Re: [PATCH v2] bootm: fit: support multiple configuration nodes

[Sascha Hauer <s.hauer@pengutronix.de>]

On Mon, Mar 27, 2017 at 08:06:47AM +0200, Oleksij Rempel wrote:
> From: Steffen Trumtrar <s.trumtrar@pengutronix.de>
> 
> Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
> ---
>  common/image-fit.c | 39 +++++++++++++++++++++++++++++++++++++--
>  1 file changed, 37 insertions(+), 2 deletions(-)
> 
> diff --git a/common/image-fit.c b/common/image-fit.c
> index 0536c49b1..cd2d7519a 100644
> --- a/common/image-fit.c
> +++ b/common/image-fit.c
> @@ -491,6 +491,37 @@ static int fit_config_verify_signature(struct fit_handle *handle, struct device_
>  	return ret;
>  }
>  
> +static int fit_find_compatible_unit(struct device_node *conf_node,
> +				    const char **unit)
> +{
> +	struct device_node *child = NULL;
> +	struct device_node *barebox_root;
> +	const char *machine;
> +	int ret;
> +
> +	barebox_root = of_get_root_node();
> +	if (!barebox_root)
> +		return -ENOSYS;

Fall back to default here for non of machines?

Sascha

> +
> +	ret = of_property_read_string(barebox_root, "compatible", &machine);
> +	if (ret)
> +		return -ENOENT;
> +
> +	for_each_child_of_node(conf_node, child) {
> +		if (of_device_is_compatible(child, machine)) {
> +			*unit = child->name;
> +			pr_info("matching unit '%s' found\n", *unit);
> +			return 0;
> +		}
> +	}
> +
> +	pr_info("No match found. Trying default.\n");
> +	if (of_property_read_string(conf_node, "default", unit) == 0)
> +		return 0;
> +
> +	return -ENOENT;
> +}
> +
>  static int fit_open_configuration(struct fit_handle *handle, const char *name)
>  {
>  	struct device_node *conf_node = NULL;
> @@ -503,8 +534,12 @@ static int fit_open_configuration(struct fit_handle *handle, const char *name)
>  
>  	if (name) {
>  		unit = name;
> -	} else if (of_property_read_string(conf_node, "default", &unit)) {
> -		unit = "conf@1";
> +	} else {
> +		ret = fit_find_compatible_unit(conf_node, &unit);
> +		if (ret) {
> +			pr_info("Couldn't get a valid configuration. Aborting.\n");
> +			return ret;
> +		}
>  	}
>  
>  	conf_node = of_get_child_by_name(conf_node, unit);
> -- 
> 2.11.0
> 
> 
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