| Message ID | 20240418-clk-qcom-lucid-evo-skip-configuring-enabled-v1-1-caede5f1c7a3@linaro.org (mailing list archive) |
|---|---|
| State | Awaiting Upstream, archived |
| Headers | show |
| Series | clk: qcom: clk-alpha-pll: Skip reconfiguring the running Lucid Evo | expand |
On Thu, Apr 18, 2024 at 04:41:32PM +0300, Abel Vesa wrote: > 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. > :set spell > Signed-off-by: Abel Vesa <abel.vesa@linaro.org> Reviewed-by: Bjorn Andersson <andersson@kernel.org> Regards, Bjorn > --- > 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@linaro.org> >
On Thu, 18 Apr 2024 16:41:32 +0300, Abel Vesa wrote: > 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. > > Applied, thanks! [1/1] clk: qcom: clk-alpha-pll: Skip reconfiguring the running Lucid Evo commit: 810e6d2fac01ab1e189f3002a364f19bd5d0f444 Best regards,
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);
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@linaro.org> --- drivers/clk/qcom/clk-alpha-pll.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- base-commit: 4eab358930711bbeb85bf5ee267d0d42d3394c2c change-id: 20240418-clk-qcom-lucid-evo-skip-configuring-enabled-711b7e7835b0 Best regards,