[PATCH v2 41/46] soc: mediatek: mtk-mmsys: Populate multimedia subsystem subdevices

[AngeloGioacchino Del Regno]

The multimedia hardware subsystem contains all of the multimedia
related sub-devices, and that really is by hardware design, not
anything software related.

In order to allow specifying a correct description of the hardware
in devicetrees, add support for probing subdevices of multimedia
controllers, specified as subnodes.

Acked-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
---
 drivers/soc/mediatek/mtk-mmsys.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-mmsys.c b/drivers/soc/mediatek/mtk-mmsys.c
index f501a29a7697..6c02b898741c 100644
--- a/drivers/soc/mediatek/mtk-mmsys.c
+++ b/drivers/soc/mediatek/mtk-mmsys.c
@@ -12,6 +12,7 @@
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/reset-controller.h>
 #include <linux/soc/mediatek/mtk-mmsys.h>
@@ -489,6 +490,13 @@ static int mtk_mmsys_probe(struct platform_device *pdev)
 		return PTR_ERR(clks);
 	mmsys->clks_pdev = clks;
 
+	ret = devm_of_platform_populate(dev);
+	if (ret) {
+		dev_err(dev, "Failed to populate child devices: %d\n", ret);
+		platform_device_unregister(clks);
+		return ret;
+	}
+
 	if (mmsys->data->is_vppsys)
 		goto out_probe_done;
 
-- 
2.54.0