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author | Abel Vesa <abel.vesa@linaro.org> | 2024-04-18 16:41:32 +0300 |
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committer | Bjorn Andersson <andersson@kernel.org> | 2024-04-20 11:50:26 -0500 |
commit | 810e6d2fac01ab1e189f3002a364f19bd5d0f444 (patch) | |
tree | a9fdb1e6b36820d2e007fba9cff9c9b04bd7044b /drivers | |
parent | 1aab318f1e4900fac325e0d55a0591108ea0cfbb (diff) | |
download | linux-stable-810e6d2fac01ab1e189f3002a364f19bd5d0f444.tar.gz linux-stable-810e6d2fac01ab1e189f3002a364f19bd5d0f444.tar.bz2 linux-stable-810e6d2fac01ab1e189f3002a364f19bd5d0f444.zip |
clk: qcom: clk-alpha-pll: Skip reconfiguring the running Lucid Evo
The PLL0 is configured by the bootloader 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@linaro.org>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20240418-clk-qcom-lucid-evo-skip-configuring-enabled-v1-1-caede5f1c7a3@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/clk/qcom/clk-alpha-pll.c | 9 |
1 files changed, 9 insertions, 0 deletions
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); |