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| author | Claudiu Beznea <claudiu.beznea@microchip.com> | 2021-10-28 15:51:38 +0200 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2021-11-29 14:16:59 +0100 |
| commit | 5d051cf94fd5834a1513aa77e542c49fd973988a (patch) | |
| tree | 171b8b3602ce685b06a0cf345bdda42a7217630c /drivers/mfd | |
| parent | mfd: atmel-flexcom: Remove #ifdef CONFIG_PM_SLEEP (diff) | |
| download | linux-5d051cf94fd5834a1513aa77e542c49fd973988a.tar.xz linux-5d051cf94fd5834a1513aa77e542c49fd973988a.zip | |
mfd: atmel-flexcom: Use .resume_noirq
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@microchip.com>
Tested-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211028135138.3481166-3-claudiu.beznea@microchip.com
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/atmel-flexcom.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/mfd/atmel-flexcom.c b/drivers/mfd/atmel-flexcom.c index 962f66dc8813..559eb4d352b6 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, |