[PATCHv2 5/8] serial: imx: add a flag to indicate we are in the suspend path
From: Eduardo Valentin <edubezval@gmail.com>
Date: 2015-08-11 01:37:31
Also in:
linux-serial, lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
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@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <redacted> Cc: linux-serial@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Eduardo Valentin <edubezval@gmail.com> --- 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