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[1/2] ASoC: rt5514: Voice wakeup support.

Message ID 1510124662-5065-1-git-send-email-oder_chiou@realtek.com (mailing list archive)
State Accepted
Commit 58f1c07d23cddbc4c8aa99a214934eb7d33e8523
Headers show

Commit Message

Oder Chiou Nov. 8, 2017, 7:04 a.m. UTC 
If the rt5514 Wake on Voice device is opened while suspended, it will
be able to wake up the system when a voice command is detected.
This patch also supports user-space policy to override wakeup behavior
by /sys/bus/spi/drivers/rt5514/spi2.0/power/wakeup.

Signed-off-by: Chinyue Chen <chinyue@chromium.org>
Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
---
 sound/soc/codecs/rt5514-spi.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
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Patch

diff --git a/sound/soc/codecs/rt5514-spi.c b/sound/soc/codecs/rt5514-spi.c
index b90d6d5..0c0e209 100644
--- a/sound/soc/codecs/rt5514-spi.c
+++ b/sound/soc/codecs/rt5514-spi.c
@@ -448,9 +448,35 @@  static int rt5514_spi_probe(struct spi_device *spi)
 		return ret;
 	}
 
+	device_init_wakeup(&spi->dev, true);
+
+	return 0;
+}
+
+static int rt5514_suspend(struct device *dev)
+{
+	int irq = to_spi_device(dev)->irq;
+
+	if (device_may_wakeup(dev))
+		enable_irq_wake(irq);
+
 	return 0;
 }
 
+static int rt5514_resume(struct device *dev)
+{
+	int irq = to_spi_device(dev)->irq;
+
+	if (device_may_wakeup(dev))
+		disable_irq_wake(irq);
+
+	return 0;
+}
+
+static const struct dev_pm_ops rt5514_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(rt5514_suspend, rt5514_resume)
+};
+
 static const struct of_device_id rt5514_of_match[] = {
 	{ .compatible = "realtek,rt5514", },
 	{},
@@ -460,6 +486,7 @@  MODULE_DEVICE_TABLE(of, rt5514_of_match);
 static struct spi_driver rt5514_spi_driver = {
 	.driver = {
 		.name = "rt5514",
+		.pm = &rt5514_pm_ops,
 		.of_match_table = of_match_ptr(rt5514_of_match),
 	},
 	.probe = rt5514_spi_probe,