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path: root/src/soc/mediatek/mt8188/spm.c
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2022-08-31soc/mediatek/mt8188: Add SPM loader and initialize SPM in RAM stageRex-BC Chen
Add support for loading SPM firmware from CBFS to SPM SRAM. SPM needs its own firmware to enable SPM suspend/resume function which turns off several resources such as DRAM/mainpll/26M clk when linux system suspend. SPM is an essential component on MediaTek SoC, so we initialize PPM in soc_init(). For MT8188, SPM will handshake with DPM to do initialization, so we need to call spm_init() after dpm_init(). This SPM flow adds 33ms to the boot time. firmware log: mtk_init_mcu: Loaded (and reset) spm_firmware.bin in 25 msecs SPM: spm_init done in 33 msecs, spm pc = 0x400 TEST=spm pc is 0x400 which is in idle state. BUG=b:236331724 Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com> Change-Id: I1a1f49383e0ceadc259a18272fc1c277b65406ae Reviewed-on: https://review.coreboot.org/c/coreboot/+/66973 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Yu-Ping Wu <yupingso@google.com>