Re: [PATCH v2 19/20] mips: cevt-r4k: Update the r4k-clockevent frequency in sync with CPU

[Thomas Bogendoerfer]

On Wed, May 06, 2020 at 08:42:37PM +0300, Sergey.Semin@xxxxxxxxxxxxxxxxxxxx wrote:
> diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c
> index 17a9cbb8b3df..f5b72fb7d5ee 100644
> --- a/arch/mips/kernel/cevt-r4k.c
> +++ b/arch/mips/kernel/cevt-r4k.c
> @@ -8,6 +8,7 @@
>   */
>  #include <linux/clockchips.h>
>  #include <linux/interrupt.h>
> +#include <linux/cpufreq.h>
>  #include <linux/percpu.h>
>  #include <linux/smp.h>
>  #include <linux/irq.h>
> @@ -250,6 +251,49 @@ unsigned int __weak get_c0_compare_int(void)
>  	return MIPS_CPU_IRQ_BASE + cp0_compare_irq;
>  }
>  
> +#ifdef CONFIG_CPU_FREQ
> +
> +static unsigned long mips_ref_freq;
> +
> +static int cpufreq_callback(struct notifier_block *nb,
> +			    unsigned long val, void *data)

please prefix function names with r4k_ to make them different from
the other ones you implemented in kernel/time.c. I know they are
static, but keeping different names makes looking at crashes easier.

> +	struct cpufreq_freqs *freq = data;
> +	struct clock_event_device *cd;
> +	unsigned long rate;
> +	int cpu;
> +
> +	if (!mips_ref_freq)
> +		mips_ref_freq = freq->old;

isn't this the same as mips_hpt_frequency ?

Thomas.

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