diff mbox series

[v2,1/5] dm: gpio: Fix gpio_get_list_count failing with livetree

Message ID 20210305201225.3753841-2-sean.anderson@seco.com
State Superseded
Delegated to: Tom Rini
Headers show
Series sysinfo: Add gpio sysinfo driver | expand

Commit Message

Sean Anderson March 5, 2021, 8:12 p.m. UTC 
of_parse_phandle_with_args (called by dev_read_phandle_with_args) does not
support getting the length of a phandle list by using the index -1.
Instead, use dev_count_phandle_with_args which supports exactly this
use-case.

Fixes: 8558217153 ("gpio: Convert to use APIs which support live DT")

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---

Changes in v2:
- Change Fixes tag to the most recent commit touching these lines

 drivers/gpio/gpio-uclass.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c
index 8dc647dc9f..8de6fe58a4 100644
--- a/drivers/gpio/gpio-uclass.c
+++ b/drivers/gpio/gpio-uclass.c
@@ -1214,8 +1214,8 @@  int gpio_get_list_count(struct udevice *dev, const char *list_name)
 {
 	int ret;
 
-	ret = dev_read_phandle_with_args(dev, list_name, "#gpio-cells", 0, -1,
-					 NULL);
+	ret = dev_count_phandle_with_args(dev, list_name, "#gpio-cells",
+					  -ENOENT);
 	if (ret) {
 		debug("%s: Node '%s', property '%s', GPIO count failed: %d\n",
 		      __func__, dev->name, list_name, ret);