This is a simple flag that gets set across prepare and complete
callbacks in the suspend path. We the flag we may avoid
runtime pm idling at the same time.
Cc: Fabio Estevam <festevam@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Jiri Slaby <jslaby@xxxxxxxx>
Cc: linux-serial@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Eduardo Valentin <edubezval@xxxxxxxxx>
---
drivers/tty/serial/imx.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index fe3d41c..50abb60 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -218,6 +218,8 @@ struct imx_port {
wait_queue_head_t dma_wait;
unsigned int saved_reg[10];
bool context_saved;
+
+ bool is_suspending;
};
struct imx_port_ucrs {
@@ -2026,6 +2028,22 @@ static void serial_imx_enable_wakeup(struct imx_port *sport, bool on)
writel(val, sport->port.membase + UCR1);
}
+static int serial_imx_prepare(struct device *dev)
+{
+ struct imx_port *sport = dev_get_drvdata(dev);
+
+ sport->is_suspending = true;
+
+ return 0;
+}
+
+static void serial_imx_complete(struct device *dev)
+{
+ struct imx_port *sport = dev_get_drvdata(dev);
+
+ sport->is_suspending = false;
+}
+
static int imx_serial_port_suspend_noirq(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
@@ -2091,6 +2109,8 @@ static const struct dev_pm_ops imx_serial_port_pm_ops = {
.resume_noirq = imx_serial_port_resume_noirq,
.suspend = imx_serial_port_suspend,
.resume = imx_serial_port_resume,
+ .prepare = serial_imx_prepare,
+ .complete = serial_imx_complete,
};
static struct platform_driver serial_imx_driver = {
--
2.5.0
--
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