From: Jorge Ramirez-Ortiz, Foundries <jorge@foundries.io>
To: u-boot@lists.denx.de
Subject: question: mx7ulp - LDO_ENABLED_MODE
Date: Thu, 16 Jan 2020 21:30:00 +0100 [thread overview]
Message-ID: <20200116203000.GA21781@trex> (raw)
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;
}
next reply other threads:[~2020-01-16 20:30 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-16 20:30 Jorge [this message]
2020-01-16 21:33 ` question: mx7ulp - LDO_ENABLED_MODE Fabio Estevam
2020-01-16 21:51 ` Fabio Estevam
2020-01-16 22:04 ` Fabio Estevam
2020-01-16 22:24 ` Jorge
2020-01-16 22:38 ` Fabio Estevam
2020-01-17 9:24 ` Jorge
2020-01-16 22:01 ` Jorge
2020-01-17 13:26 ` Fabio Estevam
2020-01-17 14:26 ` Jorge
2020-01-17 16:51 ` Jorge
2020-01-17 17:18 ` Fabio Estevam
2020-01-17 18:40 ` Jorge
2020-01-17 18:53 ` Fabio Estevam
2020-01-17 19:02 ` Jorge
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