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-rw-r--r--scripts/dtc/fdtget.c119
1 files changed, 69 insertions, 50 deletions
diff --git a/scripts/dtc/fdtget.c b/scripts/dtc/fdtget.c
index c2fbab2..6cc5242 100644
--- a/scripts/dtc/fdtget.c
+++ b/scripts/dtc/fdtget.c
@@ -54,6 +54,37 @@ static void report_error(const char *where, int err)
}
/**
+ * Shows a list of cells in the requested format
+ *
+ * @param disp Display information / options
+ * @param data Data to display
+ * @param len Maximum length of buffer
+ * @param size Data size to use for display (e.g. 4 for 32-bit)
+ * @return 0 if ok, -1 on error
+ */
+static int show_cell_list(struct display_info *disp, const char *data, int len,
+ int size)
+{
+ const uint8_t *p = (const uint8_t *)data;
+ char fmt[3];
+ int value;
+ int i;
+
+ fmt[0] = '%';
+ fmt[1] = disp->type ? disp->type : 'd';
+ fmt[2] = '\0';
+ for (i = 0; i < len; i += size, p += size) {
+ if (i)
+ printf(" ");
+ value = size == 4 ? fdt32_to_cpu(*(const fdt32_t *)p) :
+ size == 2 ? (*p << 8) | p[1] : *p;
+ printf(fmt, value);
+ }
+
+ return 0;
+}
+
+/**
* Displays data of a given length according to selected options
*
* If a specific data type is provided in disp, then this is used. Otherwise
@@ -66,12 +97,9 @@ static void report_error(const char *where, int err)
*/
static int show_data(struct display_info *disp, const char *data, int len)
{
- int i, size;
- const uint8_t *p = (const uint8_t *)data;
+ int size;
const char *s;
- int value;
int is_string;
- char fmt[3];
/* no data, don't print */
if (len == 0)
@@ -99,17 +127,8 @@ static int show_data(struct display_info *disp, const char *data, int len)
"selected data size\n");
return -1;
}
- fmt[0] = '%';
- fmt[1] = disp->type ? disp->type : 'd';
- fmt[2] = '\0';
- for (i = 0; i < len; i += size, p += size) {
- if (i)
- printf(" ");
- value = size == 4 ? fdt32_to_cpu(*(const uint32_t *)p) :
- size == 2 ? (*p << 8) | p[1] : *p;
- printf(fmt, value);
- }
- return 0;
+
+ return show_cell_list(disp, data, len, size);
}
/**
@@ -245,7 +264,7 @@ static int show_data_for_item(const void *blob, struct display_info *disp,
* @param filename Filename of blob file
* @param arg List of arguments to process
* @param arg_count Number of arguments
- * @param return 0 if ok, -ve on error
+ * @return 0 if ok, -ve on error
*/
static int do_fdtget(struct display_info *disp, const char *filename,
char **arg, int arg_count, int args_per_step)
@@ -266,44 +285,50 @@ static int do_fdtget(struct display_info *disp, const char *filename,
continue;
} else {
report_error(arg[i], node);
+ free(blob);
return -1;
}
}
prop = args_per_step == 1 ? NULL : arg[i + 1];
- if (show_data_for_item(blob, disp, node, prop))
+ if (show_data_for_item(blob, disp, node, prop)) {
+ free(blob);
return -1;
+ }
}
+
+ free(blob);
+
return 0;
}
-static const char *usage_msg =
- "fdtget - read values from device tree\n"
- "\n"
- "Each value is printed on a new line.\n\n"
- "Usage:\n"
+/* Usage related data. */
+static const char usage_synopsis[] =
+ "read values from device tree\n"
" fdtget <options> <dt file> [<node> <property>]...\n"
" fdtget -p <options> <dt file> [<node> ]...\n"
- "Options:\n"
- "\t-t <type>\tType of data\n"
- "\t-p\t\tList properties for each node\n"
- "\t-l\t\tList subnodes for each node\n"
- "\t-d\t\tDefault value to display when the property is "
- "missing\n"
- "\t-h\t\tPrint this help\n\n"
+ "\n"
+ "Each value is printed on a new line.\n"
USAGE_TYPE_MSG;
-
-static void usage(const char *msg)
-{
- if (msg)
- fprintf(stderr, "Error: %s\n\n", msg);
-
- fprintf(stderr, "%s", usage_msg);
- exit(2);
-}
+static const char usage_short_opts[] = "t:pld:" USAGE_COMMON_SHORT_OPTS;
+static struct option const usage_long_opts[] = {
+ {"type", a_argument, NULL, 't'},
+ {"properties", no_argument, NULL, 'p'},
+ {"list", no_argument, NULL, 'l'},
+ {"default", a_argument, NULL, 'd'},
+ USAGE_COMMON_LONG_OPTS,
+};
+static const char * const usage_opts_help[] = {
+ "Type of data",
+ "List properties for each node",
+ "List subnodes for each node",
+ "Default value to display when the property is missing",
+ USAGE_COMMON_OPTS_HELP
+};
int main(int argc, char *argv[])
{
+ int opt;
char *filename = NULL;
struct display_info disp;
int args_per_step = 2;
@@ -312,20 +337,14 @@ int main(int argc, char *argv[])
memset(&disp, '\0', sizeof(disp));
disp.size = -1;
disp.mode = MODE_SHOW_VALUE;
- for (;;) {
- int c = getopt(argc, argv, "d:hlpt:");
- if (c == -1)
- break;
-
- switch (c) {
- case 'h':
- case '?':
- usage(NULL);
+ while ((opt = util_getopt_long()) != EOF) {
+ switch (opt) {
+ case_USAGE_COMMON_FLAGS
case 't':
if (utilfdt_decode_type(optarg, &disp.type,
&disp.size))
- usage("Invalid type string");
+ usage("invalid type string");
break;
case 'p':
@@ -347,7 +366,7 @@ int main(int argc, char *argv[])
if (optind < argc)
filename = argv[optind++];
if (!filename)
- usage("Missing filename");
+ usage("missing filename");
argv += optind;
argc -= optind;
@@ -358,7 +377,7 @@ int main(int argc, char *argv[])
/* Check for node, property arguments */
if (args_per_step == 2 && (argc % 2))
- usage("Must have an even number of arguments");
+ usage("must have an even number of arguments");
if (do_fdtget(&disp, filename, argv, argc, args_per_step))
return 1;