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Diffstat (limited to 'Documentation/xilinx')
| -rw-r--r-- | Documentation/xilinx/eemi.txt | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/Documentation/xilinx/eemi.txt b/Documentation/xilinx/eemi.txt deleted file mode 100644 index 5f39b4ffdcd4..000000000000 --- a/Documentation/xilinx/eemi.txt +++ /dev/null @@ -1,67 +0,0 @@ ---------------------------------------------------------------------- -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. - -EEMI ops is a structure containing all eemi APIs supported by Zynq MPSoC. -The zynqmp-firmware driver maintain all EEMI APIs in zynqmp_eemi_ops -structure. Any driver who want to communicate with PMC using EEMI APIs -can call zynqmp_pm_get_eemi_ops(). - -Example of EEMI ops: - - /* zynqmp-firmware driver maintain all EEMI APIs */ - struct zynqmp_eemi_ops { - int (*get_api_version)(u32 *version); - int (*query_data)(struct zynqmp_pm_query_data qdata, u32 *out); - }; - - static const struct zynqmp_eemi_ops eemi_ops = { - .get_api_version = zynqmp_pm_get_api_version, - .query_data = zynqmp_pm_query_data, - }; - -Example of EEMI ops usage: - - static const struct zynqmp_eemi_ops *eemi_ops; - u32 ret_payload[PAYLOAD_ARG_CNT]; - int ret; - - eemi_ops = zynqmp_pm_get_eemi_ops(); - if (IS_ERR(eemi_ops)) - return PTR_ERR(eemi_ops); - - ret = eemi_ops->query_data(qdata, ret_payload); - -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 |
