[PATCH 11/32] clk: mediatek: Add auto-population of sub-devices support in simple probe

MediaTek audio clock drivers call devm_of_platform_populate() after
mtk_clk_simple_probe(). Extend __mtk_clk_simple_probe() to run
devm_of_platform_populate() when the new 'populate_children' flag is
set, reducing boilerplate.

Note that explicit of_platform_depopulate() calls in remove functions
are unnecessary because devm_of_platform_populate() is managed by
devres and cleans up automatically.

Signed-off-by: Akari Tsuyukusa <[email protected]>
---
 drivers/clk/mediatek/clk-mtk.c | 7 +++++++
 drivers/clk/mediatek/clk-mtk.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index c3369a04cdec..71d70b5a9990 100644
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
@@ -609,6 +610,12 @@ static int __mtk_clk_simple_probe(struct platform_device *pdev,
 	if (mcd->need_runtime_pm)
 		pm_runtime_put(&pdev->dev);
 
+	if (mcd->populate_children) {
+		r = devm_of_platform_populate(&pdev->dev);
+		if (r)
+			goto unregister_clks;
+	}
+
 	return r;
 
 unregister_clks:
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index b6504b3e77ed..11939e3e0b38 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -265,6 +265,7 @@ struct mtk_clk_desc {
 	unsigned int mfg_clk_idx;
 
 	bool need_runtime_pm;
+	bool populate_children;
 };
 
 int mtk_clk_pdev_probe(struct platform_device *pdev);
-- 
2.55.0