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Subject: Re: [PATCH v2 0/2] Work around for Hisilicon CPPC cpufreq
To:     Xiongfeng Wang <wangxiongfeng2@huawei.com>,
        <viresh.kumar@linaro.org>, <rafael@kernel.org>,
        <gcherianv@gmail.com>, <pprakash@codeaurora.org>,
        <george.cherian@cavium.com>, <robert.moore@intel.com>
References: <1550130368-60513-1-git-send-email-wangxiongfeng2@huawei.com>
CC:     <linux-acpi@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <guohanjun@huawei.com>
From:   John Garry <john.garry@huawei.com>
Message-ID: <2f397788-fcb0-a781-c497-9e698494f508@huawei.com>
Date:   Thu, 14 Feb 2019 11:39:22 +0000
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On 14/02/2019 07:46, Xiongfeng Wang wrote:
> Hisilicon chips do not support delivered performance counter register
> and reference performance counter register. But the platform can
> calculate the real performance using its own method. This patch provide
> a workaround for this problem, and other platforms can also use this
> workaround framework. We reuse the desired performance register to
> store the real performance calculated by the platform. After the
> platform finished the frequency adjust, it gets the real performance and
> writes it into desired performance register. OS can use it to calculate
> the real frequency.
>

It would be convenient for reviewers to detail what changed between 
versions in future.

John

> Xiongfeng Wang (2):
>   ACPI / CPPC: Add a helper to get desired performance
>   cpufreq / cppc: Work around for Hisilicon CPPC cpufreq
>
>  drivers/acpi/cppc_acpi.c       | 38 +++++++++++++++++++++++
>  drivers/cpufreq/cppc_cpufreq.c | 70 ++++++++++++++++++++++++++++++++++++++++++
>  include/acpi/cppc_acpi.h       |  1 +
>  3 files changed, 109 insertions(+)
>