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Commit 88ccabbd authored by Baolin Wang's avatar Baolin Wang Committed by Greg Kroah-Hartman
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mfd: sprd: Add wakeup capability for PMIC IRQ 



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: default avatarChunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: default avatarBaolin Wang <baolin.wang7@gmail.com>
Tested-by: default avatarChunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 58953e87

drivers/mfd/sprd-sc27xx-spi.c

+27 −1
Original line number Diff line number Diff line
@@ -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,

};