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gpiolib: use of_node_name if line-name is missing

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Until v7.0, GPIO hogs inherited the DT node name when no line-name
property was specified. This was implemented as a fallback in
of_parse_own_gpio().

Commit d1d564ec49 ("gpio: move hogs into GPIO core") moved hog parsing
into the GPIO core and removed this fallback.

Consequently, GPIO hogs without a line-name property are now displayed
with a ? in /sys/kernel/debug/gpio. Restore the old fallback.

Fixes: d1d564ec49 ("gpio: move hogs into GPIO core")
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20260917153712.134367-1-linux@fw-web.de
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
This commit is contained in:
Frank Wunderlich 2026-09-17 17:37:11 +02:00 committed by Bartosz Golaszewski
parent 02af7eac17
commit d54a489c8c
1 changed files with 7 additions and 0 deletions
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7
drivers/gpio/gpiolib.c
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@ -1029,6 +1029,13 @@ int gpiochip_add_hog(struct gpio_chip *gc, struct fwnode_handle *fwnode)
ret = of_gpiochip_get_lflags(gc, &gpiospec, &lflags);
if (ret)
return ret;
/*
* If no line-name property is present, fall back to the OF
* node name as in the previous implementation.
*/
if (!name)
name = to_of_node(fwnode)->name;
} else {
/*
* GPIO_ACTIVE_LOW is currently the only lookup flag