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mfd: sprd: Add wakeup capability for PMIC IRQ 

commit a75bfc824a 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@gmail.com>
Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Tested-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Baolin Wang 2020-08-18 11:41:58 +08:00 committed by Greg Kroah-Hartman
parent 58953e8734
commit 88ccabbd20
1 changed files with 27 additions and 1 deletions
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28
drivers/mfd/sprd-sc27xx-spi.c
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@ -204,7 +204,7 @@ static int sprd_pmic_probe(struct spi_device *spi)
}
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);
@ -220,9 +220,34 @@ static int sprd_pmic_probe(struct spi_device *spi)
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 },
{},
@ -234,6 +259,7 @@ static struct spi_driver sprd_pmic_driver = {
.name = "sc27xx-pmic",
.bus = &spi_bus_type,
.of_match_table = sprd_pmic_match,
.pm = &sprd_pmic_pm_ops,
},
.probe = sprd_pmic_probe,
};