[PATCH 2/2] Input: drv260x: Map ACPI enable GPIO

[Maurizio Casciano]

Some ACPI DRV2604 devices describe the enable line as the first GPIO
resource in _CRS but provide no _DSD mapping for its function. The GPIO
consumer lookup then returns no descriptor, leaving Yoga Book haptics
unable to complete calibration.

Add a managed ACPI GPIO mapping before requesting the optional enable
line so these devices can power their haptic path.

Signed-off-by: Maurizio Casciano <mauriziocasciano7@xxxxxxxxx>
Assisted-by: Codex:gpt-5.6-sol sparse
---
 drivers/input/misc/drv260x.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/input/misc/drv260x.c b/drivers/input/misc/drv260x.c
index c4fbb10b254e..b6243ce8157d 100644
--- a/drivers/input/misc/drv260x.c
+++ b/drivers/input/misc/drv260x.c
@@ -434,6 +434,13 @@ static const struct regmap_config drv260x_regmap_config = {
 	.cache_type = REGCACHE_NONE,
 };
 
+/* ACPI DRV2604 devices describe enable as their first GPIO resource. */
+static const struct acpi_gpio_params drv260x_enable_gpio = { 0, 0, false };
+static const struct acpi_gpio_mapping drv260x_acpi_gpios[] = {
+	{ "enable-gpios", &drv260x_enable_gpio, 1 },
+	{ }
+};
+
 static void drv260x_power_off(void *data)
 {
 	struct drv260x_data *haptics = data;
@@ -448,6 +455,14 @@ static int drv260x_probe(struct i2c_client *client)
 	u32 voltage;
 	int error;
 
+	if (has_acpi_companion(dev)) {
+		error = devm_acpi_dev_add_driver_gpios(dev,
+						       drv260x_acpi_gpios);
+		if (error)
+			return dev_err_probe(dev, error,
+					     "Failed to add ACPI GPIO mapping\n");
+	}
+
 	haptics = devm_kzalloc(dev, sizeof(*haptics), GFP_KERNEL);
 	if (!haptics)
 		return -ENOMEM;
-- 
2.53.0