From: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx>
[ Upstream commit 5d051cf94fd5834a1513aa77e542c49fd973988a ]
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: 7fdec11015c3 ("atmel_flexcom: Support resuming after a chip reset")
Signed-off-by: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx>
Tested-by: Codrin Ciubotariu <codrin.ciubotariu@xxxxxxxxxxxxx>
Acked-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxxxxxx>
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20211028135138.3481166-3-claudiu.beznea@xxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/mfd/atmel-flexcom.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/mfd/atmel-flexcom.c b/drivers/mfd/atmel-flexcom.c
index 962f66dc8813e..559eb4d352b68 100644
--- a/drivers/mfd/atmel-flexcom.c
+++ b/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,
--
2.34.1
