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From: Joel Stanley <joel@jms.id.au>
To: "Cédric Le Goater" <clg@kaod.org>
Cc: Guenter Roeck <linux@roeck-us.net>,
	Linus Walleij <linus.walleij@linaro.org>,
	Andrew Jeffery <andrew@aj.id.au>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/2] clocksource/drivers/fttmr010: Be stricter on IRQs
Date: Wed, 1 Sep 2021 23:38:19 +0000	[thread overview]
Message-ID: <CACPK8Xfu7K0FosjnfaiETXVP+QX9fOtUE5PymegvHc3MaWy52A@mail.gmail.com> (raw)
In-Reply-To: <567a65a8-077b-7394-c8e2-dbd9f063e02c@kaod.org>

On Sat, 28 Aug 2021 at 08:08, Cédric Le Goater <clg@kaod.org> wrote:

> AFAICT, the ast2600 does not use a fttmr010 clocksource.

Correct.

When doing bringup of the ast2600, I updated this driver to support
the new layout. Only once I'd submitted it did I learn that aspeed
preferred to use only the Cortex A7's timer source, and only that
source.

The armv7 timer can be lost when a core goes into power save mode, but
I am told the ast2600 does not implement power saving modes, so we set
the always-on property for the arm,armv7-timer. This allows us to use
the timer as a clocksource for hrtimers, removing the need to use the
fttmr010 driver at all.

Cheers,

Joel

  parent reply	other threads:[~2021-09-01 23:38 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-24 22:44 [PATCH 1/2] clocksource/drivers/fttmr010: Pass around less pointers Linus Walleij
2021-07-24 22:44 ` [PATCH 2/2] clocksource/drivers/fttmr010: Be stricter on IRQs Linus Walleij
2021-08-20  8:53   ` Daniel Lezcano
2021-08-20 13:39     ` Linus Walleij
2021-08-20 14:16       ` Daniel Lezcano
2021-08-21  4:20   ` Guenter Roeck
2021-08-21  8:04     ` Daniel Lezcano
2021-08-27 22:01     ` Linus Walleij
2021-08-27 22:31       ` Guenter Roeck
2021-08-28  3:37       ` Guenter Roeck
2021-08-28  8:08         ` Cédric Le Goater
2021-08-30  4:16           ` Andrew Jeffery
2021-08-30  4:58             ` [PATCH 2/2]: Be stric clocksource/drivers/fttmr010ter " Guenter Roeck
2021-08-30  6:30               ` Andrew Jeffery
2021-08-30  7:47               ` [PATCH 2/2]: Be stric clocksource/drivers/fttmr010 " Cédric Le Goater
2021-08-30 15:24                 ` Guenter Roeck
2021-09-01 23:38           ` Joel Stanley [this message]
2021-08-26 16:25 ` [tip: timers/core] clocksource/drivers/fttmr010: Pass around less pointers tip-bot2 for Linus Walleij

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