linux-kernel - Re: [PATCH v7 14/19] PM / devfreq: tegra30: Don't enable already enabled consecutive interrupts

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Date:   Fri, 1 Nov 2019 16:00:59 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Peter Geis <pgwipeout@...il.com>
Cc:     linux-pm@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 14/19] PM / devfreq: tegra30: Don't enable already
 enabled consecutive interrupts

On 19. 10. 30. 오전 7:00, Dmitry Osipenko wrote:
> Consecutive up/down interrupt-bit is set in the interrupt status register
> only if that interrupt was previously enabled. Thus enabling the already
> enabled interrupt doesn't do much for us.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/devfreq/tegra30-devfreq.c | 4 ----
>  1 file changed, 4 deletions(-)
> 
> diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
> index 9cbee82880ff..a9336cf4b37a 100644
> --- a/drivers/devfreq/tegra30-devfreq.c
> +++ b/drivers/devfreq/tegra30-devfreq.c
> @@ -261,8 +261,6 @@ static void actmon_isr_device(struct tegra_devfreq *tegra,
>  
>  		if (dev->boost_freq >= tegra->max_freq)
>  			dev->boost_freq = tegra->max_freq;
> -		else
> -			dev_ctrl |= ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;
>  	} else if (intr_status & ACTMON_DEV_INTR_CONSECUTIVE_LOWER) {
>  		/*
>  		 * new_boost = old_boost * down_coef
> @@ -275,8 +273,6 @@ static void actmon_isr_device(struct tegra_devfreq *tegra,
>  
>  		if (dev->boost_freq < (ACTMON_BOOST_FREQ_STEP >> 1))
>  			dev->boost_freq = 0;
> -		else
> -			dev_ctrl |= ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
>  	}
>  
>  	if (dev->config->avg_dependency_threshold) {
> 

Reviewed-by: Chanwoo Choi <cw00.choi@...sung.com>

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics