From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Nagendra" <nagendra@mistralsolutions.com>
Subject: OMAP3 - PM - Question - Disabling CLKEN and HFCLKOUT signals from TWL4030 scripts
Date: Fri, 21 Jan 2011 14:14:30 +0530
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To: linux-omap@vger.kernel.org
Cc: ratheesh@mistralsolutions.com

Hi All,

We are working on Power management on OMAP3 (3530) and I am trying to
disable CLKEN and HFCLKOUT through TWL4030 power scripts. However we have
not been able to achieve this. 

Following are the changes and tests done so far.

- VAUX1, CLKEN and HFCLKOUT were assigned to P1 group. 
- Wrote Singular messages to turn on/off these signals in TWL4030 scripts. 
- We observed that VAUX1 is able to switch ON/OFF properly as per the script
but HFCLKOUT and CLKEN are not behaving as expected. 
- However if we try writing CLKEN_DEV_GRP to zero, CLKEN is going low. 
- We have made sure that SYS_OFF_MODE and CLK_REQ signals go low during the
system OFF mode, LVL_WAKEUP bit enabled in Px_SW_EVENTS, and STS_CHG bit in
STS_HW_CONDITIONS is zero. 

Is there anything that I am missing? Kindly let me know. 

Part number of TPS used in our board is TPS65950 BZXNR

with regards,
- Nagendra.