i.MX31 suspend and VSTBY question
helmut.raiger at hale.at
Mon Mar 21 12:19:43 EDT 2011
Thanks for your response! Your CCMR register setting does not change the
behaviour on my board.
A few questions:
1) What kernel version are you running?
2) Did you verify the VSTBY pin action (i.e. pin changes to high in
state retention mode and the pmic changes the voltages to their
programmed standby mode) ?
3) As I already mentioned in my first post, the VSTBY signal is
asserted, when I use a LTIB 2.6.21 build, but not in 2.6.38-rc1+
> For our release that has LPM working:
> /* Enable Well Bias and set VSTBY
> * VSTBY pin will be asserted during SR mode. This asks the
> * PM IC to set the core voltage to the standby voltage
> * Must clear the MXC_CCM_CCMR_SBYCS bit as well */
> MXC_CCM_CCMR_WBEN | MXC_CCM_CCMR_VSTBY |
> MXC_CCM_CCMR_WBEN | MXC_CCM_CCMR_VSTBY);
Scanned by MailScanner.
More information about the linux-arm-kernel