Merge branch 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c updates from Wolfram Sang:
 "New stuff from the I2C world:

   - in the core, getting irqs from ACPI is now similar to OF

   - new driver for MediaTek MT7621/7628/7688 SoCs

   - bcm2835, i801, and tegra drivers got some more attention

   - GPIO API cleanups

   - cleanups in the core headers

   - lots of usual driver updates"

* 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (74 commits)
  i2c: mt7621: Fix platform_no_drv_owner.cocci warnings
  i2c: cpm: remove casting dma_alloc
  dt-bindings: i2c: sun6i-p2wi: Fix the binding example
  dt-bindings: i2c: mv64xxx: Fix the example compatible
  i2c: i801: Documentation update
  i2c: i801: Add support for Intel Tiger Lake
  i2c: i801: Fix PCI ID sorting
  dt-bindings: i2c-stm32: document optional dmas
  i2c: i2c-stm32f7: Add I2C_SMBUS_I2C_BLOCK_DATA support
  i2c: core: Tidy up handling of init_irq
  i2c: core: Move ACPI gpio IRQ handling into i2c_acpi_get_irq
  i2c: core: Move ACPI IRQ handling to probe time
  i2c: acpi: Factor out getting the IRQ from ACPI
  i2c: acpi: Use available IRQ helper functions
  i2c: core: Allow whole core to use i2c_dev_irq_from_resources
  eeprom: at24: modify a comment referring to platform data
  dt-bindings: i2c: omap: Add new compatible for J721E SoCs
  dt-bindings: i2c: mv64xxx: Add YAML schemas
  dt-bindings: i2c: sun6i-p2wi: Add YAML schemas
  i2c: mt7621: Add MediaTek MT7621/7628/7688 I2C driver
  ...

1 files changed, 41 insertions, 17 deletions

diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index 428a82c3a35f..4dbbc9a35f65 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -132,13 +132,52 @@ static int i2c_acpi_do_lookup(struct acpi_device *adev,
 	return 0;
 }
 
+static int i2c_acpi_add_resource(struct acpi_resource *ares, void *data)
+{
+	int *irq = data;
+	struct resource r;
+
+	if (*irq <= 0 && acpi_dev_resource_interrupt(ares, 0, &r))
+		*irq = i2c_dev_irq_from_resources(&r, 1);
+
+	return 1; /* No need to add resource to the list */
+}
+
+/**
+ * i2c_acpi_get_irq - get device IRQ number from ACPI
+ * @client: Pointer to the I2C client device
+ *
+ * Find the IRQ number used by a specific client device.
+ *
+ * Return: The IRQ number or an error code.
+ */
+int i2c_acpi_get_irq(struct i2c_client *client)
+{
+	struct acpi_device *adev = ACPI_COMPANION(&client->dev);
+	struct list_head resource_list;
+	int irq = -ENOENT;
+	int ret;
+
+	INIT_LIST_HEAD(&resource_list);
+
+	ret = acpi_dev_get_resources(adev, &resource_list,
+				     i2c_acpi_add_resource, &irq);
+	if (ret < 0)
+		return ret;
+
+	acpi_dev_free_resource_list(&resource_list);
+
+	if (irq == -ENOENT)
+		irq = acpi_dev_gpio_irq_get(adev, 0);
+
+	return irq;
+}
+
 static int i2c_acpi_get_info(struct acpi_device *adev,
 			     struct i2c_board_info *info,
 			     struct i2c_adapter *adapter,
 			     acpi_handle *adapter_handle)
 {
-	struct list_head resource_list;
-	struct resource_entry *entry;
 	struct i2c_acpi_lookup lookup;
 	int ret;
 
@@ -172,21 +211,6 @@ static int i2c_acpi_get_info(struct acpi_device *adev,
 	if (adapter_handle)
 		*adapter_handle = lookup.adapter_handle;
 
-	/* Then fill IRQ number if any */
-	INIT_LIST_HEAD(&resource_list);
-	ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
-	if (ret < 0)
-		return -EINVAL;
-
-	resource_list_for_each_entry(entry, &resource_list) {
-		if (resource_type(entry->res) == IORESOURCE_IRQ) {
-			info->irq = entry->res->start;
-			break;
-		}
-	}
-
-	acpi_dev_free_resource_list(&resource_list);
-
 	acpi_set_modalias(adev, dev_name(&adev->dev), info->type,
 			  sizeof(info->type));