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authorAnilKumar Ch <anilkumar@ti.com>2012-08-31 15:07:20 +0530
committerBenoit Cousson <b-cousson@ti.com>2012-10-29 16:56:25 +0100
commitefeedcf2a9137c9be0b833cb76b05315fe231197 (patch)
treef1edfe7ba688fe75e8ac0815b040eaf59c038826 /arch/arm/boot/dts
parent5a8095e9d02da19f3bab738e82c0520ecd62d6af (diff)
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>
Diffstat (limited to 'arch/arm/boot/dts')
-rw-r--r--arch/arm/boot/dts/am335x-bone.dts6
-rw-r--r--arch/arm/boot/dts/am335x-evm.dts6
-rw-r--r--arch/arm/boot/dts/am33xx.dtsi15
3 files changed, 27 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/am335x-bone.dts b/arch/arm/boot/dts/am335x-bone.dts
index c634f87e230e..91eee97371ea 100644
--- 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 185d6325a458..4707cda9e4fe 100644
--- 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 bb31bff01998..b4e3e4793b95 100644
--- 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 */
};
};