clk: imx: composite-8m: Add support to determine_rate

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>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20230323230127.120883-2-aford173@gmail.com

diff --git a/drivers/clk/imx/clk-composite-8m.c b/drivers/clk/imx/clk-composite-8m.c
index cbf0d7955a00ae1b5dbb11921054c94f82a11f5d..6883a8199b6c38d173cc5fb37eaa346ce0761b11 100644 (file)
--- 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 imx8m_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 = imx8m_clk_divider_determine_rate,
 };
 
 static u8 imx8m_clk_composite_mux_get_parent(struct clk_hw *hw)