spi: Unify firmware node type checks

The few functions are using different approaches on how to check for
the type of firmware node. Unify them to use a modern way of it.

With that in place it becomes obvious that no need to have independent
conditionals when they are dependent and hence the code generation can
be improved a little bit (clang-18, x86_64):

  add/remove: 0/0 grow/shrink: 2/2 up/down: 16/-46 (-30)
  Total: Before=49801, After=49771, chg -0.06%

Meanwhile no functional changes intended.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20241208195635.1271656-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: andy-shev

drivers/spi/spi.c

@@ -410,24 +410,21 @@ static int spi_probe(struct device *dev)
 {
 	const struct spi_driver		*sdrv = to_spi_driver(dev->driver);
 	struct spi_device		*spi = to_spi_device(dev);
+	struct fwnode_handle		*fwnode = dev_fwnode(dev);
 	int ret;
 
 	ret = of_clk_set_defaults(dev->of_node, false);
 	if (ret)
 		return ret;
 
-	if (dev->of_node) {
+	if (is_of_node(fwnode)) {
 		spi->irq = of_irq_get(dev->of_node, 0);
 		if (spi->irq == -EPROBE_DEFER)
 			return dev_err_probe(dev, -EPROBE_DEFER, "Failed to get irq\n");
 		if (spi->irq < 0)
 			spi->irq = 0;
-	}
-
-	if (has_acpi_companion(dev) && spi->irq < 0) {
-		struct acpi_device *adev = to_acpi_device_node(dev->fwnode);
-
-		spi->irq = acpi_dev_gpio_irq_get(adev, 0);
+	} else if (is_acpi_device_node(fwnode) && spi->irq < 0) {
+		spi->irq = acpi_dev_gpio_irq_get(to_acpi_device_node(fwnode), 0);
 		if (spi->irq == -EPROBE_DEFER)
 			return -EPROBE_DEFER;
 		if (spi->irq < 0)
@@ -874,15 +871,18 @@ EXPORT_SYMBOL_GPL(spi_new_device);
  */
 void spi_unregister_device(struct spi_device *spi)
 {
+	struct fwnode_handle *fwnode;
+
 	if (!spi)
 		return;
 
-	if (spi->dev.of_node) {
-		of_node_clear_flag(spi->dev.of_node, OF_POPULATED);
-		of_node_put(spi->dev.of_node);
+	fwnode = dev_fwnode(&spi->dev);
+	if (is_of_node(fwnode)) {
+		of_node_clear_flag(to_of_node(fwnode), OF_POPULATED);
+		of_node_put(to_of_node(fwnode));
+	} else if (is_acpi_device_node(fwnode)) {
+		acpi_device_clear_enumerated(to_acpi_device_node(fwnode));
 	}
-	if (ACPI_COMPANION(&spi->dev))
-		acpi_device_clear_enumerated(ACPI_COMPANION(&spi->dev));
 	device_remove_software_node(&spi->dev);
 	device_del(&spi->dev);
 	spi_cleanup(spi);
@@ -1059,7 +1059,7 @@ static void spi_toggle_csgpiod(struct spi_device *spi, u8 idx, bool enable, bool
 	 * ambiguity. That's why we use enable, that takes SPI_CS_HIGH
 	 * into account.
 	 */
-	if (has_acpi_companion(&spi->dev))
+	if (is_acpi_device_node(dev_fwnode(&spi->dev)))
 		gpiod_set_value_cansleep(spi_get_csgpiod(spi, idx), !enable);
 	else
 		/* Polarity handled by GPIO library */
@@ -4841,7 +4841,7 @@ extern struct notifier_block spi_of_notifier;
 #if IS_ENABLED(CONFIG_ACPI)
 static int spi_acpi_controller_match(struct device *dev, const void *data)
 {
-	return ACPI_COMPANION(dev->parent) == data;
+	return device_match_acpi_dev(dev->parent, data);
 }
 
 struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_device *adev)