[PATCH v2 3/5] clk: rockchip: rk3588: support aclk_top_root set 750M

[Elaine Zhang]

aclk_top_root choose a parent clock that does not change.

Signed-off-by: Elaine Zhang <zhangqing at rock-chips.com>
---
 drivers/clk/rockchip/clk_rk3588.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/rockchip/clk_rk3588.c b/drivers/clk/rockchip/clk_rk3588.c
index c86176264147..7ba037ad72ba 100644
--- a/drivers/clk/rockchip/clk_rk3588.c
+++ b/drivers/clk/rockchip/clk_rk3588.c
@@ -306,12 +306,18 @@ static ulong rk3588_top_set_clk(struct rk3588_clk_priv *priv,
 
 	switch (clk_id) {
 	case ACLK_TOP_ROOT:
-		src_clk_div = DIV_ROUND_UP(priv->gpll_hz, rate);
+		if (!(priv->cpll_hz % rate)) {
+			src_clk = ACLK_TOP_ROOT_SRC_SEL_CPLL;
+			src_clk_div = DIV_ROUND_UP(priv->cpll_hz, rate);
+		} else {
+			src_clk = ACLK_TOP_ROOT_SRC_SEL_GPLL;
+			src_clk_div = DIV_ROUND_UP(priv->gpll_hz, rate);
+		}
 		assert(src_clk_div - 1 <= 31);
 		rk_clrsetreg(&cru->clksel_con[8],
 			     ACLK_TOP_ROOT_DIV_MASK |
 			     ACLK_TOP_ROOT_SRC_SEL_MASK,
-			     (ACLK_TOP_ROOT_SRC_SEL_GPLL <<
+			     (src_clk <<
 			      ACLK_TOP_ROOT_SRC_SEL_SHIFT) |
 			     (src_clk_div - 1) << ACLK_TOP_ROOT_DIV_SHIFT);
 		break;
-- 
2.17.1