Add support for APMIXED parent in infra MUX. This is the case for mt7622
that reference APMIXED parents for the MUX1_SEL clock.

We assume the second level parent is always APMIXED.

Signed-off-by: Christian Marangi <ansuels...@gmail.com>
---
 drivers/clk/mediatek/clk-mtk.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index c1d171624b9..66683aeb2d7 100644
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -488,6 +488,10 @@ static ulong mtk_find_parent_rate(struct mtk_clk_priv 
*priv, struct clk *clk,
        switch (flags & CLK_PARENT_MASK) {
        case CLK_PARENT_XTAL:
                return priv->tree->xtal_rate;
+       /* Assume the second level parent is always APMIXED */
+       case CLK_PARENT_APMIXED:
+               priv = dev_get_priv(priv->parent);
+               fallthrough;
        case CLK_PARENT_TOPCKGEN:
                return mtk_clk_find_parent_rate(clk, parent, priv->parent);
        default:
-- 
2.45.1

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