linux-kernel - [PATCH] gpiolib: acpi: Fix gpio count with string references

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Message-Id: <20260129145944.3372777-1-alban.bedel@lht.dlh.de>
Date: Thu, 29 Jan 2026 15:59:44 +0100
From: Alban Bedel <alban.bedel@....dlh.de>
To: linux-gpio@...r.kernel.org
Cc: Mika Westerberg <westeri@...nel.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Linus Walleij <linusw@...nel.org>,
	Bartosz Golaszewski <brgl@...nel.org>,
	linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Alban Bedel <alban.bedel@....dlh.de>
Subject: [PATCH] gpiolib: acpi: Fix gpio count with string references

Since commit 9880702d123f2 ("ACPI: property: Support using strings in
reference properties") it is possible to use strings instead of local
references. This work fine with single GPIO but not with arrays as
acpi_gpio_package_count() didn't handle this case. Update it to handle
strings like local references to cover this case as well.

Signed-off-by: Alban Bedel <alban.bedel@....dlh.de>
---
 drivers/gpio/gpiolib-acpi-core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpiolib-acpi-core.c b/drivers/gpio/gpiolib-acpi-core.c
index 83dd227dbbecc..effc5ab6864b8 100644
--- a/drivers/gpio/gpiolib-acpi-core.c
+++ b/drivers/gpio/gpiolib-acpi-core.c
@@ -1346,6 +1346,7 @@ static int acpi_gpio_package_count(const union acpi_object *obj)
 	while (element < end) {
 		switch (element->type) {
 		case ACPI_TYPE_LOCAL_REFERENCE:
+		case ACPI_TYPE_STRING:
 			element += 3;
 			fallthrough;
 		case ACPI_TYPE_INTEGER:
-- 
2.39.5