[RFC 5/9] of: Add helper for printing an of_phandle_args structure

Grant Likely
2013-10-15T20:39:44Z

It is sometimes useful for debug to get the contents of an
of_phandle_args structure out into the kernel log.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
---
drivers/of/base.c | 9 +++++++++
drivers/of/irq.c | 6 +++---
include/linux/of.h | 1 +
3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 3ae106d..021db96 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1185,6 +1185,15 @@ int of_property_count_strings(struct device_node *np, const char *propname)
}
EXPORT_SYMBOL_GPL(of_property_count_strings);

+void of_print_phandle_args(const char *msg, const struct of_phandle_args *args)
+{
+ int i;
+ printk("%s %s", msg, of_node_full_name(args->np));
+ for (i = 0; i < args->args_count; i++)
+ printk(i ? ",%08x" : ":%08x", args->args[i]);
+ printk("\n");
+}
+
static int __of_parse_phandle_with_args(const struct device_node *np,
const char *list_name,
const char *cells_name,
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 0ed5ed4..ddea945 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -101,9 +101,9 @@ int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq)
u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0;
int imaplen, match, i;

- pr_debug("of_irq_parse_raw: par=%s,intspec=[0x%08x 0x%08x...],ointsize=%d\n",
- of_node_full_name(out_irq->np), out_irq->args[0], out_irq->args[1],
- out_irq->args_count);
+#ifdef DEBUG
+ of_print_phandle_args("of_irq_parse_raw: ", out_irq);
+#endif

ipar = of_node_get(out_irq->np);

diff --git a/include/linux/of.h b/include/linux/of.h
index f95aee3..374e035 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -275,6 +275,7 @@ extern int of_n_size_cells(struct device_node *np);
extern const struct of_device_id *of_match_node(
const struct of_device_id *matches, const struct device_node *node);
extern int of_modalias_node(struct device_node *node, char *modalias, int len);
+extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args);
extern struct device_node *of_parse_phandle(const struct device_node *np,
const char *phandle_name,
int index);
--
1.8.1.2