| ==================================== |
| Xilinx Zynq MPSoC EEMI Documentation |
| ==================================== |
| |
| Xilinx Zynq MPSoC Firmware Interface |
| ------------------------------------- |
| The zynqmp-firmware node describes the interface to platform firmware. |
| ZynqMP has an interface to communicate with secure firmware. Firmware |
| driver provides an interface to firmware APIs. Interface APIs can be |
| used by any driver to communicate with PMC(Platform Management Controller). |
| |
| Embedded Energy Management Interface (EEMI) |
| ---------------------------------------------- |
| The embedded energy management interface is used to allow software |
| components running across different processing clusters on a chip or |
| device to communicate with a power management controller (PMC) on a |
| device to issue or respond to power management requests. |
| |
| Any driver who wants to communicate with PMC using EEMI APIs use the |
| functions provided for each function. |
| |
| IOCTL |
| ------ |
| IOCTL API is for device control and configuration. It is not a system |
| IOCTL but it is an EEMI API. This API can be used by master to control |
| any device specific configuration. IOCTL definitions can be platform |
| specific. This API also manage shared device configuration. |
| |
| The following IOCTL IDs are valid for device control: |
| - IOCTL_SET_PLL_FRAC_MODE 8 |
| - IOCTL_GET_PLL_FRAC_MODE 9 |
| - IOCTL_SET_PLL_FRAC_DATA 10 |
| - IOCTL_GET_PLL_FRAC_DATA 11 |
| |
| Refer EEMI API guide [0] for IOCTL specific parameters and other EEMI APIs. |
| |
| References |
| ---------- |
| [0] Embedded Energy Management Interface (EEMI) API guide: |
| https://www.xilinx.com/support/documentation/user_guides/ug1200-eemi-api.pdf |
