[U-Boot] [PATCH v2 1/2] clk: clk-uclass: Add post binding for CLK uclass

[Wenyou Yang]

Add post binding support for CLK uclass to recursively bind
its children as clk devices.

Signed-off-by: Wenyou Yang <wenyou.yang at atmel.com>
---

Changes in v2: None

 drivers/clk/clk-uclass.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c
index b483c1e..ee568e4 100644
--- a/drivers/clk/clk-uclass.c
+++ b/drivers/clk/clk-uclass.c
@@ -106,7 +106,58 @@ int clk_get_by_index(struct udevice *dev, int index, struct udevice **clk_devp)
 }
 #endif
 
+/**
+ * clk_post-bind() - post binding for CLK uclass
+ * Recursively bind its children as clk devices.
+ *
+ * @dev: clk device
+ * @return: 0 on success, or negative error code on failure
+ */
+static int clk_post_bind(struct udevice *dev)
+{
+	const void *fdt = gd->fdt_blob;
+	int offset = dev->of_offset;
+	bool pre_reloc_only = !(gd->flags & GD_FLG_RELOC);
+	const char *name;
+	int ret;
+
+	for (offset = fdt_first_subnode(fdt, offset);
+	     offset > 0;
+	     offset = fdt_next_subnode(fdt, offset)) {
+		if (pre_reloc_only &&
+		    !fdt_getprop(fdt, offset, "u-boot,dm-pre-reloc", NULL))
+			continue;
+		/*
+		 * If this node has "compatible" property, this is not a clk
+		 * node, but a normal device. skip.
+		 */
+		fdt_get_property(fdt, offset, "compatible", &ret);
+		if (ret >= 0)
+			continue;
+
+		if (ret != -FDT_ERR_NOTFOUND)
+			return ret;
+
+		name = fdt_get_name(fdt, offset, NULL);
+		if (!name)
+			return -EINVAL;
+
+		ret = device_bind_driver_to_node(dev, "clk", name,
+						 offset, NULL);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
 UCLASS_DRIVER(clk) = {
 	.id		= UCLASS_CLK,
+	.post_bind	= clk_post_bind,
 	.name		= "clk",
 };
+
+U_BOOT_DRIVER(clk_generic) = {
+	.id	= UCLASS_CLK,
+	.name	= "clk",
+};
-- 
2.7.4