linux-kernel - Re: [PATCH v1 07/11] cpufreq: tegra20: Check if this is Tegra20 machine

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Message-ID: <20180518015937.kcu3ltv3kb3nvoli@vireshk-i7>
Date:   Fri, 18 May 2018 07:29:37 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Peter Geis <pgwipeout@...il.com>
Subject: Re: [PATCH v1 07/11] cpufreq: tegra20: Check if this is Tegra20
 machine

On 17-05-18, 21:00, Dmitry Osipenko wrote:
> Don't even try to request the clocks during of module initialization on
> non-Tegra20 machines (this is the case for a multi-platform kernel) for
> consistency.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/cpufreq/tegra20-cpufreq.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/cpufreq/tegra20-cpufreq.c b/drivers/cpufreq/tegra20-cpufreq.c
> index 147ae3e14f18..797c61c74b65 100644
> --- a/drivers/cpufreq/tegra20-cpufreq.c
> +++ b/drivers/cpufreq/tegra20-cpufreq.c
> @@ -19,6 +19,7 @@
>  #include <linux/clk.h>
>  #include <linux/cpufreq.h>
>  #include <linux/module.h>
> +#include <linux/of.h>
>  
>  static struct cpufreq_frequency_table freq_table[] = {
>  	{ .frequency = 216000 },
> @@ -155,6 +156,9 @@ static int __init tegra_cpufreq_init(void)
>  {
>  	int err;
>  
> +	if (!of_machine_is_compatible("nvidia,tegra20"))
> +		return -ENODEV;
> +
>  	cpu_clk = clk_get_sys(NULL, "cclk");
>  	if (IS_ERR(cpu_clk))
>  		return PTR_ERR(cpu_clk);

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

-- 
viresh