linux-kernel - [RFC PATCH v2 16/17] ARM: dts: tegra30: cardhu: Setup voltage regulators for DVFS

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Date:   Sun, 21 Oct 2018 23:55:00 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Nishanth Menon <nm@...com>, Stephen Boyd <sboyd@...nel.org>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>
Cc:     linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH v2 16/17] ARM: dts: tegra30: cardhu: Setup voltage regulators for DVFS

Set min/max regulators voltage and add CPU node that hooks up CPU with
voltage regulators.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 arch/arm/boot/dts/tegra30-cardhu.dtsi | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/arch/arm/boot/dts/tegra30-cardhu.dtsi b/arch/arm/boot/dts/tegra30-cardhu.dtsi
index fb9222b479d2..5fcf5ac09530 100644
--- a/arch/arm/boot/dts/tegra30-cardhu.dtsi
+++ b/arch/arm/boot/dts/tegra30-cardhu.dtsi
@@ -272,8 +272,11 @@
 
 				vddctrl_reg: vddctrl {
 					regulator-name = "vdd_cpu,vdd_sys";
-					regulator-min-microvolt = <1000000>;
-					regulator-max-microvolt = <1000000>;
+					regulator-min-microvolt = <800000>;
+					regulator-max-microvolt = <1250000>;
+					regulator-coupled-with = <&core_vdd_reg>;
+					regulator-coupled-max-spread = <300000>;
+					regulator-max-step-microvolt = <100000>;
 					regulator-always-on;
 				};
 
@@ -342,13 +345,16 @@
 			interrupts = <TEGRA_GPIO(CC, 2) IRQ_TYPE_LEVEL_LOW>;
 		};
 
-		tps62361@60 {
+		core_vdd_reg: tps62361@60 {
 			compatible = "ti,tps62361";
 			reg = <0x60>;
 
 			regulator-name = "tps62361-vout";
 			regulator-min-microvolt = <500000>;
 			regulator-max-microvolt = <1500000>;
+			regulator-coupled-with = <&vddctrl_reg>;
+			regulator-coupled-max-spread = <300000>;
+			regulator-max-step-microvolt = <100000>;
 			regulator-boot-on;
 			regulator-always-on;
 			ti,vsel0-state-high;
@@ -649,4 +655,11 @@
 			debounce-interval = <10>;
 		};
 	};
+
+	cpus {
+		cpu0: cpu@0 {
+			cpu-supply = <&vddctrl_reg>;
+			core-supply = <&core_vdd_reg>;
+		};
+	};
 };
-- 
2.19.0