[LEDE-DEV] Ethernet link up/down mt7688 board not detected by hotplug

[Baptiste Clenet]

Additional information:
Board is down and ethernet unplugged.
Board is switched on, I wait for end of boot then I plug ethernet
cable, here; hotplug is call ACTION=ifup
Then I unplug, no hotplug call, then I plug, no hotplug call.
I don't understand why it is called only if I boot without ethernet

2016-07-19 15:35 GMT+02:00 Baptiste Clenet <bapclenet at gmail.com>:
> Hi,
>
> I added two scripts in hotplug /etc/htoplug.d/net and /iface to check
> when the interface eth0 is up or down or even link up/down.
> Each time I plug the cable, Kernel driver says:
> [ 1376.480000] rt305x-esw 10110000.esw: link changed 0x01
> and unplug:
> [ 1373.490000] rt305x-esw 10110000.esw: link changed 0x00
>
> Nevertheless, it seems that no ACTION is raised on hotplug so I can't
> detect if eth0 is link up or down.
> Thing is, I would like, every time I unplug the ethernet cable, that the
> interface is set down.
>
> The ethernet driver for this part is the irq handler:
> static irqreturn_t esw_interrupt(int irq, void *_esw)
> {
> struct rt305x_esw *esw = (struct rt305x_esw *) _esw;
> u32 status;
>
> status = esw_r32(esw, RT305X_ESW_REG_ISR);
> if (status & RT305X_ESW_PORT_ST_CHG) {
> u32 link = esw_r32(esw, RT305X_ESW_REG_POA);
> link >>= RT305X_ESW_POA_LINK_SHIFT;
> link &= RT305X_ESW_POA_LINK_MASK;
> dev_info(esw->dev, "link changed 0x%02X\n", link);
> }
> esw_w32(esw, status, RT305X_ESW_REG_ISR);
>
> return IRQ_HANDLED;
> }
>
> It does not seem to send a SIGNAL to kernel for a LINK UP/DOWN. Is
> that normal and how can I detect that ethernet is plug/unplug?
>
> Cheers,
>
> --
> Baptiste



-- 
Baptiste