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OMAPDSS: adopt pinctrl support

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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@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Dave Gerlach 2014-10-31 16:28:57 -05:00 committed by Tomi Valkeinen
parent 420a488278
commit 5038bb8cb2
1 changed files with 6 additions and 0 deletions
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6
drivers/video/fbdev/omap2/dss/dss.c
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@ -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,