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Commit 4e20d65b authored by Baolin Wang's avatar Baolin Wang Committed by Todd Kjos
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UPSTREAM: mfd: sprd: Add wakeup capability for PMIC IRQ 



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>
Bug: 173341055
(cherry picked from commit a75bfc824a2d33f57ebdc003bfe6b7a9e11e9cb9)
Signed-off-by: default avatarChunyan Zhang <zhang.lyra@gmail.com>
Change-Id: Ibe5f907b96d59e8b02e8e4838fc8b3cde5f4f35e
parent 5eaa11cf

drivers/mfd/sprd-sc27xx-spi.c

+27 −1
Original line number Diff line number Diff line
@@ -256,7 +256,7 @@ 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);
@@ -272,9 +272,34 @@ 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 },

	{},
@@ -286,6 +311,7 @@ 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,

};