修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

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What:        /sys/kernel/dma_heap/total_pools_kb
Date:        Feb 2021
KernelVersion:    5.10
Contact:    Hridya Valsaraju <hridya@google.com>,
Description:
        The total_pools_kb file is read-only and specifies how much
        memory in Kb is allocated to DMA-BUF heap pools.