This is a note to let you know that I've just added the patch titled
mfd: sprd: Add wakeup capability for PMIC IRQ
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mfd-sprd-add-wakeup-capability-for-pmic-irq.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a75bfc824a2d33f57ebdc003bfe6b7a9e11e9cb9 Mon Sep 17 00:00:00 2001
From: Baolin Wang <baolin.wang7@xxxxxxxxx>
Date: Tue, 18 Aug 2020 11:41:58 +0800
Subject: mfd: sprd: Add wakeup capability for PMIC IRQ
From: Baolin Wang <baolin.wang7@xxxxxxxxx>
commit a75bfc824a2d33f57ebdc003bfe6b7a9e11e9cb9 upstream.
When changing to use suspend-to-idle to save power, the PMIC irq can not
wakeup the system due to lack of wakeup capability, which will cause
the sub-irqs (such as power key) of the PMIC can not wake up the system.
Thus we can add the wakeup capability for PMIC irq to solve this issue,
as well as removing the IRQF_NO_SUSPEND flag to allow PMIC irq to be
a wakeup source.
Reported-by: Chunyan Zhang <zhang.lyra@xxxxxxxxx>
Signed-off-by: Baolin Wang <baolin.wang7@xxxxxxxxx>
Tested-by: Chunyan Zhang <chunyan.zhang@xxxxxxxxxx>
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mfd/sprd-sc27xx-spi.c | 28 +++++++++++++++++++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
--- a/drivers/mfd/sprd-sc27xx-spi.c
+++ b/drivers/mfd/sprd-sc27xx-spi.c
@@ -212,7 +212,7 @@ static int sprd_pmic_probe(struct spi_de
}
ret = devm_regmap_add_irq_chip(&spi->dev, ddata->regmap, ddata->irq,
- IRQF_ONESHOT | IRQF_NO_SUSPEND, 0,
+ IRQF_ONESHOT, 0,
&ddata->irq_chip, &ddata->irq_data);
if (ret) {
dev_err(&spi->dev, "Failed to add PMIC irq chip %d\n", ret);
@@ -228,9 +228,34 @@ static int sprd_pmic_probe(struct spi_de
return ret;
}
+ device_init_wakeup(&spi->dev, true);
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int sprd_pmic_suspend(struct device *dev)
+{
+ struct sprd_pmic *ddata = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(ddata->irq);
+
+ return 0;
+}
+
+static int sprd_pmic_resume(struct device *dev)
+{
+ struct sprd_pmic *ddata = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(ddata->irq);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(sprd_pmic_pm_ops, sprd_pmic_suspend, sprd_pmic_resume);
+
static const struct of_device_id sprd_pmic_match[] = {
{ .compatible = "sprd,sc2731", .data = &sc2731_data },
{},
@@ -242,6 +267,7 @@ static struct spi_driver sprd_pmic_drive
.name = "sc27xx-pmic",
.bus = &spi_bus_type,
.of_match_table = sprd_pmic_match,
+ .pm = &sprd_pmic_pm_ops,
},
.probe = sprd_pmic_probe,
};
Patches currently in stable-queue which might be from baolin.wang7@xxxxxxxxx are
queue-4.19/mfd-sprd-add-wakeup-capability-for-pmic-irq.patch
