with some additional test patches staged here for reference (not for merging) https://github.com/sumananna/omap-kernel/commits/hwspinlock/3.15-rc3-v5 https://github.com/sumananna/omap-kernel/commits/hwspinlock/3.15-rc3-v5-test regards Suman [1] http://marc.info/?l=linux-omap&m=139510004009415&w=2 [2] http://marc.info/?l=linux-omap&m=139490475424338&w=2 --- 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 (15): 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 hwspinlock/omap: enable module before reading SYSSTATUS register hwspinlock/omap: enable build for AM33xx, AM43xx & DRA7xx hwspinlock/core: add support for base id in DT hwspinlock/core: prepare unregister code to support reserved locks hwspinlock/core: prepare core to support reserved locks hwspinlock/core: add support for reserved locks hwspinlock/core: add OF helper to parse reserved locks hwspinlock/omap: use OF helper to get reserved locks hwspinlock/core: return ERR_PTRs on failure in _request_ api hwspinlock/core: change return codes of_hwspin_lock_request_specific .../devicetree/bindings/hwlock/hwlock.txt | 61 +++++ .../devicetree/bindings/hwlock/omap-hwspinlock.txt | 24 ++ Documentation/hwspinlock.txt | 48 +++- MAINTAINERS | 1 - arch/arm/mach-omap2/Makefile | 3 - arch/arm/mach-omap2/hwspinlock.c | 60 ----- drivers/hwspinlock/Kconfig | 2 +- drivers/hwspinlock/hwspinlock_core.c | 286 ++++++++++++++++++--- drivers/hwspinlock/hwspinlock_internal.h | 11 + drivers/hwspinlock/omap_hwspinlock.c | 49 +++- drivers/hwspinlock/u8500_hsem.c | 3 +- include/linux/hwspinlock.h | 34 ++- 12 files changed, 458 insertions(+), 124 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 -- 1.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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