[PATCH v2 7/7] phy: phy-mtk-tphy: make ref clock optional

[Chunfeng Yun]

If make the ref clock optional, no need refer to fixed-clock when
the ref clock is always on or comes from oscillator directly.

Signed-off-by: Chunfeng Yun <chunfeng....@mediatek.com>
Reviewed-by: Simon Glass <s...@chromium.org>
Reviewed-by: Ryder Lee <ryder....@mediatek.com>
---
v2: add reviewed-by Simon & Ryder
---
 drivers/phy/phy-mtk-tphy.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/phy-mtk-tphy.c b/drivers/phy/phy-mtk-tphy.c
index c4fb404f20..fd33062ae4 100644
--- a/drivers/phy/phy-mtk-tphy.c
+++ b/drivers/phy/phy-mtk-tphy.c
@@ -338,7 +338,8 @@ static int mtk_tphy_probe(struct udevice *dev)
                tphy->phys[index] = instance;
                index++;
 
-               err = clk_get_by_index_nodev(subnode, 0, &instance->ref_clk);
+               err = clk_get_optional_nodev(subnode, "ref",
+                                            &instance->ref_clk);
                if (err)
                        return err;
        }
-- 
2.24.1