[U-Boot] [PATCH v9 36/49] dm: clk: Add a simple version of clk_get_by_index()

[Simon Glass]

This function adds quite a bit of code to SPL and we probably don't need
all the features in SPL. Add a simple version (for SPL only) to save space.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v9: None
Changes in v2:
- Add an assert for clk_devp

 drivers/clk/clk-uclass.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c
index 8a4c568..b483c1e 100644
--- a/drivers/clk/clk-uclass.c
+++ b/drivers/clk/clk-uclass.c
@@ -67,8 +67,23 @@ ulong clk_set_periph_rate(struct udevice *dev, int periph, ulong rate)
 #if CONFIG_IS_ENABLED(OF_CONTROL)
 int clk_get_by_index(struct udevice *dev, int index, struct udevice **clk_devp)
 {
-	struct fdtdec_phandle_args args;
 	int ret;
+#ifdef CONFIG_SPL_BUILD
+	u32 cell[2];
+
+	if (index != 0)
+		return -ENOSYS;
+	assert(*clk_devp);
+	ret = uclass_get_device(UCLASS_CLK, 0, clk_devp);
+	if (ret)
+		return ret;
+	ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, "clocks",
+				   cell, 2);
+	if (ret)
+		return ret;
+	return cell[1];
+#else
+	struct fdtdec_phandle_args args;
 
 	assert(*clk_devp);
 	ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev->of_offset,
@@ -87,6 +102,7 @@ int clk_get_by_index(struct udevice *dev, int index, struct udevice **clk_devp)
 		return ret;
 	}
 	return args.args_count > 0 ? args.args[0] : 0;
+#endif
 }
 #endif
 
-- 
2.7.0.rc3.207.g0ac5344