On 06/27/2013 05:45 PM, Tony Lindgren wrote:
* Grygorii Strashko <grygorii.strashko@xxxxxx> [130627 07:12]:
As you can see, from 12 pins only 3 pins need to be reconfigured
while switching from "active"->"idle" states and back (and as I
mentioned above for OMAP "idle" == "sleep" now).
Regarding "OFF" state:
OMAP mux HW defines special state for unused pins which is selected
by default after reset and need to be selected when device isn't
used, for example:
_MUXMODE - Functional multiplexing selection for pad
0x0: Select usbb1_hsic_data
0x3: Select gpio_96
0x7: Select safe_mode <<--- pin unused
The off mode bits can be enabled continuously, the mux hardware
automatically sets them. So sounds like you don't need any
separate "idle" "sleep" and "off" states, the following should
do:
"default" (or "static") static pins that don't need to be touched
after consumer driver probe
"active" dynamic pins that are not a subset of
"default" needed for runtime; these pins
are the same as "idle" below, but with
different muxing or pinconf device
runtime
"idle" dynamic pins that are not a subset of
"default" needed for various idle modes;
these pins are the same as "active" above,
but with different muxing or pinconf for
various idle states
Can you please confirm that these named modes are enough for
your needs?
Confirm )
If your hardware does not have specific off mode bits, then
I can understand that you may need one mor state "off".
Regards,
Tony
Regards,
-grygorii
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
