Cyclone V SoC Power Optimization

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ID 683713
Date 2/09/2015
Public
Document Table of Contents
Document Table of Contents x
1. Cyclone V SoC Power Optimization
1. Cyclone V SoC Power Optimization x
1.1. Power Reduction 1.2. HPS Power Reduction Methods 1.3. FPGA Power Reduction Methods 1.4. Power Optimization Summary 1.5. Appendix: Power Measurement Techniques for Cyclone V SoC Dev Kit
1.2. HPS Power Reduction Methods x
1.2.1. MPU 1.2.2. Peripherals 1.2.3. HPS Power Reduction Summary
1.2.1. MPU x
1.2.1.1. HPS Method 1: Fit Code in Cache 1.2.1.2. HPS Method 2: Processor Standby Modes and Dynamic Clock Gating 1.2.1.3. HPS Method 3: CPU1 in WFI/WFE or Standby Loop 1.2.1.4. HPS Method 4: Lowering CPU Frequency
1.2.2. Peripherals x
1.2.2.1. HPS Method 5: Energy Efficient Ethernet 1.2.2.2. HPS Method 6: USB Power Management 1.2.2.3. HPS Method 7: Unused Peripherals in Reset
1.3. FPGA Power Reduction Methods x
1.3.1. FPGA Power Consumption 1.3.2. FPGA Portion Power Down 1.3.3. FPGA Power Off Step 1: Board Design (Power Rail) Choices 1.3.4. FPGA Power Off Step 2: Quiet FPGA 1.3.5. FPGA Power Off Step 3: Power Off the FPGA 1.3.6. FPGA Power Off Step 4: Wake up Event for Power on and FPGA Configuration 1.3.7. FPGA Power Off Step 5: Power On and FPGA Reconfiguration Time Considerations
1.5. Appendix: Power Measurement Techniques for Cyclone V SoC Dev Kit x
1.5.1. Power Monitoring and Measurement 1.5.2. Cyclone V SoC Development Kit Power Management ICs 1.5.3. Cyclone V SoC Development Kit Power Monitor Application 1.5.4. LTC LTpower Play Tool 1.5.5. Using the LTC2978A Linux Driver 1.5.6. Power Measurement Results on Cyclone V SoC Development Kit 1.5.7. Document Revision History
1.5.3. Cyclone V SoC Development Kit Power Monitor Application x
1.5.3.1. Starting the Application 1.5.3.2. Windows Instructions 1.5.3.3. Linux Instructions
1.5.4. LTC LTpower Play Tool x
1.5.4.1. Requirements 1.5.4.2. LTC Video Tutorial
1.5.5. Using the LTC2978A Linux Driver x
1.5.5.1. Compiling the Driver 1.5.5.2. Using the Driver
1. Cyclone V SoC Power Optimization

1.5.5.1. Compiling the Driver

After setting up your environment to include a path to the Linaro ARM GCC compiler as is mentioned in the “Linux Kernel” instructions, follow the instructions until after you’ve completed “make ARCH=ARM socfpga_defconfig” step. This step creates a kernel with the default configuration for the “socfpga” (Altera’s SoC FPGA) devices.

  1. Run “make ARCH=ARM menuconfig” and select:

    Device Drivers --->

    Followed by ENTER.

  2. In the “Device Drivers” section look for:

    <> Hardware Monitoring support --->

    Note: Use the space bar to toggle the <> from disabled <> to enabled <*>. Setting it to <M> adds it as a module, which was not tested.

    Hit ENTER to enter go into the “Hardware Monitoring support” section. Browse to: <*> PMBus support --->

  3. Set the <> to <*> and hit ENTER to go to the PMBus support section.

    In this section, find <> Linear Technologies LTC2974, LTC2978, LTC3880, and LTC3883.

  4. Change the <> to <*> to enable the LTC2978A Hardware Monitoring Driver.
  5. Follow the instructions on Rocketboards to build the kernel.
  6. Make ARCH=arm uImage LOADADDR=0x8000.
  7. Copy the resulting zImage from ./arch/arm/boot to the FAT partition of your SD Card and boot Linux.
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