We have no need for the Ethernet module (CSL_PSC_3PSW) and we would like to disable that module to reduce power. I used the following code to try to achieve this it appears to hang waiting for the state change. We used JTAG to look at the state of the clock which is still active. The code seems to be effective for other modules such as I2C and VICP. Is there something special about the 2nd power domain?
/*! \brief Set the state of PSC modeule */
void bspDisablePSC(int dev)
{
CSL_PscRegsOvly pscRegs = (CSL_PscRegsOvly)CSL_PSC_0_REGS;
if (dev < 0 || dev > 34)
return;
if (CSL_FEXT(pscRegs->MDSTAT[dev], PSC_MDSTAT_STATE)
== CSL_PSC_MDSTAT_STATE_DISABLE)
return;
// deassert GPIO local PSC reset and set NEXT state to DISBLE
pscRegs->MDCTL[dev] = CSL_FMKT(PSC_MDCTL_NEXT, DISABLE)
| CSL_FMKT(PSC_MDCTL_LRST, DEASSERT);
// move GPIO PSC to Next state
if (dev == CSL_PSC_3PSW)
pscRegs->PTCMD = CSL_FMKT(PSC_PTCMD_GO0, SET) << 1;
else
pscRegs->PTCMD = CSL_FMKT(PSC_PTCMD_GO0, SET);
// wait for transition
while (CSL_FEXT(pscRegs->MDSTAT[dev], PSC_MDSTAT_STATE)
!= CSL_PSC_MDSTAT_STATE_DISABLE)
;
}
/*! \brief Set the state of PSC modeule */
void bspSWRDisablePSC(int dev)
{
CSL_PscRegsOvly pscRegs = (CSL_PscRegsOvly)CSL_PSC_0_REGS;
if (dev < 0 || dev > 34)
return;
if (CSL_FEXT(pscRegs->MDSTAT[dev], PSC_MDSTAT_STATE)
== CSL_PSC_MDSTAT_STATE_SWRSTDISABLE)
return;
// deassert GPIO local PSC reset and set NEXT state to DISABLE
pscRegs->MDCTL[dev] = CSL_FMKT(PSC_MDCTL_NEXT, SWRSTDISABLE)
| CSL_FMKT(PSC_MDCTL_LRST, DEASSERT);
// move GPIO PSC to Next state
if (dev == CSL_PSC_3PSW)
pscRegs->PTCMD = CSL_FMKT(PSC_PTCMD_GO0, SET) << 1;
else
pscRegs->PTCMD = CSL_FMKT(PSC_PTCMD_GO0, SET);
// wait for transition
while (CSL_FEXT(pscRegs->MDSTAT[dev], PSC_MDSTAT_STATE)
!= CSL_PSC_MDSTAT_STATE_SWRSTDISABLE)
;
}
void mainTask ( void )
{
:
bspDisablePSC(CSL_PSC_3PSW);
Thanks
