[PATCH 13/37] of: Add initrd helper

[Alexander Aring]

Hi Sascha,

On Mon, Mar 04, 2013 at 10:53:16AM +0100, Sascha Hauer wrote:
> Add a helper to set the initrd properties in the unflattened tree.
> 
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> ---
>  drivers/of/base.c |   39 +++++++++++++++++++++++++++++++++++++++
>  include/of.h      |    3 +++
>  2 files changed, 42 insertions(+)
> 
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index 721db29..4dbe11e 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -1201,3 +1201,42 @@ int of_device_is_stdout_path(struct device_d *dev)
>  
>  	return 0;
>  }
> +
> +/**
> + * of_add_initrd - add initrd properties to the devicetree
> + * @root - the root node of the tree
> + * @start - physical start address of the initrd image
> + * @end - physical end address of the initrd image
> + *
> + * Add initrd properties to the devicetree, or, if end is 0,
> + * delete them.
> + */
> +int of_add_initrd(struct device_node *root, resource_size_t start,
> +		resource_size_t end)
> +{
> +	struct device_node *chosen;
> +	__be32 buf[2];
> +
> +	chosen = of_find_node_by_path(root, "/chosen");
> +	if (!chosen)
> +		return -EINVAL;
> +
> +	if (end) {

Perhaps it's better here to check on (start && end) instead of end
address only.

Similar in "[PATCH 35/37] ARM bootm: Switch initrd support to unflattened
tree" at "of_add_reserve_entry(initrd_start, initrd_end);".

Regards
Alex