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From: Dmitry Osipenko <digetx@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Alessandro Zummo <a.zummo@towertech.it>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>,
	linux-tegra@vger.kernel.org, linux-rtc@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] clocksource: tegra: Use rating when registering clock source
Date: Fri, 14 Jun 2019 15:24:07 +0300
Message-ID: <8ff5d2da-907e-611c-ec82-bbe50197c2f4@gmail.com> (raw)
In-Reply-To: <20190614104747.19712-1-thierry.reding@gmail.com>

14.06.2019 13:47, Thierry Reding пишет:
> From: Thierry Reding <treding@nvidia.com>
> 
> The rating is parameterized depending on SoC generation to make sure it
> takes precedence on implementations where the architected timer can't be
> used. This rating is already used for the clock event device. Use the
> same rating for the clock source to be consistent.
> 
> Signed-off-by: Thierry Reding <treding@nvidia.com>
> ---
>  drivers/clocksource/timer-tegra.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/clocksource/timer-tegra.c b/drivers/clocksource/timer-tegra.c
> index f6a8eb0d7322..e6608141cccb 100644
> --- a/drivers/clocksource/timer-tegra.c
> +++ b/drivers/clocksource/timer-tegra.c
> @@ -318,7 +318,7 @@ static int __init tegra_init_timer(struct device_node *np, bool tegra20,
>  	sched_clock_register(tegra_read_sched_clock, 32, TIMER_1MHz);
>  
>  	ret = clocksource_mmio_init(timer_reg_base + TIMERUS_CNTR_1US,
> -				    "timer_us", TIMER_1MHz, 300, 32,
> +				    "timer_us", TIMER_1MHz, rating, 32,
>  				    clocksource_mmio_readl_up);
>  	if (ret)
>  		pr_err("failed to register clocksource: %d\n", ret);
> 

Looks good. Although, could you please clarify whether arch-timer stops on T210 when CPU
enters deepest (powerdown) idle state? I'm starting to lose track a bit already. Because
if arch-timer stops in the deepest idle state, then it's a bit odd that Joseph didn't add
the clocksource for T210 in the first place and v5.1 probably shouldn't work well because
of that already.

  parent reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-14 10:47 Thierry Reding
2019-06-14 10:47 ` [PATCH 2/2] rtc: tegra: Implement suspend " Thierry Reding
2019-06-14 12:01   ` Dmitry Osipenko
2019-06-14 13:41     ` Thierry Reding
2019-06-14 13:49       ` Dmitry Osipenko
2019-06-14 14:14         ` Thierry Reding
2019-06-14 16:41           ` Dmitry Osipenko
2019-06-17 10:20             ` Thierry Reding
2019-06-17 13:29               ` Dmitry Osipenko
2019-06-14 12:35   ` Dmitry Osipenko
2019-06-14 13:42     ` Thierry Reding
2019-06-14 12:24 ` Dmitry Osipenko [this message]
2019-06-14 13:22   ` [PATCH 1/2] clocksource: tegra: Use rating when registering " Thierry Reding
2019-06-14 13:29     ` Dmitry Osipenko
2019-06-14 13:53       ` Thierry Reding
2019-06-14 14:02         ` Dmitry Osipenko
2019-06-14 14:06           ` Dmitry Osipenko
2019-06-14 15:37             ` Thierry Reding
2019-06-14 17:00               ` Dmitry Osipenko
2019-06-17 10:52                 ` Thierry Reding
2019-06-14 14:55           ` Thierry Reding

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