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ARM: dts: AM33XX: Add device tree OPP table

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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>
This commit is contained in:
AnilKumar Ch 2012-08-31 15:07:20 +05:30 committed by Benoit Cousson
parent 5a8095e9d0
commit efeedcf2a9
3 changed files with 27 additions and 0 deletions
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6
arch/arm/boot/dts/am335x-bone.dts
View File

@ -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 */

6
arch/arm/boot/dts/am335x-evm.dts
View File

@ -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 */

15
arch/arm/boot/dts/am33xx.dtsi
View File

@ -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 */
};
};