From patchwork Mon Jan 15 16:14:44 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Richard X-Patchwork-Id: 13519818 Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [217.70.183.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DDE4A17C95; Mon, 15 Jan 2024 16:16:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="Crp6RWxA" Received: by mail.gandi.net (Postfix) with ESMTPSA id 77D41C000B; Mon, 15 Jan 2024 16:16:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1705335378; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=luuiYzsnns/OhtWeHFFRwSXyejuX6Zby2kvPJdFacfc=; b=Crp6RWxAJP1bUpPZkHVslhQDy0LElcVFI6AwLcwULZs5RsYzIudWQYt8Q3iRhDgSSnaVZK 7ymwpYUXf0wGkO5wq+5zCpEykusRLnHd/2731m5szrEcC5N5vLQ/lkof9wfprFL2GDVlYU afNaDKsSr4+VALNWEMFWoWM0E5iBdmI/TqzLmaSDb8LhG0uu0N1htYIBEBKEjvqeHJsd6I PLElpPuwjvTy40jIgKBGS+dcAtKQwxZDjDs4wNOTVGcTD54SeSVUhAphBiFx+ccLAAaDHM 9Zw+x3r/aYZpT99MMMs2BmRWWIFYXclINT6abTZtRXkI30meD4hNw7NHLai+Rw== From: Thomas Richard Date: Mon, 15 Jan 2024 17:14:44 +0100 Subject: [PATCH 03/14] i2c: omap: wakeup the controller during suspend callback Precedence: bulk X-Mailing-List: linux-omap@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240102-j7200-pcie-s2r-v1-3-84e55da52400@bootlin.com> References: <20240102-j7200-pcie-s2r-v1-0-84e55da52400@bootlin.com> In-Reply-To: <20240102-j7200-pcie-s2r-v1-0-84e55da52400@bootlin.com> To: Linus Walleij , Bartosz Golaszewski , Andy Shevchenko , Tony Lindgren , Haojian Zhuang , Vignesh R , Aaro Koskinen , Janusz Krzysztofik , Andi Shyti , Peter Rosin , Vinod Koul , Kishon Vijay Abraham I , Philipp Zabel , Tom Joseph , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , Rob Herring , Bjorn Helgaas Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, linux-i2c@vger.kernel.org, linux-phy@lists.infradead.org, linux-pci@vger.kernel.org, gregory.clement@bootlin.com, theo.lebrun@bootlin.com, thomas.petazzoni@bootlin.com, u-kumar1@ti.com, Thomas Richard X-Mailer: b4 0.12.0 X-GND-Sasl: thomas.richard@bootlin.com A device may need the controller up during suspend_noirq or resume_noirq. But if the controller is autosuspended, there is no way to wakeup it during suspend_noirq or resume_noirq because runtime pm is disabled at this time. The suspend callback wakes up the controller, so it is available until its suspend_noirq callback (pm_runtime_force_suspend). During the resume, it's restored by resume_noirq callback (pm_runtime_force_resume). Then resume callback enables autosuspend. So the controller is up during a little time slot in suspend and resume sequences even if it's not used. Signed-off-by: Thomas Richard --- drivers/i2c/busses/i2c-omap.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index 42165ef57946..57f0738fa748 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -1575,9 +1575,24 @@ static int __maybe_unused omap_i2c_runtime_resume(struct device *dev) return 0; } + +static int omap_i2c_suspend(struct device *dev) +{ + return pm_runtime_resume_and_get(dev); +} + +static int omap_i2c_resume(struct device *dev) +{ + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + return 0; +} + static const struct dev_pm_ops omap_i2c_pm_ops = { SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) + SET_SYSTEM_SLEEP_PM_OPS(omap_i2c_suspend, omap_i2c_resume) SET_RUNTIME_PM_OPS(omap_i2c_runtime_suspend, omap_i2c_runtime_resume, NULL) };