[PATCH v16 00/15] acpi, clocksource: add GTDT driver and GTDT support in arm_arch_timer

Thu Nov 17 01:25:14 PST 2016

Sorry for not describing specifically in the last mail.
I have applied all the patches of this patchset on Linux 4.9, and tested
the per-cpu timer and sbsa watchdog part, which function well on D05 board.

On 2016/11/17 11:34, Xiongfeng Wang wrote:
> Tested-by:  wangxiongfeng2 at huawei.com on D05 board.
> 
> 
> On 2016/11/16 21:48, fu.wei at linaro.org wrote:
>> From: Fu Wei <fu.wei at linaro.org>
>>
>> This patchset:
>>     (1)Preparation for adding GTDT support in arm_arch_timer:
>>         1. Move some enums and marcos to header file;
>>         2. Add a new enum for spi type;
>>         3. Improve printk relevant code.
>>         4. rename some  enums and defines, and some cleanups.
>>         5. separate out arch_timer_uses_ppi init code and fix a potential bug
>>         6. Refactor arch_timer_detect_rate to keep dt code only in *_of_init
>>         7. Refactor arch_timer_needs_probing, and call it only if acpi disabled.
>>         8. Introduce some new structs and refactor the timer init code
>>
>>     (2)Introduce ACPI GTDT parser: drivers/acpi/arm64/acpi_gtdt.c
>>     Parse all kinds of timer in GTDT table of ACPI:arch timer,
>>     memory-mapped timer and SBSA Generic Watchdog timer.
>>     This driver can help to simplify all the relevant timer drivers,
>>     and separate all the ACPI GTDT knowledge from them.
>>
>>     (3)Simplify ACPI code for arm_arch_timer
>>
>>     (4)Add GTDT support for ARM memory-mapped timer, also refactor
>>     original memory-mapped timer dt support for reusing some common
>>     code.
>>
>> This patchset has been tested on the following platforms with ACPI enabled:
>>     (1)ARM Foundation v8 model
>>
>> Changelog:
>> v16: https://lkml.org/lkml/2016/
>>      Fix patchset problem about static enum ppi_nr of 01/13 in v15.
>>      Refactor arch_timer_detect_rate.
>>      Refactor arch_timer_needs_probing.
>>
>> v15: https://lkml.org/lkml/2016/11/15/366
>>      Re-order patches
>>      Add arm_arch_timer refactoring patches to prepare for GTDT:
>>          1. rename some  enums and defines, and some cleanups
>>          2. separate out arch_timer_uses_ppi init code and fix a potential bug
>>          3. Improve some new structs, refactor the timer init code.
>>      Since the some structs have been changed, GTDT parser for memory-mapped
>>      timer and SBSA Generic Watchdog timer have been update.
>>
>> v14: https://lkml.org/lkml/2016/9/28/573
>>      Separate memory-mapped timer GTDT support into two patches
>>          1. Refactor the timer init code to prepare for GTDT
>>          2. Add GTDT support for memory-mapped timer
>>
>> v13: http://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1231717.html
>>      Improve arm_arch_timer code for memory-mapped
>>      timer GTDT support, refactor original memory-mapped timer
>>      dt support for reusing some common code.
>>
>> v12: https://lkml.org/lkml/2016/9/13/250
>>      Rebase to latest Linux 4.8-rc6
>>      Delete the confusing "skipping" in the error message.
>>
>> V11: https://lkml.org/lkml/2016/9/6/354
>>      Rebase to latest Linux 4.8-rc5
>>      Delete typedef (suggested by checkpatch.pl)
>>
>> V10: https://lkml.org/lkml/2016/7/26/215
>>      Drop the "readq" patch.
>>      Rebase to latest Linux 4.7.
>>
>> V9: https://lkml.org/lkml/2016/7/25/345
>>     Improve pr_err message in acpi gtdt driver.
>>     Update Commit message for 7/9
>>     shorten the irq mapping function name
>>     Improve GTDT driver for memory-mapped timer
>>
>> v8: https://lkml.org/lkml/2016/7/19/660
>>     Improve "pr_fmt(fmt)" definition: add "ACPI" in front of "GTDT",
>>     and also improve printk message.
>>     Simplify is_timer_block and is_watchdog.
>>     Merge acpi_gtdt_desc_init and gtdt_arch_timer_init into acpi_gtdt_init();
>>     Delete __init in include/linux/acpi.h for GTDT API
>>     Make ARM64 select GTDT.
>>     Delete "#include <linux/module.h>" from acpi_gtdt.c
>>     Simplify GT block parse code.
>>
>> v7: https://lkml.org/lkml/2016/7/13/769
>>     Move the GTDT driver to drivers/acpi/arm64
>>     Add add the ARM64-specific ACPI Support maintainers in MAINTAINERS
>>     Merge 3 patches of GTDT parser driver.
>>     Fix the for_each_platform_timer bug.
>>
>> v6: https://lkml.org/lkml/2016/6/29/580
>>     split the GTDT driver to 4 parts: basic, arch_timer, memory-mapped timer,
>>     and SBSA Generic Watchdog timer
>>     Improve driver by suggestions and example code from Daniel Lezcano
>>
>> v5: https://lkml.org/lkml/2016/5/24/356
>>     Sorting out all patches, simplify the API of GTDT driver:
>>     GTDT driver just fills the data struct for arm_arch_timer driver.
>>
>> v4: https://lists.linaro.org/pipermail/linaro-acpi/2016-March/006667.html
>>     Delete the kvm relevant patches
>>     Separate two patches for sorting out the code for arm_arch_timer.
>>     Improve irq info export code to allow missing irq info in GTDT table.
>>
>> v3: https://lkml.org/lkml/2016/2/1/658
>>     Improve GTDT driver code:
>>       (1)improve pr_* by defining pr_fmt(fmt)
>>       (2)simplify gtdt_sbsa_gwdt_init
>>       (3)improve gtdt_arch_timer_data_init, if table is NULL, it will try
>>       to get GTDT table.
>>     Move enum ppi_nr to arm_arch_timer.h, and add enum spi_nr.
>>     Add arm_arch_timer get ppi from DT and GTDT support for kvm.
>>
>> v2: https://lkml.org/lkml/2015/12/2/10
>>     Rebase to latest kernel version(4.4-rc3).
>>     Fix the bug about the config problem,
>>     use CONFIG_ACPI_GTDT instead of CONFIG_ACPI in arm_arch_timer.c
>>
>> v1: The first upstreaming version: https://lkml.org/lkml/2015/10/28/553
>>
>> Fu Wei (15):
>>   clocksource/drivers/arm_arch_timer: Move enums and defines to header
>>     file
>>   clocksource/drivers/arm_arch_timer: Add a new enum for spi type
>>   clocksource/drivers/arm_arch_timer: Improve printk relevant code
>>   clocksource/drivers/arm_arch_timer: rename some enums and defines, and
>>     some cleanups.
>>   clocksource/drivers/arm_arch_timer: fix a bug in arch_timer_register
>>     about arch_timer_uses_ppi
>>   clocksource/drivers/arm_arch_timer: separate out arch_timer_uses_ppi
>>     init code to prepare for GTDT.
>>   clocksource/drivers/arm_arch_timer: Refactor arch_timer_detect_rate to
>>     keep dt code in *_of_init
>>   clocksource/drivers/arm_arch_timer: Refactor arch_timer_needs_probing,
>>     and call it only if acpi disabled.
>>   clocksource/drivers/arm_arch_timer: Introduce some new structs to
>>     prepare for GTDT
>>   clocksource/drivers/arm_arch_timer: Refactor the timer init code to
>>     prepare for GTDT
>>   acpi/arm64: Add GTDT table parse driver
>>   clocksource/drivers/arm_arch_timer: Simplify ACPI support code.
>>   acpi/arm64: Add memory-mapped timer support in GTDT driver
>>   clocksource/drivers/arm_arch_timer: Add GTDT support for memory-mapped
>>     timer
>>   acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver
>>
>>  arch/arm64/Kconfig                   |   1 +
>>  drivers/acpi/arm64/Kconfig           |   3 +
>>  drivers/acpi/arm64/Makefile          |   1 +
>>  drivers/acpi/arm64/gtdt.c            | 411 +++++++++++++++++++++++++++++
>>  drivers/clocksource/arm_arch_timer.c | 484 ++++++++++++++++++++---------------
>>  drivers/watchdog/Kconfig             |   1 +
>>  include/clocksource/arm_arch_timer.h |  61 ++++-
>>  include/linux/acpi.h                 |   8 +
>>  virt/kvm/arm/hyp/timer-sr.c          |   6 +-
>>  9 files changed, 759 insertions(+), 217 deletions(-)
>>  create mode 100644 drivers/acpi/arm64/gtdt.c
>>
> 
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