question: mx7ulp - LDO_ENABLED_MODE
Jorge Ramirez-Ortiz, Foundries
jorge at foundries.io
Thu Jan 16 21:30:00 CET 2020
Hi Fabio,
I am trying to enable LDO in an imx7ulp based board but somehow the
board locks up as soon I write to PMC1_RUN (using the init_ldo_mode
sequence).
I think it is interesting that bit PMC0_CTRL_PMC1ON is already set so
I am wondering if you think it is possible - in your experience- that
ROM might have already configured LDO? or was this also the case -
this bit already set- when you tested the feature?
I also noticed that if I dont execute the init_ldo_mode sequence and
just check for the LODEN bit [see snipet below], this is already set
which too seems strange.
any suggestions or thoughts?
thanks in advance!
Jorge
#define PMC0_BASE_ADDR 0x410a1000
#define PMC0_CTRL 0x28
#define PMC0_CTRL_LDOEN BIT(31)
static bool ldo_mode_is_enabled(void)
{
unsigned int reg;
reg = readl(PMC0_BASE_ADDR + PMC0_CTRL);
if (reg & PMC0_CTRL_LDOEN)
return true;
else
return false;
}
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