数据结构设计

struct aic_gpai_data {
    int             num_bits;
    const struct iio_chan_spec  *channels;
    int             num_channels;
    u32             fifo_depth[AIC_GPAI_MAX_CH];
};

struct aic_gpai_ch {
    u32 id;
    bool available;
    enum aic_gpai_mode mode;
    u16 latest_data;
    u16 fifo_thd;
    u32 smp_period;

    bool hla_enable; // high-level alarm
    u16 hla_thd;
    u16 hla_rm_thd;
    bool lla_enable; // low-level alarm
    u16 lla_thd;
    u16 lla_rm_thd;

    struct completion complete;
};

struct aic_gpai_dev {
    struct platform_device      *pdev;
    void __iomem            *regs;
    struct clk          *clk;
    struct reset_control        *rst;
    u32             irq;
    u32             pclk_rate;

    struct aic_gpai_ch      chan[AIC_GPAI_MAX_CH];
    const struct aic_gpai_data  *data;
};