linux-kernel - Re: [Patch 1/2] cpufreq: tegra194: get consistent cpuinfo_cur

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Message-ID: <20200924085635.GA2483160@ulmo>
Date:   Thu, 24 Sep 2020 10:56:35 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Sumit Gupta <sumitg@...dia.com>
Cc:     viresh.kumar@...aro.org, rjw@...ysocki.net, jonathanh@...dia.com,
        linux-pm@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        ksitaraman@...dia.com, bbasu@...dia.com
Subject: Re: [Patch 1/2] cpufreq: tegra194: get consistent cpuinfo_cur_freq

On Wed, Sep 16, 2020 at 10:41:16PM +0530, Sumit Gupta wrote:
> Frequency returned by 'cpuinfo_cur_freq' using counters is not fixed
> and keeps changing slightly. This change returns a consistent value
> from freq_table. If the reconstructed frequency has acceptable delta
> from the last written value, then return the frequency corresponding
> to the last written ndiv value from freq_table. Otherwise, print a
> warning and return the reconstructed freq.
> 
> Signed-off-by: Sumit Gupta <sumitg@...dia.com>
> ---
>  drivers/cpufreq/tegra194-cpufreq.c | 66 ++++++++++++++++++++++++++++++++------
>  1 file changed, 57 insertions(+), 9 deletions(-)

Acked-by: Thierry Reding <treding@...dia.com>

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