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Thu, 18 Apr 2024 06:41:39 -0700 (PDT) Received: from [127.0.1.1] ([62.231.100.236]) by smtp.gmail.com with ESMTPSA id bi18-20020a05600c3d9200b00418d5b16fa2sm3540809wmb.30.2024.04.18.06.41.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Apr 2024 06:41:39 -0700 (PDT) From: Abel Vesa Date: Thu, 18 Apr 2024 16:41:32 +0300 Subject: [PATCH] clk: qcom: clk-alpha-pll: Skip reconfiguring the running Lucid Evo Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240418-clk-qcom-lucid-evo-skip-configuring-enabled-v1-1-caede5f1c7a3@linaro.org> X-B4-Tracking: v=1; b=H4sIAAwjIWYC/x3NQQqDMBBA0avIrDuQWEukVyldmMmYDqYTm6AUx Ls3dPk2/x9QuQhXuHcHFN6lStYGe+mAXpNGRgnN0Jt+MIMdkdKCH8pvTBtJQN4z1kVWpKyzxK2 IRmSdfOKAzlrv2I3XmzfQimvhWb7/2+N5nj/6GHCzfQAAAA== To: Bjorn Andersson , Michael Turquette , Stephen Boyd , Konrad Dybcio , Dmitry Baryshkov Cc: linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Abel Vesa X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; 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a=openpgp; fpr=6AFF162D57F4223A8770EF5AF7BF214136F41FAE 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 Reviewed-by: Bjorn Andersson --- 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_pl= l *pll, struct regmap *regma { u32 lval =3D config->l; =20 + /* + * 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 |=3D 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, --=20 Abel Vesa