diff mbox series

ARM: dts: microchip: at91-sam9x75_curiosity: Add PMIC suspend voltage configuration

Message ID 20250113071710.40821-1-andrei.simion@microchip.com (mailing list archive)
State New
Headers show
Series ARM: dts: microchip: at91-sam9x75_curiosity: Add PMIC suspend voltage configuration | expand

Commit Message

Andrei Simion Jan. 13, 2025, 7:17 a.m. UTC 
Add missing essential configuration for the PMIC rails, which is necessary
for proper low-power mode operation. This patch adds the required settings
to ensure that the regulators behave correctly during Suspend-to-RAM and
Standby states. Otherwise, after resuming, it receives: "No configuration"
message.

Our driver implements the set_suspend_voltage and set_suspend_mode
callbacks, which require the `regulator-suspend-microvolt` property to be
specified in the device tree for each regulator node. This property defines
the voltage level that the regulator should maintain during suspend mode.

Additionally, according to the datasheet, some regulators need to be turned
on or off during suspend mode. This patch addresses these requirements by
adding the `regulator-on-in-suspend` and `regulator-off-in-suspend`
properties where appropriate.

Fixes: 371a47c9a58a ("ARM: dts: microchip: sam9x75_curiosity: add sam9x75 curiosity board")
Signed-off-by: Andrei Simion <andrei.simion@microchip.com>
---
 .../dts/microchip/at91-sam9x75_curiosity.dts   | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)


base-commit: 37136bf5c3a6f6b686d74f41837a6406bec6b7bc
diff mbox series

Patch

diff --git a/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
index 1a6a909a5043..5514ad10cda5 100644
--- a/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
+++ b/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
@@ -110,10 +110,12 @@  vdd_3v3: VDD_IO {
 
 				regulator-state-standby {
 					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <3300000>;
 					regulator-mode = <4>;
 				};
 
 				regulator-state-mem {
+					regulator-off-in-suspend;
 					regulator-mode = <4>;
 				};
 			};
@@ -128,11 +130,13 @@  vddioddr: VDD_DDR {
 
 				regulator-state-standby {
 					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <1350000>;
 					regulator-mode = <4>;
 				};
 
 				regulator-state-mem {
 					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <1350000>;
 					regulator-mode = <4>;
 				};
 			};
@@ -147,10 +151,12 @@  vddcore: VDD_CORE {
 
 				regulator-state-standby {
 					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <1150000>;
 					regulator-mode = <4>;
 				};
 
 				regulator-state-mem {
+					regulator-off-in-suspend;
 					regulator-mode = <4>;
 				};
 			};
@@ -166,10 +172,12 @@  dcdc4: VDD_OTHER {
 
 				regulator-state-standby {
 					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <1150000>;
 					regulator-mode = <4>;
 				};
 
 				regulator-state-mem {
+					regulator-off-in-suspend;
 					regulator-mode = <4>;
 				};
 			};
@@ -182,6 +190,11 @@  vldo1: LDO1 {
 
 				regulator-state-standby {
 					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <3300000>;
+				};
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
 				};
 			};
 
@@ -192,6 +205,11 @@  vldo2: LDO2 {
 
 				regulator-state-standby {
 					regulator-on-in-suspend;
+					regulator-suspend-microvolt = <1800000>;
+				};
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
 				};
 			};
 		};