Hello.
Kalliguddi, Hema wrote:
With OMAP core-off support musb was not functional as context was getting
lost after wakeup from core-off. And also musb was blocking the core-off
after loading the gadget driver even with no cable connected sometimes.
Added the conext save/restore api in the platform layer which will
be called in the idle and wakeup path.
Changed the usb sysconfig settings as per the usbotg functional spec.
When the device is not active, configure to force idle and force standby mode.
When it is being used, configure in smart standby and smart idle mode.
So while attempting to coreoff the usb is configured to force standby and
force idle mode, after wakeup configured in smart idle and smart standby.
Signed-off-by: Hema HK <hemahk@xxxxxx>
Signed-off-by: Maulik Mankad <x0082077@xxxxxx>
Cc: Felipe Balbi <felipe.balbi@xxxxxxxxx>
Cc: Tony Lindgren <tony@xxxxxxxxxxx>
Cc: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
[...]
Index: linux-omap-pm/drivers/usb/musb/musb_core.c
===================================================================
--- linux-omap-pm.orig/drivers/usb/musb/musb_core.c
2010-08-06 09:24:21.069863329 -0400
+++ linux-omap-pm/drivers/usb/musb/musb_core.c
2010-08-06 10:44:06.369863527 -0400
@@ -2427,11 +2427,6 @@
}
musb_save_context(musb);
-
- if (musb->set_clock)
- musb->set_clock(musb->clock, 0);
- else
- clk_disable(musb->clock);
spin_unlock_irqrestore(&musb->lock, flags);
return 0;
}
@@ -2443,12 +2438,6 @@
if (!musb->clock)
return 0;
-
- if (musb->set_clock)
- musb->set_clock(musb->clock, 1);
- else
- clk_enable(musb->clock);
-
musb_restore_context(musb);
The same question again: are you sure that clocks are auto-gated on
non-OMAP platfroms?
Bon Lui confirmed that there is no clock for blackfin.
What about DaVinci (and the coming DA8xx)?
WBR, Sergei
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