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Date: Fri, 4 Mar 2016 20:47:47 +0100 From: Wim Van Sebroeck <wim@...ana.be> To: fu.wei@...aro.org Cc: robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com, ijc+devicetree@...lion.org.uk, galak@...eaurora.org, linux@...ck-us.net, corbet@....net, catalin.marinas@....com, will.deacon@....com, Suravee.Suthikulpanit@....com, linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org, linux-doc@...r.kernel.org, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linaro-acpi@...ts.linaro.org, rruigrok@...eaurora.org, harba@...eaurora.org, cov@...eaurora.org, timur@...eaurora.org, dyoung@...hat.com, panand@...hat.com, graeme.gregory@...aro.org, al.stone@...aro.org, hanjun.guo@...aro.org, jcm@...hat.com, arnd@...db.de, leo.duran@....com, sudeep.holla@....com Subject: Re: [PATCH v14 0/4] Watchdog: introduce ARM SBSA watchdog driver Hi Fu, > From: Fu Wei <fu.wei@...aro.org> > > This patchset: > (1)Introduce Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt > for FDT info of SBSA Generic Watchdog, and give two examples of > adding SBSA Generic Watchdog device node into the dts files: > foundation-v8.dts and amd-seattle-soc.dtsi. > > (2)Introduce ARM SBSA watchdog driver: > a.Use linux kernel watchdog framework; > b.Work with FDT on ARM64; > c.Support getting timeout from parameter and FDT at the driver > init stage. > d.The driver works in two modes: > (1) single stage timeout (ignore WS0 interrupt) > (2) two stages timeout (register WS0 interrupt, do panic in routine) > e.User can config working mode by module parameter "action". > > This patchset has been tested with watchdog daemon > (ACPI/FDT, module/build-in) on the following platforms: > (1)ARM Foundation v8 model > (2)AMD Seattle platform > > This patchset has been tested with kdump successfully. > > Changelog: > v14:Fix a bug of registering interrupt routine: do a ping before > registering interrupt routine, in case where is a pending interrupt. > Reorder the initialization code to postpone registering interrupt routine. > Improve some code style: > (1)add some macro of string > (2)use watchdog_get_drvdata instead of to_sbsa_gwdt, > delete to_sbsa_gwdt. > > v13:https://lkml.org/lkml/2016/2/16/713 > Fix a dev_warn message typo"signle"-->"single" > Add MODULE_ALIAS > Add more *ed-by in commit message. > > v12:https://lkml.org/lkml/2016/2/16/154 > Fix a dev_warn message typo"fall"--"falling" > Remove unnecessary "status" in dts > Add more *ed-by in commit message. > > v11:https://lkml.org/lkml/2016/2/9/577 > Merge patch 4 and 5. > Improve some comments. > The driver works in two modes, it's configured by "action"(instead of > panic_enabled). > Improve the initialization of the timeout limits. > Feeding dog by writing "0" to WRR. > > v10:https://lkml.org/lkml/2016/2/3/817 > Delete pretimeout support. > Separate the driver to two parts: > (1) single stage timeout driver(ignore WS0 interrupt); > (2) register WS0 interrupt for the half timeout panic. > timeout == (enable --> WS1). > > v9: https://lkml.org/lkml/2015/11/9/57 > Rebase to latest kernel version(4.3). > Update the Documentation of sbsa-gwdt device node info of FDT: > (1) move some introduction to pretimeout patch > (2) delete WS1 value from "interrupts" of binding documentation, > since WS1 won't be handled by Linux. > > v8: https://lkml.org/lkml/2015/10/27/466 > Rebase to latest kernel version(4.3-rc7). > Separate the patches of GTDT support and arm_arch_timer. This > clocksource relevant patch will upstreamed in a individual patchset. > Update all the default timeout and pretimeout to 30s and 60s. > Improve documentation and inline comments. > Fix a bug in pretimeout support which makes timeout and pretimeout > parameters initialization fail. > > v7: https://lkml.org/lkml/2015/8/24/611 > Rebase to latest kernel version(4.2-rc7). > Improve FDT support: geting resource by order, instead of name. > According to the FDT support, Update the example dts file, gtdt.c > and sbsa_gwdt.c. > Pass the sparse test, and fix the warning. > Fix the max_pretimeout and max_timeout value overflow bug. > Delete the WCV output value. > > > v6: https://lkml.org/lkml/2015/6/23/359 > Improve the dtb example files: reduce the register frame size to 4K. > Improve pretimeout support: > (1) improve watchdog_init_timeouts function > (2) rename watchdog_check_min_max_timeouts back to the original name > (1) improve watchdog_timeout_invalid/watchdog_pretimeout_invalid > Add the new features in the sbsa_gwdt driver: > (1) In the second stage, user can feed the dog without cleaning WS0. > (2) In the second stage, user can trigger WS1 by setting pretimeout = 0. > (3) expand the max value of pretimeout, in case 10 second is not enough > for a kdump kernel reboot in panic. > > v5: https://lkml.org/lkml/2015/6/10/357 > Improve pretimeout support: > (1)fix typo in documentation and comments. > (2)fix the timeout limits validation bug. > Simplify sbsa_gwdt driver: > (1)integrate all the registers access functions into caller. > > v4: https://lkml.org/lkml/2015/6/2/4 > Refactor GTDT support code: remove it from arch/arm64/kernel/acpi.c, > put it into drivers/acpi/gtdt.c file. > Integrate the GTDT code of drivers/clocksource/arm_arch_timer.c into > drivers/acpi/gtdt.c. > Improve pretimeout support, fix "pretimeout == 0" problem. > Simplify sbsa_gwdt driver: > (1)timeout/pretimeout limits setup; > (2)keepalive function; > (3)delete "clk == 0" check; > (4)delete WS0 status bit check in interrupt routine; > (5)sbsa_gwdt_set_wcv function. > > v3: https://lkml.org/lkml/2015/5/25/111 > Delete "export arch_timer_get_rate" patch. > Driver back to use arch_timer_get_cntfrq. > Improve watchdog_init_timeouts function and update relevant documentation. > Improve watchdog_timeout_invalid and watchdog_pretimeout_invalid. > Improve foundation-v8.dts: delete the unnecessary tag of device node. > Remove "ARM64 || COMPILE_TEST" from Kconfig. > Add comments in arch/arm64/kernel/acpi.c > Fix typoes and incorrect comments. > > v2: https://lkml.org/lkml/2015/5/21/172 > Improve watchdog-kernel-api.txt documentation for pretimeout support. > Export "arch_timer_get_rate" in arm_arch_timer.c. > Add watchdog_init_timeouts API for pretimeout support in framework. > Improve suspend and resume foundation in driver > Improve timeout/pretimeout values init code in driver. > Delete unnecessary items of the sbsa_gwdt struct and #define. > Delete all unnecessary debug info in driver. > Fix 64bit division bug. > Use the arch_timer interface to get watchdog clock rate. > Add MODULE_DEVICE_TABLE for platform device id. > Fix typoes. > > v1: https://lkml.org/lkml/2015/5/15/279 > The first version upstream patchset to linux mailing list. > > Fu Wei (4): > Documentation: add sbsa-gwdt driver documentation > ARM64: add SBSA Generic Watchdog device node in foundation-v8.dts > ARM64: add SBSA Generic Watchdog device node in amd-seattle-soc.dtsi > Watchdog: introduce ARM SBSA watchdog driver > > .../devicetree/bindings/watchdog/sbsa-gwdt.txt | 31 ++ > Documentation/watchdog/watchdog-parameters.txt | 7 + > arch/arm64/boot/dts/amd/amd-seattle-soc.dtsi | 8 + > arch/arm64/boot/dts/arm/foundation-v8.dts | 7 + > drivers/watchdog/Kconfig | 20 + > drivers/watchdog/Makefile | 1 + > drivers/watchdog/sbsa_gwdt.c | 408 +++++++++++++++++++++ > 7 files changed, 482 insertions(+) > create mode 100644 Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt > create mode 100644 drivers/watchdog/sbsa_gwdt.c > > -- > 2.5.0 > Patchset added to linux-watchdog-next. Kind regards, Wim.
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