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Date:   Mon, 1 Feb 2021 23:07:14 +0100
From:   Wolfram Sang <wsa@kernel.org>
To:     Samuel Holland <samuel@sholland.org>
Cc:     Gregory CLEMENT <gregory.clement@bootlin.com>,
        linux-i2c@vger.kernel.org, Maxime Ripard <mripard@kernel.org>,
        Chen-Yu Tsai <wens@csie.org>,
        Jernej Skrabec <jernej.skrabec@siol.net>,
        Ondrej Jirman <megous@megous.com>,
        linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com
Subject: Re: [PATCH] i2c: mv64xxx: Add runtime PM support
Message-ID: <20210201220714.GF24315@kunai>
Mail-Followup-To: Wolfram Sang <wsa@kernel.org>,
        Samuel Holland <samuel@sholland.org>,
        Gregory CLEMENT <gregory.clement@bootlin.com>,
        linux-i2c@vger.kernel.org, Maxime Ripard <mripard@kernel.org>,
        Chen-Yu Tsai <wens@csie.org>,
        Jernej Skrabec <jernej.skrabec@siol.net>,
        Ondrej Jirman <megous@megous.com>, linux-kernel@vger.kernel.org,
        linux-sunxi@googlegroups.com
References: <20210103105146.33835-1-samuel@sholland.org>
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On Sun, Jan 03, 2021 at 04:51:46AM -0600, Samuel Holland wrote:
> To save power, gate the clock when the bus is inactive, during system
> sleep, and during shutdown. On some platforms, specifically Allwinner
> A13/A20, gating the clock implicitly resets the module as well. Since
> the module already needs to be reset after some suspend/resume cycles,
> it is simple enough to reset it during every runtime suspend/resume.
>=20
> Because the bus may be used by wakeup source IRQ threads, it needs to
> be functional as soon as IRQs are enabled. Thus, its system PM hooks
> need to run in the noirq phase.
>=20
> Signed-off-by: Samuel Holland <samuel@sholland.org>

Applied to for-next with Gregory's ack, thanks!


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