mfd: atmel-flexcom: Use .resume_noirq

stable inclusion
from stable-v5.10.94
commit ad52b9890b83ffa7602a23949c2cb0c0d94681e9
bugzilla: https://gitee.com/openeuler/kernel/issues/I531X9

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ad52b9890b83ffa7602a23949c2cb0c0d94681e9

--------------------------------

[ Upstream commit 5d051cf9 ]

Flexcom IP embeds 3 other IPs: usart, i2c, spi and selects the operation
mode (usart, i2c, spi) via mode register (FLEX_MR). On i2c bus there might
be connected critical devices (like PMIC) which on suspend/resume should
be suspended/resumed at the end/beginning. i2c uses
.suspend_noirq/.resume_noirq for this kind of purposes. Align flexcom
to use .resume_noirq as it should be resumed before the embedded IPs.
Otherwise the embedded devices might behave badly.

Fixes: 7fdec110 ("atmel_flexcom: Support resuming after a chip reset")
Signed-off-by: NClaudiu Beznea <claudiu.beznea@microchip.com>
Tested-by: NCodrin Ciubotariu <codrin.ciubotariu@microchip.com>
Acked-by: NNicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211028135138.3481166-3-claudiu.beznea@microchip.comSigned-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/mfd/atmel-flexcom.c

@@ -87,7 +87,7 @@ static const struct of_device_id atmel_flexcom_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, atmel_flexcom_of_match);
 
-static int __maybe_unused atmel_flexcom_resume(struct device *dev)
+static int __maybe_unused atmel_flexcom_resume_noirq(struct device *dev)
 {
 	struct atmel_flexcom *ddata = dev_get_drvdata(dev);
 	int err;
@@ -105,8 +105,9 @@ static int __maybe_unused atmel_flexcom_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(atmel_flexcom_pm_ops, NULL,
-			 atmel_flexcom_resume);
+static const struct dev_pm_ops atmel_flexcom_pm_ops = {
+	.resume_noirq = atmel_flexcom_resume_noirq,
+};
 
 static struct platform_driver atmel_flexcom_driver = {
 	.probe	= atmel_flexcom_probe,