[U-Boot] pre_probe under struct driver
Keerthy
j-keerthy at ti.com
Tue Jun 4 13:01:50 UTC 2019
Hi Simon/Tom,
I am looking at the device_probe function in drivers/core/device.c
ret = uclass_pre_probe_device(dev);
if (ret)
goto fail;
if (dev->parent && dev->parent->driver->child_pre_probe) {
ret = dev->parent->driver->child_pre_probe(dev);
if (ret)
goto fail;
}
if (drv->ofdata_to_platdata && dev_has_of_node(dev)) {
ret = drv->ofdata_to_platdata(dev);
if (ret)
goto fail;
}
/* Process 'assigned-{clocks/clock-parents/clock-rates}'
properties */
ret = clk_set_defaults(dev);
In case of a device like MPU we would like setup voltage before setting
the clocks and i was looking if we can have a pre_probe for a driver
to do things before driver gets probed. Neither uclass_pre_probe_device
nor dev->parent->driver->child_pre_probe benefit me in this case.
Does my situation warrant adding a new hook to struct driver? Or are
there instances of such handling already in u-boot.
Thanks in Advance,
Keerthy
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