ARM: dts: AM33XX: Add device tree OPP table

Add DT OPP table for AM33XX family of devices. This data is
decoded by OF with of_init_opp_table() helper function.

Also adds cpu0 supply name to the corresponding dts files.
cpu0-supply name is used by cpufreq-cpu0 driver to get the
regulator pointer for voltage modifications.

Signed-off-by: AnilKumar Ch <anilkumar@ti.com>
Signed-off-by: Benoit Cousson <b-cousson@ti.com>

diff --git a/arch/arm/boot/dts/am335x-bone.dts b/arch/arm/boot/dts/am335x-bone.dts
index c634f87..91eee97 100644 (file)
--- a/arch/arm/boot/dts/am335x-bone.dts
+++ b/arch/arm/boot/dts/am335x-bone.dts
@@ -13,6 +13,12 @@
        model = "TI AM335x BeagleBone";
        compatible = "ti,am335x-bone", "ti,am33xx";
 
+       cpus {
+               cpu@0 {
+                       cpu0-supply = <&dcdc2_reg>;
+               };
+       };
+
        memory {
                device_type = "memory";
                reg = <0x80000000 0x10000000>; /* 256 MB */

diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts
index 185d632..4707cda 100644 (file)
--- a/arch/arm/boot/dts/am335x-evm.dts
+++ b/arch/arm/boot/dts/am335x-evm.dts
@@ -13,6 +13,12 @@
        model = "TI AM335x EVM";
        compatible = "ti,am335x-evm", "ti,am33xx";
 
+       cpus {
+               cpu@0 {
+                       cpu0-supply = <&vdd1_reg>;
+               };
+       };
+
        memory {
                device_type = "memory";
                reg = <0x80000000 0x10000000>; /* 256 MB */

diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index bb31bff..b4e3e47 100644 (file)
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -25,6 +25,21 @@
        cpus {
                cpu@0 {
                        compatible = "arm,cortex-a8";
+
+                       /*
+                        * To consider voltage drop between PMIC and SoC,
+                        * tolerance value is reduced to 2% from 4% and
+                        * voltage value is increased as a precaution.
+                        */
+                       operating-points = <
+                               /* kHz    uV */
+                               720000  1285000
+                               600000  1225000
+                               500000  1125000
+                               275000  1125000
+                       >;
+                       voltage-tolerance = <2>; /* 2 percentage */
+                       clock-latency = <300000>; /* From omap-cpufreq driver */
                };
        };