diff mbox series

[V2,1/4] clk: imx: composite-8m: Add support to determine_rate

Message ID 20230321023136.57986-2-aford173@gmail.com
State New
Headers
Series clk: imx: Improve imx8mm/imx8mn LCDIF clocks |

Commit Message

Adam Ford March 21, 2023, 2:31 a.m. UTC 
  Similar to imx/clk-composite-93 and imx/clk-divider-gate, the
imx8m_clk_composite_divider_ops can support determine_rate.
Without this the parent clocks are set to a fixed value, and
if a consumer needs a slower reate, the clock is divided, but
the division is only as good as the parent clock rate.

With this added, the system can attempt to adjust the parent rate
if the proper flags are set which can lead to a more precise clock
value.

Signed-off-by: Adam Ford <aford173@gmail.com>
---
V2:  No Change
diff mbox series

Patch

diff --git a/drivers/clk/imx/clk-composite-8m.c b/drivers/clk/imx/clk-composite-8m.c
index cbf0d7955a00..3b63e47f088f 100644
--- a/drivers/clk/imx/clk-composite-8m.c
+++ b/drivers/clk/imx/clk-composite-8m.c
@@ -119,10 +119,17 @@  static int imx8m_clk_composite_divider_set_rate(struct clk_hw *hw,
 	return ret;
 }
 
+static int clk_divider_determine_rate(struct clk_hw *hw,
+				      struct clk_rate_request *req)
+{
+	return clk_divider_ops.determine_rate(hw, req);
+}
+
 static const struct clk_ops imx8m_clk_composite_divider_ops = {
 	.recalc_rate = imx8m_clk_composite_divider_recalc_rate,
 	.round_rate = imx8m_clk_composite_divider_round_rate,
 	.set_rate = imx8m_clk_composite_divider_set_rate,
+	.determine_rate = clk_divider_determine_rate,
 };
 
 static u8 imx8m_clk_composite_mux_get_parent(struct clk_hw *hw)