From: Dave Gerlach <d-gerlach@xxxxxx>
Update omapdss driver to set the state of the pins to:
- "default on resume
- "sleep" on suspend
By optionally putting the pins into sleep state in the suspend callback
we can accomplish two things.
- minimize current leakage from pins and thus save power,
- prevent the IP from driving pins output in an uncontrolled manner,
which may happen if the power domain drops the domain regulator.
Signed-off-by: Dave Gerlach <d-gerlach@xxxxxx>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
---
drivers/video/fbdev/omap2/dss/dss.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/video/fbdev/omap2/dss/dss.c b/drivers/video/fbdev/omap2/dss/dss.c
index 9200a8668b49..f95ff319e68e 100644
--- a/drivers/video/fbdev/omap2/dss/dss.c
+++ b/drivers/video/fbdev/omap2/dss/dss.c
@@ -1264,12 +1264,18 @@ static int dss_runtime_suspend(struct device *dev)
{
dss_save_context();
dss_set_min_bus_tput(dev, 0);
+
+ pinctrl_pm_select_sleep_state(dev);
+
return 0;
}
static int dss_runtime_resume(struct device *dev)
{
int r;
+
+ pinctrl_pm_select_default_state(dev);
+
/*
* Set an arbitrarily high tput request to ensure OPP100.
* What we should really do is to make a request to stay in OPP100,
--
2.5.0
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