linux-kernel - Re: [PATCH v20 00/17] acpi, clocksource: add GTDT driver and GTDT support in arm_arch

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Date:   Thu, 19 Jan 2017 17:20:07 +0800
From:   Hanjun Guo <hanjun.guo@...aro.org>
To:     fu.wei@...aro.org, rjw@...ysocki.net, lenb@...nel.org,
        daniel.lezcano@...aro.org, tglx@...utronix.de,
        marc.zyngier@....com, mark.rutland@....com,
        lorenzo.pieralisi@....com, sudeep.holla@....com
Cc:     linux-arm-kernel@...ts.infradead.org, linaro-acpi@...ts.linaro.org,
        linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        rruigrok@...eaurora.org, harba@...eaurora.org, cov@...eaurora.org,
        timur@...eaurora.org, graeme.gregory@...aro.org,
        al.stone@...aro.org, jcm@...hat.com, wei@...hat.com, arnd@...db.de,
        catalin.marinas@....com, will.deacon@....com,
        Suravee.Suthikulpanit@....com, leo.duran@....com, wim@...ana.be,
        linux@...ck-us.net, linux-watchdog@...r.kernel.org,
        tn@...ihalf.com, christoffer.dall@...aro.org, julien.grall@....com
Subject: Re: [PATCH v20 00/17] acpi, clocksource: add GTDT driver and GTDT
 support in arm_arch_timer

Hi Fuwei,

On 2017/1/18 21:25, fu.wei@...aro.org wrote:
> From: Fu Wei <fu.wei@...aro.org>
>
> This patchset:
>     (1)Preparation for adding GTDT support in arm_arch_timer:
>         1. Clean up printk() usage
>         2. Rename the type macros
>         3. Rename the PPI enum & enum values
>         4. Move the type macro and PPI enum into the header file
>         5. Add new enum for SPIs
>         6. Rework PPI determination;
>         7. Rework counter frequency detection;
>         8. Refactor arch_timer_needs_probing, move it into DT init call
>         9. Introduce some new structs and refactor the MMIO timer init code
>         for reusing some common 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.
>
> This patchset has been tested on the following platforms with ACPI enabled:
>     (1)ARM Foundation v8 model
>
> Changelog:
> v20: https://lkml.org/lkml/2017/1/18/
>      Reorder the first 4 patches and split the 4th patches.
>      Leave CNTHCTL_* as they originally were.
>      Fix the bug in arch_timer_select_ppi.
>      Split "Rework counter frequency detection" patch.
>      Rework the arch_timer_detect_rate function.
>      Improve the commit message of "Refactor MMIO timer probing".
>      Rebase to 4.10.0-rc4

Other than some minor comments I raised, the patch set
looks fine to me, and I tested this patch set on D03,
the percpu arch timer works fine as before.

With the comments fixed,
Reviewed-by: Hanjun Guo <hanjun.gu@...aro.org>
Tested-by: Hanjun Guo <hanjun.gu@...aro.org>

Thanks
Hanjun