As per the i.MX7ULP datasheet, it can boot in LDO enabled mode or LDO bypass mode.
Print the LDO mode status in the U-Boot log for convenience.
Signed-off-by: Fabio Estevam festevam@gmail.com --- arch/arm/mach-imx/mx7ulp/soc.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/arch/arm/mach-imx/mx7ulp/soc.c b/arch/arm/mach-imx/mx7ulp/soc.c index 127fcfeea1..b9a108a514 100644 --- a/arch/arm/mach-imx/mx7ulp/soc.c +++ b/arch/arm/mach-imx/mx7ulp/soc.c @@ -131,6 +131,21 @@ const char *get_imx_type(u32 imxtype) return "7ULP"; }
+#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; +} + int print_cpuinfo(void) { u32 cpurev; @@ -159,6 +174,11 @@ int print_cpuinfo(void) break; }
+ if (ldo_mode_is_enabled()) + printf("PMC1: LDO enabled mode\n"); + else + printf("PMC1: LDO bypass mode\n"); + return 0; } #endif