linux-kernel - [PATCH 2/5] ARM: dts: am43xx-epos-evm: Keep DCDC3 regulator on in suspend to memory

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Date:   Fri, 29 Mar 2019 12:53:33 -0500
From:   "Andrew F. Davis" <afd@...com>
To:     Benoît Cousson <bcousson@...libre.com>,
        Tony Lindgren <tony@...mide.com>,
        Kevin Hilman <khilman@...nel.org>
CC:     <linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Andrew F . Davis" <afd@...com>
Subject: [PATCH 2/5] ARM: dts: am43xx-epos-evm: Keep DCDC3 regulator on in suspend to memory

From: Mike Erdahl <m-erdahl@...com>

When going to suspend to ram mode (or rtc-only mode), the DDR regulator
must be told to stay on, else this rail will go down when the PMIC_EN
signal is deasserted.

Signed-off-by: Mike Erdahl <m-erdahl@...com>
Signed-off-by: Andrew F. Davis <afd@...com>
---
 arch/arm/boot/dts/am43x-epos-evm.dts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/am43x-epos-evm.dts b/arch/arm/boot/dts/am43x-epos-evm.dts
index 7db5cf3facde..606b848d809f 100644
--- a/arch/arm/boot/dts/am43x-epos-evm.dts
+++ b/arch/arm/boot/dts/am43x-epos-evm.dts
@@ -620,6 +620,12 @@
 			regulator-name = "vdcdc3";
 			regulator-boot-on;
 			regulator-always-on;
+			regulator-state-mem {
+				regulator-on-in-suspend;
+			};
+			regulator-state-disk {
+				regulator-off-in-suspend;
+			};
 		};
 
 		dcdc4: regulator-dcdc4 {
-- 
2.21.0