Hi Sekhar, On Thu, Feb 14, 2013 at 12:29:11, Nori, Sekhar wrote: > On 2/14/2013 10:46 AM, Vishwanathrao Badarkhe, Manish wrote: > > Hi Sekhar, > > > > On Thu, Feb 14, 2013 at 09:48:59, Nori, Sekhar wrote: > >> Manish, > >> > >> On 1/31/2013 2:56 PM, Vishwanathrao Badarkhe, Manish wrote: > >>> As per OMAP-L138 TRM, Software must poll for SLEEPCOMPLETE bit until > >>> it is set to 1 before clearing SLEEPENABLE bit in DEEPSLEEP register > >>> in resume routine. > >>> Modifications are as per datasheet: > >>> http://www.ti.com/lit/ug/spruh77a/spruh77a.pdf > >>> See sections 10.10.2.2 and 11.5.21 for more detailed explanation. > >> > >> Polling for SLEEPCOMPLETE is not required in RTC controlled wake-up which > >> is the mode currently supported (see section 10.10.2.1 of the TRM). > >> Polling for SLEEPCOMPLETE is required for external controlled wake-up > >> which to my knowledge has never been tested. If you have tested this with > >> external controlled wakep-up, then I can consider this patch. > >> Else, I would like to take it only after externally controlled wake-up is > >> fully tested/supported instead of taking bits and pieces. > > > > Yes, for RTC controlled wakeup, this polling is not required as per section > > 10.10.2.1. > > But if we see in section 10.10.2.2 (Exiting Deep Sleep Mode) step 2, > > When sleep count completes SLEEPCOMPLETE bit gets sets in DEEPSLEEP > > register till that it's not safe to release clock to devices. So If we > > don’t poll for SLEEPCOMPLETE, this delay will not come into picture > > which we actually set while entering deep sleep in case of RTC controlled > > wakeup (Section 10.10.2.1 step 9). > > Please let me know, whether these understanding is correct? > > The delay is coming from hardware. Till SLEEPCOUNT completes, the clock to > device is not provided. There is no need to poll for SLEEPCOMPLETE and indeed > 10.10.2.2 does not ask for this bit to be polled.
Thanks for your explanation. Ok, I will test this patch with external controlled wakeup and update you. Regards, Manish Badarkhe N�����r��y����b�X��ǧv�^�){.n�+����{����zX����ܨ}���Ơz�&j:+v�������zZ+��+zf���h���~����i���z��w���?�����&�)ߢf��^jǫy�m��@A�a��� 0��h���i