The function at91udc_probe in the file drivers/usb/gadget/at91_udc.c
contains the following code:
udc->iclk = clk_get(dev, "udc_clk");
udc->fclk = clk_get(dev, "udpck");
if (IS_ERR(udc->iclk) || IS_ERR(udc->fclk)) {
DBG("clocks missing\n");
retval = -ENODEV;
/* NOTE: we "know" here that refcounts on these are NOPs */
goto fail0b;
}
Why is it known here that refcounts are NOPs. When does this property
cease to hold? clk_put is present in the corresponding remove function.
thanks,
julia
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