linux-kernel - [PATCH] i2c: at91: switched to resume/suspend callbacks.

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Message-ID: <1540203006-805-1-git-send-email-andrei.stefanescu@microchip.com>
Date:   Mon, 22 Oct 2018 10:17:47 +0000
From:   <Andrei.Stefanescu@...rochip.com>
To:     <wsa@...-dreams.de>, <Ludovic.Desroches@...rochip.com>,
        <Nicolas.Ferre@...rochip.com>, <alexandre.belloni@...tlin.com>
CC:     <Cristian.Birsan@...rochip.com>, <linux-i2c@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <Andrei.Stefanescu@...rochip.com>
Subject: [PATCH] i2c: at91: switched to resume/suspend callbacks.

In the previous version of the driver resume/suspend_noirq callbacks
were used. Because of this, when resuming from suspend-to-ram,
an I2C (belonging to a FLEXCOM) would resume before FLEXCOM.
The first read on the I2C bus would then result in a timeout.

This patch switches to resume/suspend callbacks which are 
called after FLEXCOM resumes. FLEXCOM, SPI and USART drivers use
resume/suspend callbacks.

Signed-off-by: Andrei Stefanescu <andrei.stefanescu@...rochip.com>
---
 drivers/i2c/busses/i2c-at91.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
index bfd1fdf..81f7b94 100644
--- a/drivers/i2c/busses/i2c-at91.c
+++ b/drivers/i2c/busses/i2c-at91.c
@@ -1174,7 +1174,7 @@ static int at91_twi_runtime_resume(struct device *dev)
 	return clk_prepare_enable(twi_dev->clk);
 }
 
-static int at91_twi_suspend_noirq(struct device *dev)
+static int at91_twi_suspend(struct device *dev)
 {
 	if (!pm_runtime_status_suspended(dev))
 		at91_twi_runtime_suspend(dev);
@@ -1182,7 +1182,7 @@ static int at91_twi_suspend_noirq(struct device *dev)
 	return 0;
 }
 
-static int at91_twi_resume_noirq(struct device *dev)
+static int at91_twi_resume(struct device *dev)
 {
 	struct at91_twi_dev *twi_dev = dev_get_drvdata(dev);
 	int ret;
@@ -1202,8 +1202,8 @@ static int at91_twi_resume_noirq(struct device *dev)
 }
 
 static const struct dev_pm_ops at91_twi_pm = {
-	.suspend_noirq	= at91_twi_suspend_noirq,
-	.resume_noirq	= at91_twi_resume_noirq,
+	.suspend	= at91_twi_suspend,
+	.resume		= at91_twi_resume,
 	.runtime_suspend	= at91_twi_runtime_suspend,
 	.runtime_resume		= at91_twi_runtime_resume,
 };
-- 
2.7.4