Function rt_phy_find_by_mask

components/drivers/phy/phy.c:426–459

}

struct rt_phy_device *rt_phy_find_by_mask(struct mii_bus *bus, unsigned int phy_mask)
{
    struct rt_phy_device *phy;
    unsigned int mask = phy_mask;
    unsigned int addr;
    if (bus->reset)
    {
        bus->reset(bus);

        rt_thread_mdelay(15);
    }

    while (mask)
    {
        /*
         *Whichever bit of the mask is the 1,
         *which bit is the addr as the array subscript to search
         *such as mask = 1110 ,this loop will search for subscript
         *1,2,3,if the array subscript is not null then return it,
         *if the array subscript is null then continue to search
        */
        addr = __rt_ffs(mask) - 1;

        if (bus->phymap[addr])
            return bus->phymap[addr];

        mask &= ~(1U << addr);
    }
    /*ifcan't find phy device, create a new phy device*/
    phy = rt_phydev_create_by_mask(bus, phy_mask);

    return phy;

}

/**
 * @brief get phy device by given mii bus, node and address