linux-kernel - [RFC PATCH v3 1/6] spi: core: add support for wakeup-source dts property

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Date:   Wed, 21 Jun 2017 18:01:48 +0800
From:   Jeffy Chen <jeffy.chen@...k-chips.com>
To:     linux-kernel@...r.kernel.org
Cc:     briannorris@...omium.org, dmitry.torokhov@...il.com,
        dianders@...omium.org, Jeffy Chen <jeffy.chen@...k-chips.com>,
        Mark Brown <broonie@...nel.org>, linux-spi@...r.kernel.org
Subject: [RFC PATCH v3 1/6] spi: core: add support for wakeup-source dts property

Use generic wakeup-source property to enable spi device wakeup.

Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>
---

Changes in v3: None

 drivers/spi/spi.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index c3f6b52..a510bba 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -547,11 +547,16 @@ int spi_add_device(struct spi_device *spi)
 
 	/* Device may be bound to an active driver when this returns */
 	status = device_add(&spi->dev);
-	if (status < 0)
+	if (status < 0) {
 		dev_err(dev, "can't add %s, status %d\n",
-				dev_name(&spi->dev), status);
-	else
-		dev_dbg(dev, "registered child %s\n", dev_name(&spi->dev));
+			dev_name(&spi->dev), status);
+		goto done;
+	}
+
+	dev_dbg(dev, "registered child %s\n", dev_name(&spi->dev));
+
+	if (device_property_read_bool(&spi->dev, "wakeup-source"))
+		device_init_wakeup(&spi->dev, true);
 
 done:
 	mutex_unlock(&spi_add_lock);
@@ -638,6 +643,8 @@ void spi_unregister_device(struct spi_device *spi)
 	if (!spi)
 		return;
 
+	device_init_wakeup(&spi->dev, false);
+
 	if (spi->dev.of_node) {
 		of_node_clear_flag(spi->dev.of_node, OF_POPULATED);
 		of_node_put(spi->dev.of_node);
-- 
2.1.4