linux-kernel - Re: [PATCH v5 07/11] cpufreq: dt-platdev: Blacklist NVIDIA Tegra20 and Tegra30 SoCs

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Date:   Mon, 16 Dec 2019 09:35:32 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Prashant Gaikwad <pgaikwad@...dia.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        linux-pm@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 07/11] cpufreq: dt-platdev: Blacklist NVIDIA Tegra20
 and Tegra30 SoCs

On 18-11-19, 19:45, Dmitry Osipenko wrote:
> Both NVIDIA Tegra20 and Tegra30 SoCs should be blacklisted because CPU
> OPPs use supported_hw and thus platdev isn't suitable for these SoCs.
> Currently cpufreq-dt driver produces a bit annoying warning splats
> during boot because valid OPPs are not found, this will be fixed once
> tegra20-cpufreq driver will be update to support cpufreq-dt. The warnings
> will also happen on older stable kernels using newer device-trees, thus
> this patch should be backported to stable kernels as well.
> 
> Cc: <stable@...r.kernel.org>
> Reported-by: Jon Hunter <jonathanh@...dia.com>
> Fixes: 4053aa65c517 ("ARM: tegra: cardhu-a04: Add CPU Operating Performance Points")
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/cpufreq/cpufreq-dt-platdev.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
> index f1d170dcf4d3..aba591d57c67 100644
> --- a/drivers/cpufreq/cpufreq-dt-platdev.c
> +++ b/drivers/cpufreq/cpufreq-dt-platdev.c
> @@ -121,6 +121,8 @@ static const struct of_device_id blacklist[] __initconst = {
>  	{ .compatible = "mediatek,mt8176", },
>  	{ .compatible = "mediatek,mt8183", },
>  
> +	{ .compatible = "nvidia,tegra20", },
> +	{ .compatible = "nvidia,tegra30", },
>  	{ .compatible = "nvidia,tegra124", },
>  	{ .compatible = "nvidia,tegra210", },

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

-- 
viresh