[PATCH v2 4/9] iio: backend adi-axi-dac: add registering of child fdt node

[Angelo Dureghello]

From: Angelo Dureghello <adureghello@xxxxxxxxxxxx>

Change to obtain the fdt use case as reported in the
adi,ad3552r.yaml file in this patchset, with the DAC device that
is actually using the backend set as a child node of the backend.

To obtain this, registering all the child fdt nodes as platform
devices.

Signed-off-by: Angelo Dureghello <adureghello@xxxxxxxxxxxx>
Co-developed-by: David Lechner <dlechner@xxxxxxxxxxxx>
Co-developed-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
---
 drivers/iio/dac/adi-axi-dac.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/iio/dac/adi-axi-dac.c b/drivers/iio/dac/adi-axi-dac.c
index cc31e1dcd1df..e883cd557b6a 100644
--- a/drivers/iio/dac/adi-axi-dac.c
+++ b/drivers/iio/dac/adi-axi-dac.c
@@ -783,6 +783,7 @@ static int axi_dac_probe(struct platform_device *pdev)
 {
 	struct axi_dac_state *st;
 	const struct axi_dac_info *info;
+	struct platform_device *child_pdev;
 	void __iomem *base;
 	unsigned int ver;
 	struct clk *clk;
@@ -862,6 +863,20 @@ static int axi_dac_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, ret,
 				     "failed to register iio backend\n");
 
+	device_for_each_child_node_scoped(&pdev->dev, child) {
+		struct platform_device_info pi;
+
+		memset(&pi, 0, sizeof(pi));
+
+		pi.name = fwnode_get_name(child);
+		pi.id = PLATFORM_DEVID_AUTO;
+		pi.fwnode = child;
+
+		child_pdev = platform_device_register_full(&pi);
+		if (IS_ERR(child_pdev))
+			return PTR_ERR(child_pdev);
+	}
+
 	dev_info(&pdev->dev, "AXI DAC IP core (%d.%.2d.%c) probed\n",
 		 ADI_AXI_PCORE_VER_MAJOR(ver),
 		 ADI_AXI_PCORE_VER_MINOR(ver),

-- 
2.45.0.rc1