From: "Nagendra" <nagendra@mistralsolutions.com>
To: linux-omap@vger.kernel.org
Cc: ratheesh@mistralsolutions.com
Subject: OMAP3 - PM - Question - Disabling CLKEN and HFCLKOUT signals from TWL4030 scripts
Date: Fri, 21 Jan 2011 14:14:30 +0530 [thread overview]
Message-ID: <005301cbb947$6d682730$48387590$@com> (raw)
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.
next reply other threads:[~2011-01-21 8:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-21 8:44 Nagendra [this message]
2011-01-21 10:14 ` OMAP3 - PM - Question - Disabling CLKEN and HFCLKOUT signals from TWL4030 scripts Lesly A M
2011-01-21 17:50 ` Nagendra
2011-01-24 5:22 ` Lesly A M
2011-01-24 16:50 ` Nagendra
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