The PLL0 is configured by the bootlader and is the parent of the
mdp_clk_src. The Trion implementation of the configure function is
already skipping this step if the PLL is enabled, so lets extend the
same behavior to Lucid Evo variant.
Signed-off-by: Abel Vesa <abel.vesa@xxxxxxxxxx>
---
drivers/clk/qcom/clk-alpha-pll.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index 8a412ef47e16..4c5aeccff0ef 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -2114,6 +2114,15 @@ void clk_lucid_evo_pll_configure(struct clk_alpha_pll *pll, struct regmap *regma
{
u32 lval = config->l;
+ /*
+ * If the bootloader left the PLL enabled it's likely that there are
+ * RCGs that will lock up if we disable the PLL below.
+ */
+ if (trion_pll_is_enabled(pll, regmap)) {
+ pr_debug("Lucid Evo PLL is already enabled, skipping configuration\n");
+ return;
+ }
+
lval |= TRION_PLL_CAL_VAL << LUCID_EVO_PLL_CAL_L_VAL_SHIFT;
clk_alpha_pll_write_config(regmap, PLL_L_VAL(pll), lval);
clk_alpha_pll_write_config(regmap, PLL_ALPHA_VAL(pll), config->alpha);
---
base-commit: 4eab358930711bbeb85bf5ee267d0d42d3394c2c
change-id: 20240418-clk-qcom-lucid-evo-skip-configuring-enabled-711b7e7835b0
Best regards,
--
Abel Vesa <abel.vesa@xxxxxxxxxx>
