Re: [PATCH] commands: of_dump: implement -p for printing properties only

[Sascha Hauer <sha@pengutronix.de>]

On Thu, May 27, 2021 at 02:44:06PM +0200, Ahmad Fatoum wrote:
> Some boards rewrite root node properties like compatible and
> serial-number. Checking them can be annoying, because the properties
> have usually long scrolled by, by the time the device tree was
> completely dumped. Add a -p option to print only properties.
> 
> -p -n (print only node names AND only properties) is interpreted
> to cancel each other out, so the whole device tree is dumped normally.
> 
> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
> ---
>  commands/of_dump.c | 14 ++++++++++----
>  drivers/of/base.c  |  8 ++++++++
>  include/of.h       |  1 +
>  3 files changed, 19 insertions(+), 4 deletions(-)

Nice. This annoyed me as well sometimes. Applied, thanks

Sascha

> 
> diff --git a/commands/of_dump.c b/commands/of_dump.c
> index 6792af3afc31..2089c07ef79b 100644
> --- a/commands/of_dump.c
> +++ b/commands/of_dump.c
> @@ -36,9 +36,9 @@ static int do_of_dump(int argc, char *argv[])
>  	char *dtbfile = NULL;
>  	size_t size;
>  	const char *nodename;
> -	int names_only = 0;
> +	int names_only = 0, properties_only = 0;
>  
> -	while ((opt = getopt(argc, argv, "Ff:n")) > 0) {
> +	while ((opt = getopt(argc, argv, "Ff:np")) > 0) {
>  		switch (opt) {
>  		case 'f':
>  			dtbfile = optarg;
> @@ -49,6 +49,9 @@ static int do_of_dump(int argc, char *argv[])
>  		case 'n':
>  			names_only = 1;
>  			break;
> +		case 'p':
> +			properties_only = 1;
> +			break;
>  		default:
>  			return COMMAND_ERROR_USAGE;
>  		}
> @@ -111,8 +114,10 @@ static int do_of_dump(int argc, char *argv[])
>  		goto out;
>  	}
>  
> -	if (names_only)
> +	if (names_only && !properties_only)
>  		of_print_nodenames(node);
> +	else if (properties_only && !names_only)
> +		of_print_properties(node);
>  	else
>  		of_print_nodes(node, 0);
>  
> @@ -128,12 +133,13 @@ BAREBOX_CMD_HELP_TEXT("Options:")
>  BAREBOX_CMD_HELP_OPT  ("-f dtb",  "work on dtb instead of internal devicetree")
>  BAREBOX_CMD_HELP_OPT  ("-F",  "return fixed devicetree")
>  BAREBOX_CMD_HELP_OPT  ("-n",  "Print node names only, no properties")
> +BAREBOX_CMD_HELP_OPT  ("-p",  "Print properties only, no child nodes")
>  BAREBOX_CMD_HELP_END
>  
>  BAREBOX_CMD_START(of_dump)
>  	.cmd		= do_of_dump,
>  	BAREBOX_CMD_DESC("dump devicetree nodes")
> -	BAREBOX_CMD_OPTS("[-fFn] [NODE]")
> +	BAREBOX_CMD_OPTS("[-fFnp] [NODE]")
>  	BAREBOX_CMD_GROUP(CMD_GRP_MISC)
>  	BAREBOX_CMD_COMPLETE(devicetree_file_complete)
>  	BAREBOX_CMD_HELP(cmd_of_dump_help)
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index 6fe02649ee53..e103eed90af1 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -2002,6 +2002,14 @@ static void __of_print_property(struct property *p, int indent)
>  	printf(";\n");
>  }
>  
> +void of_print_properties(struct device_node *node)
> +{
> +	struct property *prop;
> +
> +	list_for_each_entry(prop, &node->properties, list)
> +		__of_print_property(prop, 0);
> +}
> +
>  static int __of_print_parents(struct device_node *node)
>  {
>  	int indent, i;
> diff --git a/include/of.h b/include/of.h
> index 645f429bdeed..55e6bff8689e 100644
> --- a/include/of.h
> +++ b/include/of.h
> @@ -105,6 +105,7 @@ void of_print_property(const void *data, int len);
>  void of_print_cmdline(struct device_node *root);
>  
>  void of_print_nodes(struct device_node *node, int indent);
> +void of_print_properties(struct device_node *node);
>  void of_diff(struct device_node *a, struct device_node *b, int indent);
>  int of_probe(void);
>  int of_parse_dtb(struct fdt_header *fdt);
> -- 
> 2.29.2
> 
> 
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