linux-kernel - [RFC PATCH v2 08/17] ARM: dts: tegra20: colibri: Setup voltage regulators for DVFS

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Message-Id: <20181021205501.23943-9-digetx@gmail.com>
Date:   Sun, 21 Oct 2018 23:54:52 +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 08/17] ARM: dts: tegra20: 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/tegra20-colibri.dtsi | 31 ++++++++++++++++++--------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/arch/arm/boot/dts/tegra20-colibri.dtsi b/arch/arm/boot/dts/tegra20-colibri.dtsi
index 6162d193e12c..5b3155dbf47a 100644
--- a/arch/arm/boot/dts/tegra20-colibri.dtsi
+++ b/arch/arm/boot/dts/tegra20-colibri.dtsi
@@ -495,17 +495,19 @@
 					regulator-always-on;
 				};
 
-				sm0 {
+				core_vdd_reg: sm0 {
 					regulator-name = "VDD_CORE_1.2V";
-					regulator-min-microvolt = <1200000>;
-					regulator-max-microvolt = <1200000>;
+					regulator-min-microvolt = <1000000>;
+					regulator-max-microvolt = <1300000>;
+					regulator-coupled-with = <&rtc_vdd_reg>;
+					regulator-coupled-max-spread = <150000>;
 					regulator-always-on;
 				};
 
-				sm1 {
+				cpu_vdd_reg: sm1 {
 					regulator-name = "VDD_CPU_1.0V";
-					regulator-min-microvolt = <1000000>;
-					regulator-max-microvolt = <1000000>;
+					regulator-min-microvolt = <750000>;
+					regulator-max-microvolt = <1125000>;
 					regulator-always-on;
 				};
 
@@ -530,10 +532,13 @@
 					regulator-always-on;
 				};
 
-				ldo2 {
+				rtc_vdd_reg: ldo2 {
 					regulator-name = "VDD_RTC_1.2V";
-					regulator-min-microvolt = <1200000>;
-					regulator-max-microvolt = <1200000>;
+					regulator-min-microvolt = <950000>;
+					regulator-max-microvolt = <1300000>;
+					regulator-coupled-with = <&core_vdd_reg>;
+					regulator-coupled-max-spread = <150000>;
+					regulator-always-on;
 				};
 
 				/* LDO3 is not connected to anything */
@@ -740,6 +745,14 @@
 			 <&tegra_car TEGRA20_CLK_CDEV1>;
 		clock-names = "pll_a", "pll_a_out0", "mclk";
 	};
+
+	cpus {
+		cpu0: cpu@0 {
+			cpu-supply = <&cpu_vdd_reg>;
+			core-supply = <&core_vdd_reg>;
+			rtc-supply = <&rtc_vdd_reg>;
+		};
+	};
 };
 
 &gpio {
-- 
2.19.0