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Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Amit Kucheria , Thara Gopinath , Bjorn Andersson , Konrad Dybcio , linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org Cc: Richard Acayan Subject: [PATCH v4 3/4] thermal/qcom/lmh: support SDM670 and its CPU clusters Date: Fri, 27 Mar 2026 21:40:40 -0400 Message-ID: <20260328014041.83777-4-mailingradian@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260328014041.83777-1-mailingradian@gmail.com> References: <20260328014041.83777-1-mailingradian@gmail.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The LMh driver was made for Qualcomm SoCs with clusters of 4 CPUs, but some SoCs divide the CPUs into different sizes of clusters. In SDM670, the first 6 CPUs are in the little cluster and the next 2 are in the big cluster. Define the clusters in the match data and define the different cluster configuration for SDM670. Currently, this only supports 8 CPUs and tolerates linking to any CPU in the cluster. Signed-off-by: Richard Acayan --- drivers/thermal/qcom/lmh.c | 69 +++++++++++++++++++++++++++++++------- 1 file changed, 56 insertions(+), 13 deletions(-) diff --git a/drivers/thermal/qcom/lmh.c b/drivers/thermal/qcom/lmh.c index 3d072b7a4a6d..46c1e301f6c8 100644 --- a/drivers/thermal/qcom/lmh.c +++ b/drivers/thermal/qcom/lmh.c @@ -30,14 +30,17 @@ #define LMH_REG_DCVS_INTR_CLR 0x8 -#define LMH_ENABLE_ALGOS 1 - struct lmh_hw_data { void __iomem *base; struct irq_domain *domain; int irq; }; +struct lmh_soc_data { + bool enable_algos; + u32 node_ids[8]; +}; + static irqreturn_t lmh_handle_irq(int hw_irq, void *data) { struct lmh_hw_data *lmh_data = data; @@ -100,8 +103,8 @@ static int lmh_probe(struct platform_device *pdev) struct device_node *np = dev->of_node; struct device_node *cpu_node; struct lmh_hw_data *lmh_data; + const struct lmh_soc_data *match_data; int temp_low, temp_high, temp_arm, cpu_id, ret; - unsigned int enable_alg; u32 node_id; if (!qcom_scm_is_available()) @@ -144,10 +147,9 @@ static int lmh_probe(struct platform_device *pdev) * for other platforms, revisit this to check if the should be part * of a dt match table. */ - if (cpu_id == 0) { - node_id = LMH_CLUSTER0_NODE_ID; - } else if (cpu_id == 4) { - node_id = LMH_CLUSTER1_NODE_ID; + match_data = of_device_get_match_data(dev); + if (cpu_id >= 0 && cpu_id < 8) { + node_id = match_data->node_ids[cpu_id]; } else { dev_err(dev, "Wrong CPU id associated with LMh node\n"); return -EINVAL; @@ -156,9 +158,7 @@ static int lmh_probe(struct platform_device *pdev) if (!qcom_scm_lmh_dcvsh_available()) return -EINVAL; - enable_alg = (uintptr_t)of_device_get_match_data(dev); - - if (enable_alg) { + if (match_data->enable_algos) { ret = qcom_scm_lmh_dcvsh(LMH_SUB_FN_CRNT, LMH_ALGO_MODE_ENABLE, 1, LMH_NODE_DCVS, node_id, 0); if (ret) @@ -231,10 +231,53 @@ static int lmh_probe(struct platform_device *pdev) return 0; } +static const struct lmh_soc_data sdm670_lmh_data = { + .enable_algos = true, + .node_ids = { + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER1_NODE_ID, + LMH_CLUSTER1_NODE_ID, + }, +}; + +static const struct lmh_soc_data sdm845_lmh_data = { + .enable_algos = true, + .node_ids = { + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER1_NODE_ID, + LMH_CLUSTER1_NODE_ID, + LMH_CLUSTER1_NODE_ID, + LMH_CLUSTER1_NODE_ID, + }, +}; + +static const struct lmh_soc_data sm8150_lmh_data = { + .enable_algos = false, + .node_ids = { + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER0_NODE_ID, + LMH_CLUSTER1_NODE_ID, + LMH_CLUSTER1_NODE_ID, + LMH_CLUSTER1_NODE_ID, + LMH_CLUSTER1_NODE_ID, + }, +}; + static const struct of_device_id lmh_table[] = { - { .compatible = "qcom,sc8180x-lmh", }, - { .compatible = "qcom,sdm845-lmh", .data = (void *)LMH_ENABLE_ALGOS}, - { .compatible = "qcom,sm8150-lmh", }, + { .compatible = "qcom,sc8180x-lmh", .data = &sm8150_lmh_data }, + { .compatible = "qcom,sdm670-lmh", .data = &sdm670_lmh_data }, + { .compatible = "qcom,sdm845-lmh", .data = &sdm845_lmh_data }, + { .compatible = "qcom,sm8150-lmh", .data = &sm8150_lmh_data }, {} }; MODULE_DEVICE_TABLE(of, lmh_table); -- 2.53.0