From: Shubhrajyoti Datta <shubhrajyoti.datta@xxxxxxxxxx>
Add suspend and resume handlers for uartlite
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xxxxxxxxxx>
---
v2:
patch added
drivers/tty/serial/uartlite.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/drivers/tty/serial/uartlite.c b/drivers/tty/serial/uartlite.c
index b3a12be..98d3ead 100644
--- a/drivers/tty/serial/uartlite.c
+++ b/drivers/tty/serial/uartlite.c
@@ -690,9 +690,44 @@ static int ulite_release(struct device *dev)
return rc;
}
+/**
+ * ulite_suspend - Stop the device.
+ *
+ * @dev: handle to the device structure.
+ * Return: 0 always.
+ */
+static int __maybe_unused ulite_suspend(struct device *dev)
+{
+ struct uart_port *port = dev_get_drvdata(dev);
+
+ if (port)
+ uart_suspend_port(&ulite_uart_driver, port);
+
+ return 0;
+}
+
+/**
+ * ulite_resume - Resume the device.
+ *
+ * @dev: handle to the device structure.
+ * Return: 0 on success, errno otherwise.
+ */
+static int __maybe_unused ulite_resume(struct device *dev)
+{
+ struct uart_port *port = dev_get_drvdata(dev);
+
+ if (port)
+ uart_resume_port(&ulite_uart_driver, port);
+
+ return 0;
+}
+
/* ---------------------------------------------------------------------
* Platform bus binding
*/
+
+static SIMPLE_DEV_PM_OPS(ulite_pm_ops, ulite_suspend, ulite_resume);
+
#if defined(CONFIG_OF)
/* Match table for of_platform binding */
static const struct of_device_id ulite_of_match[] = {
@@ -768,6 +803,7 @@ static struct platform_driver ulite_platform_driver = {
.driver = {
.name = "uartlite",
.of_match_table = of_match_ptr(ulite_of_match),
+ .pm = &ulite_pm_ops,
},
};
--
2.7.4
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