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Message-Id: <20220124184106.402832665@linuxfoundation.org>
Date: Mon, 24 Jan 2022 19:34:34 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
Claudiu Beznea <claudiu.beznea@...rochip.com>,
Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>,
Nicolas Ferre <nicolas.ferre@...rochip.com>,
Lee Jones <lee.jones@...aro.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 157/846] mfd: atmel-flexcom: Use .resume_noirq
From: Claudiu Beznea <claudiu.beznea@...rochip.com>
[ 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@...rochip.com>
Tested-by: Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@...rochip.com>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
Link: https://lore.kernel.org/r/20211028135138.3481166-3-claudiu.beznea@microchip.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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
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