linux-kernel - [PATCH 1/2] i2c: designware: switch to suspend_late/resume

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Message-Id: <20170920223152.100641-1-rajatja@google.com>
Date:   Wed, 20 Sep 2017 15:31:51 -0700
From:   Rajat Jain <rajatja@...gle.com>
To:     Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Wolfram Sang <wsa@...-dreams.de>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org, Lee Jones <lee.jones@...aro.org>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>, linux-pm@...r.kernel.org,
        Len Brown <len.brown@...el.com>, furquan@...gle.com,
        rajatxjain@...il.com
Cc:     Rajat Jain <rajatja@...gle.com>
Subject: [PATCH 1/2] i2c: designware: switch to suspend_late/resume_early

Ref: https://lkml.org/lkml/2017/9/19/649

The bus controllers should suspend the bus operations only after
all of the devices on the bus have suspended their device
completely. Since the i2c_client drivers could be talking to
their devices in their suspend_late() calls, lets ensure that the
bus is alive by that time. Thus moving the controller suspend logic to
suspend_late().

Signed-off-by: Rajat Jain <rajatja@...gle.com>
---
 drivers/i2c/busses/i2c-designware-platdrv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 0e65b97842b4..66dd7f844c40 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -468,7 +468,7 @@ static int dw_i2c_plat_suspend(struct device *dev)
 static const struct dev_pm_ops dw_i2c_dev_pm_ops = {
 	.prepare = dw_i2c_plat_prepare,
 	.complete = dw_i2c_plat_complete,
-	SET_SYSTEM_SLEEP_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume)
+	SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume)
 	SET_RUNTIME_PM_OPS(dw_i2c_plat_runtime_suspend,
 			   dw_i2c_plat_resume,
 			   NULL)
-- 
2.14.1.821.g8fa685d3b7-goog