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* [U-Boot] [PATCH v2 1/6] mx7ulp: Print the LDO mode status
@ 2019-10-30 13:41 Fabio Estevam
  2019-10-30 13:41 ` [U-Boot] [PATCH v2 2/6] mx7ulp: Introduce the CONFIG_LDO_ENABLED_MODE option Fabio Estevam
                   ` (4 more replies)
  0 siblings, 5 replies; 8+ messages in thread
From: Fabio Estevam @ 2019-10-30 13:41 UTC (permalink / raw)
  To: u-boot

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>
---
Changes since v1:
- None

 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
-- 
2.17.1

^ permalink raw reply related	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2019-11-05 12:49 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2019-10-30 13:41 [U-Boot] [PATCH v2 1/6] mx7ulp: Print the LDO mode status Fabio Estevam
2019-10-30 13:41 ` [U-Boot] [PATCH v2 2/6] mx7ulp: Introduce the CONFIG_LDO_ENABLED_MODE option Fabio Estevam
2019-10-30 13:41 ` [U-Boot] [PATCH v2 3/6] mx7ulp: Remove the _RUN notation from the PMC1 LDOVL definitions Fabio Estevam
2019-10-30 13:41 ` [U-Boot] [PATCH v2 4/6] mx7ulp: scg: Remove unnused scg_a7_apll_init() Fabio Estevam
2019-10-30 13:41 ` [U-Boot] [PATCH v2 5/6] mx7ulp: Sync the device tree related files Fabio Estevam
2019-10-30 13:41 ` [U-Boot] [PATCH v2 6/6] mx7ulp: Add support for Embedded Artists COM board Fabio Estevam
2019-11-05  5:57   ` Peng Fan
2019-11-05 12:49     ` Fabio Estevam

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