[PATCH RFC net-next v5 10/10] net: gianfar: Use device_get_child_node_count_named()

Matti Vaittinen
2025-03-03T11:34:58Z

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We can avoid open-coding the loop construct which counts firmware child
nodes with a specific name by using the newly added
device_get_child_node_count_named().

The gianfar driver has such open-coded loop. Replace it with the
device_get_child_node_count_named().

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
---
It's fair to tell the pros and cons of this patch.
The simplification is there, but it's not a big one. It comes with a cost
of getting the property.h included in this driver which currently uses
exclusively the of_* APIs.

NOTE: This patch depends on the patch:
[2/10] "property: Add functions to count named child nodes"

Compile-tested only!
---
drivers/net/ethernet/freescale/gianfar.c | 17 ++++-------------
1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index 435138f4699d..dfe012a5bc0a 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -97,6 +97,7 @@
#include <linux/phy_fixed.h>
#include <linux/of.h>
#include <linux/of_net.h>
+#include <linux/property.h>

#include "gianfar.h"

@@ -571,18 +572,6 @@ static int gfar_parse_group(struct device_node *np,
return 0;
}

-static int gfar_of_group_count(struct device_node *np)
-{
- struct device_node *child;
- int num = 0;
-
- for_each_available_child_of_node(np, child)
- if (of_node_name_eq(child, "queue-group"))
- num++;
-
- return num;
-}
-
/* Reads the controller's registers to determine what interface
* connects it to the PHY.
*/
@@ -654,8 +643,10 @@ static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
num_rx_qs = 1;
} else { /* MQ_MG_MODE */
/* get the actual number of supported groups */
- unsigned int num_grps = gfar_of_group_count(np);
+ unsigned int num_grps;

+ num_grps = device_get_child_node_count_named(&ofdev->dev,
+ "queue-group");
if (num_grps == 0 || num_grps > MAXGROUPS) {
dev_err(&ofdev->dev, "Invalid # of int groups(%d)\n",
num_grps);
--
2.48.1

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