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

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Date:   Sun, 21 Oct 2018 23:55:01 +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 17/17] ARM: dts: tegra30: colibri: 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-colibri.dtsi | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/arch/arm/boot/dts/tegra30-colibri.dtsi b/arch/arm/boot/dts/tegra30-colibri.dtsi
index 35af03ca9e90..c59099c1e2c3 100644
--- a/arch/arm/boot/dts/tegra30-colibri.dtsi
+++ b/arch/arm/boot/dts/tegra30-colibri.dtsi
@@ -763,8 +763,11 @@
 
 				vddctrl_reg: vddctrl {
 					regulator-name = "+V1.0_VDD_CPU";
-					regulator-min-microvolt = <1150000>;
-					regulator-max-microvolt = <1150000>;
+					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;
 				};
 
@@ -882,13 +885,16 @@
 		};
 
 		/* SW: +V1.2_VDD_CORE */
-		regulator@60 {
+		core_vdd_reg: regulator@60 {
 			compatible = "ti,tps62362";
 			reg = <0x60>;
 
 			regulator-name = "tps62362-vout";
 			regulator-min-microvolt = <900000>;
 			regulator-max-microvolt = <1400000>;
+			regulator-coupled-with = <&vddctrl_reg>;
+			regulator-coupled-max-spread = <300000>;
+			regulator-max-step-microvolt = <100000>;
 			regulator-boot-on;
 			regulator-always-on;
 			ti,vsel0-state-low;
@@ -1027,6 +1033,13 @@
 			 <&tegra_car TEGRA30_CLK_EXTERN1>;
 		clock-names = "pll_a", "pll_a_out0", "mclk";
 	};
+
+	cpus {
+		cpu0: cpu@0 {
+			cpu-supply = <&vddctrl_reg>;
+			core-supply = <&core_vdd_reg>;
+		};
+	};
 };
 
 &gpio {
-- 
2.19.0