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Date: Mon, 10 Dec 2012 11:56:22 +0530
From: Abhilash Kesavan <a.kesavan@...sung.com>
To: lrg@...com, broonie@...nsource.wolfsonmicro.com,
linux-kernel@...r.kernel.org
Cc: dianders@...omium.org, olof@...om.net, grant.likely@...retlab.ca,
thomas.abraham@...aro.org, kgene.kim@...sung.com,
sameo@...ux.intel.com, Abhilash Kesavan <a.kesavan@...sung.com>
Subject: [RFC PATCH 1/3] ARM: DTS: CROS5250: Add regulator operating mode
bindings
Some of the LDOs and BUCKs on the MAX77686 PMIC can be put into a
low power or standby state. Add bindings to control the operating
mode. This results in significant power savings during suspend.
Signed-off-by: Abhilash Kesavan <a.kesavan@...sung.com>
---
arch/arm/boot/dts/cros5250-common.dtsi | 36 ++++++++++++++++++++++++++++++++
1 files changed, 36 insertions(+), 0 deletions(-)
diff --git a/arch/arm/boot/dts/cros5250-common.dtsi b/arch/arm/boot/dts/cros5250-common.dtsi
index 98ff65b..10d1812 100644
--- a/arch/arm/boot/dts/cros5250-common.dtsi
+++ b/arch/arm/boot/dts/cros5250-common.dtsi
@@ -35,6 +35,8 @@
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1000000>;
regulator-always-on;
+ /* Output ON/LPM controlled by PWRREQ */
+ max77686-opmode = <0x40>;
};
ldo2_reg: LDO2 {
@@ -42,6 +44,8 @@
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
+ /* Output ON/OFF controlled by PWRREQ */
+ max77686-opmode = <0x20>;
};
ldo3_reg: LDO3 {
@@ -49,6 +53,8 @@
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
+ /* Output ON/LPM controlled by PWRREQ */
+ max77686-opmode = <0x80>;
};
ldo7_reg: LDO7 {
@@ -56,6 +62,8 @@
regulator-min-microvolt = <1100000>;
regulator-max-microvolt = <1100000>;
regulator-always-on;
+ /* Output ON/OFF controlled by PWRREQ */
+ max77686-opmode = <0x40>;
};
ldo8_reg: LDO8 {
@@ -63,6 +71,8 @@
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1000000>;
regulator-always-on;
+ /* Output ON/OFF controlled by PWRREQ */
+ max77686-opmode = <0x40>;
};
ldo10_reg: LDO10 {
@@ -70,6 +80,8 @@
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
+ /* Output ON/OFF controlled by PWRREQ */
+ max77686-opmode = <0x40>;
};
ldo12_reg: LDO12 {
@@ -77,6 +89,8 @@
regulator-min-microvolt = <3000000>;
regulator-max-microvolt = <3000000>;
regulator-always-on;
+ /* Output ON/OFF controlled by PWRREQ */
+ max77686-opmode = <0x40>;
};
ldo14_reg: LDO14 {
@@ -84,6 +98,8 @@
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
+ /* Output ON/OFF controlled by PWRREQ */
+ max77686-opmode = <0x40>;
};
ldo15_reg: LDO15 {
@@ -91,6 +107,8 @@
regulator-min-microvolt = <1000000>;
regulator-max-microvolt = <1000000>;
regulator-always-on;
+ /* Output ON/OFF controlled by PWRREQ */
+ max77686-opmode = <0x40>;
};
ldo16_reg: LDO16 {
@@ -98,6 +116,8 @@
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
+ /* Output ON/OFF controlled by PWRREQ */
+ max77686-opmode = <0x40>;
};
buck1_reg: BUCK1 {
@@ -106,6 +126,8 @@
regulator-max-microvolt = <1300000>;
regulator-always-on;
regulator-boot-on;
+ /* Output ON/OFF controlled by PWRREQ */
+ max77686-opmode = <0x1>;
};
buck2_reg: BUCK2 {
@@ -114,6 +136,8 @@
regulator-max-microvolt = <1350000>;
regulator-always-on;
regulator-boot-on;
+ /* Output ON/OFF controlled by PWRREQ */
+ max77686-opmode = <0x10>;
};
buck3_reg: BUCK3 {
@@ -122,6 +146,8 @@
regulator-max-microvolt = <1200000>;
regulator-always-on;
regulator-boot-on;
+ /* Output ON/OFF controlled by PWRREQ */
+ max77686-opmode = <0x10>;
};
buck4_reg: BUCK4 {
@@ -130,6 +156,8 @@
regulator-max-microvolt = <1300000>;
regulator-always-on;
regulator-boot-on;
+ /* Output ON/OFF controlled by PWRREQ */
+ max77686-opmode = <0x10>;
};
buck5_reg: BUCK5 {
@@ -138,6 +166,8 @@
regulator-max-microvolt = <1800000>;
regulator-always-on;
regulator-boot-on;
+ /* Output ON */
+ max77686-opmode = <0x3>;
};
buck6_reg: BUCK6 {
@@ -145,6 +175,8 @@
regulator-min-microvolt = <1350000>;
regulator-max-microvolt = <1350000>;
regulator-always-on;
+ /* Output ON */
+ max77686-opmode = <0x3>;
};
buck7_reg: BUCK7 {
@@ -152,6 +184,8 @@
regulator-min-microvolt = <2000000>;
regulator-max-microvolt = <2000000>;
regulator-always-on;
+ /* Output ON */
+ max77686-opmode = <0x3>;
};
buck8_reg: BUCK8 {
@@ -159,6 +193,8 @@
regulator-min-microvolt = <2850000>;
regulator-max-microvolt = <2850000>;
regulator-always-on;
+ /* Output OFF of ENB8 is low */
+ max77686-opmode = <0x1>;
};
};
};
--
1.7.8.6
--
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