[PATCH v3 07/10] common: add initial barebox deep-probe support

[Sascha Hauer]

On Wed, Oct 21, 2020 at 01:58:10PM +0200, Marco Felsch wrote:
> The barebox 'deep probe' or 'probe on demand' mechanism is the answer of
> +
> +/**
> + * of_devices_ensure_probed_by_dev_id() - ensures that a devices are probed
> + *
> + * @np: the start point device_node handle
> + * @ids: the matching 'struct of_device_id' ids
> + *
> + * The function start searching the device tree from @np and populates and
> + * probes devices which matches @ids.
> + *
> + * Return: %0 on success
> + *	   %-ENODEV if either the device wasn't found, can't be populated,
> + *	     the driver is missing or the driver probe returns an error
> + */
> +int of_devices_ensure_probed_by_dev_id(struct device_node *np,
> +				       const struct of_device_id *ids)
> +{
> +	struct device_node *child;
> +
> +	if (of_match_node(ids, np))
> +		return of_device_ensure_probed(np);
> +
> +	for_each_child_of_node(np, child) {
> +		int ret;
> +
> +		ret = of_devices_ensure_probed_by_dev_id(child, ids);
> +		if (!ret)
> +			return 0;
> +	}

Ok, this needs fixing. After of_devices_ensure_probed_by_dev_id()
returns successfully you must continue the loop, otherwise only the
first matching devices on each level is probed.

Sascha


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