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From: Rajat Jain <rajatja@google.com>
To: Jarkko Nikula <jarkko.nikula@linux.intel.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Wolfram Sang <wsa@kernel.org>,
	linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-pm@vger.kernel.org, dtor@google.com
Cc: Rajat Jain <rajatja@google.com>,
	rajatxjain@gmail.com, dbasehore@chromium.org
Subject: [PATCH 2/3] i2c: enable async suspend/resume for i2c adapters
Date: Mon, 25 Oct 2021 14:35:30 -0700	[thread overview]
Message-ID: <20211025213532.2349161-3-rajatja@google.com> (raw)
In-Reply-To: <20211025213532.2349161-1-rajatja@google.com>

Enable async suspend/resume of i2c adapters. It enormously helps with
reducing the resume time of systems (as much as 20%-40%) where I2C devices
can take significant time (100s of ms) to resume.

Signed-off-by: Rajat Jain <rajatja@google.com>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
---
v2: Add Jarkko's tested by

 drivers/i2c/i2c-core-base.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 54964fbe3f03..8d4f2be54e17 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -1576,6 +1576,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
 	if (res)
 		goto out_reg;
 
+	device_enable_async_suspend(&adap->dev);
 	pm_runtime_no_callbacks(&adap->dev);
 	pm_suspend_ignore_children(&adap->dev, true);
 	pm_runtime_enable(&adap->dev);
-- 
2.33.0.1079.g6e70778dc9-goog


  parent reply	other threads:[~2021-10-25 21:35 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-25 21:35 [PATCH v2 0/3] i2c: Enable asynchronous suspend/resume Rajat Jain
2021-10-25 21:35 ` [PATCH v2 1/3] i2c: designware: Enable async suspend / resume of designware devices Rajat Jain
2021-11-29 16:51   ` Wolfram Sang
2021-10-25 21:35 ` Rajat Jain [this message]
2021-11-29 16:51   ` [PATCH 2/3] i2c: enable async suspend/resume for i2c adapters Wolfram Sang
2021-10-25 21:35 ` [PATCH 3/3] i2c: enable async suspend/resume on i2c client devices Rajat Jain
2021-11-29 16:51   ` Wolfram Sang
2021-11-29 16:48 ` [PATCH v2 0/3] i2c: Enable asynchronous suspend/resume Wolfram Sang
  -- strict thread matches above, loose matches on Subject: below --
2021-10-22  2:28 [PATCH 0/3] i2c: Enable async resume for i2c devices Rajat Jain
2021-10-22  2:28 ` [PATCH 2/3] i2c: enable async suspend/resume for i2c adapters Rajat Jain

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