dm: clk: Add a simple version of clk_get_by_index()

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@chromium.org>

diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c
index 8a4c5680df6619d9101579fc52a635c2693b3cd4..b483c1ef33bd7905b1467a272ddc79b2bce6ba16 100644 (file)
--- 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