[PATCH 09/12] gpiolib: acpi: Remove unused static address space emulation from core

[Marco Scardovi (scardracs)]

Assisted-by: Antigravity:gemini-3-flash
Signed-off-by: Marco Scardovi <mscardovi95@xxxxxxxxx>
---
 drivers/gpio/gpiolib-acpi-core.c | 120 -------------------------------
 1 file changed, 120 deletions(-)

diff --git a/drivers/gpio/gpiolib-acpi-core.c b/drivers/gpio/gpiolib-acpi-core.c
index 4802d4948f89..b8976a0c798e 100644
--- a/drivers/gpio/gpiolib-acpi-core.c
+++ b/drivers/gpio/gpiolib-acpi-core.c
@@ -1049,126 +1049,6 @@ int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *con_id,
 }
 EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_wake_get_by);
 
-static acpi_status
-acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
-			    u32 bits, u64 *value, void *handler_context,
-			    void *region_context)
-{
-	struct acpi_gpio_chip *achip = region_context;
-	struct gpio_chip *chip = achip->chip;
-	struct acpi_resource_gpio *agpio;
-	struct acpi_resource *ares;
-	u16 pin_index = address;
-	acpi_status status;
-	int length;
-	int i;
-
-	status = acpi_buffer_to_resource(achip->conn_info.connection,
-					 achip->conn_info.length, &ares);
-	if (ACPI_FAILURE(status))
-		return status;
-
-	if (WARN_ON(ares->type != ACPI_RESOURCE_TYPE_GPIO)) {
-		ACPI_FREE(ares);
-		return AE_BAD_PARAMETER;
-	}
-
-	agpio = &ares->data.gpio;
-
-	if (WARN_ON(agpio->io_restriction == ACPI_IO_RESTRICT_INPUT &&
-	    function == ACPI_WRITE)) {
-		ACPI_FREE(ares);
-		return AE_BAD_PARAMETER;
-	}
-
-	if (pin_index >= agpio->pin_table_length) {
-		ACPI_FREE(ares);
-		return AE_BAD_PARAMETER;
-	}
-
-	length = min(agpio->pin_table_length, pin_index + bits);
-	for (i = pin_index; i < length; ++i) {
-		unsigned int pin = agpio->pin_table[i];
-		struct acpi_gpio_connection *conn;
-		struct gpio_desc *desc;
-		u16 word, shift;
-		bool found;
-
-		mutex_lock(&achip->conn_lock);
-
-		found = false;
-		list_for_each_entry(conn, &achip->conns, node) {
-			if (conn->pin == pin) {
-				found = true;
-				desc = conn->desc;
-				break;
-			}
-		}
-
-		/*
-		 * The same GPIO can be shared between operation region and
-		 * event but only if the access here is ACPI_READ. In that
-		 * case we "borrow" the event GPIO instead.
-		 */
-		if (!found && agpio->shareable == ACPI_SHARED &&
-		     function == ACPI_READ) {
-			struct acpi_gpio_event *event;
-
-			list_for_each_entry(event, &achip->events, node) {
-				if (event->pin == pin) {
-					desc = event->desc;
-					found = true;
-					break;
-				}
-			}
-		}
-
-		if (!found) {
-			desc = acpi_request_own_gpiod(chip, agpio, i, "ACPI:OpRegion");
-			if (IS_ERR(desc)) {
-				mutex_unlock(&achip->conn_lock);
-				status = AE_ERROR;
-				goto out;
-			}
-
-			conn = kzalloc_obj(*conn);
-			if (!conn) {
-				gpiochip_free_own_desc(desc);
-				mutex_unlock(&achip->conn_lock);
-				status = AE_NO_MEMORY;
-				goto out;
-			}
-
-			conn->pin = pin;
-			conn->desc = desc;
-			list_add_tail(&conn->node, &achip->conns);
-		}
-
-		mutex_unlock(&achip->conn_lock);
-
-		/*
-		 * For the cases when OperationRegion() consists of more than
-		 * 64 bits calculate the word and bit shift to use that one to
-		 * access the value.
-		 */
-		word = i / 64;
-		shift = i % 64;
-
-		if (function == ACPI_WRITE) {
-			gpiod_set_raw_value_cansleep(desc, value[word] & BIT_ULL(shift));
-		} else {
-			if (gpiod_get_raw_value_cansleep(desc))
-				value[word] |= BIT_ULL(shift);
-			else
-				value[word] &= ~BIT_ULL(shift);
-		}
-	}
-
-out:
-	ACPI_FREE(ares);
-	return status;
-}
-
 
 void acpi_gpiochip_add(struct gpio_chip *chip)
 {
-- 
2.54.0