From 8737ec830ee32162858af7c1504169b05b313ab1 Mon Sep 17 00:00:00 2001 From: Varadarajan Narayanan Date: Tue, 30 Apr 2024 12:12:12 +0530 Subject: [PATCH] clk: qcom: common: Add interconnect clocks support Unlike MSM platforms that manage NoC related clocks and scaling from RPM, IPQ SoCs dont involve RPM in managing NoC related clocks and there is no NoC scaling. However, there is a requirement to enable some NoC interface clocks for accessing the peripheral controllers present on these NoCs. Though exposing these as normal clocks would work, having a minimalistic interconnect driver to handle these clocks would make it consistent with other Qualcomm platforms resulting in common code paths. This is similar to msm8996-cbf's usage of icc-clk framework. Signed-off-by: Varadarajan Narayanan Link: https://lore.kernel.org/r/20240430064214.2030013-5-quic_varada@quicinc.com Signed-off-by: Bjorn Andersson --- drivers/clk/qcom/common.c | 35 ++++++++++++++++++++++++++++++++++- drivers/clk/qcom/common.h | 9 +++++++++ 2 files changed, 43 insertions(+), 1 deletion(-) --- a/drivers/clk/qcom/common.c +++ b/drivers/clk/qcom/common.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include @@ -250,6 +251,38 @@ static struct clk_hw *qcom_cc_clk_hw_get return cc->rclks[idx] ? &cc->rclks[idx]->hw : NULL; } +static int qcom_cc_icc_register(struct device *dev, + const struct qcom_cc_desc *desc) +{ + struct icc_clk_data *icd; + struct clk_hw *hws; + int i; + + if (!IS_ENABLED(CONFIG_INTERCONNECT_CLK)) + return 0; + + if (!desc->icc_hws) + return 0; + + icd = devm_kcalloc(dev, desc->num_icc_hws, sizeof(*icd), GFP_KERNEL); + if (!icd) + return -ENOMEM; + + for (i = 0; i < desc->num_icc_hws; i++) { + icd[i].master_id = desc->icc_hws[i].master_id; + icd[i].slave_id = desc->icc_hws[i].slave_id; + hws = &desc->clks[desc->icc_hws[i].clk_id]->hw; + icd[i].clk = devm_clk_hw_get_clk(dev, hws, "icc"); + if (!icd[i].clk) + return dev_err_probe(dev, -ENOENT, + "(%d) clock entry is null\n", i); + icd[i].name = clk_hw_get_name(hws); + } + + return devm_icc_clk_register(dev, desc->icc_first_node_id, + desc->num_icc_hws, icd); +} + int qcom_cc_really_probe(struct device *dev, const struct qcom_cc_desc *desc, struct regmap *regmap) { @@ -318,7 +351,7 @@ int qcom_cc_really_probe(struct device * if (ret) return ret; - return 0; + return qcom_cc_icc_register(dev, desc); } EXPORT_SYMBOL_GPL(qcom_cc_really_probe); --- a/drivers/clk/qcom/common.h +++ b/drivers/clk/qcom/common.h @@ -19,6 +19,12 @@ struct clk_hw; #define PLL_VOTE_FSM_ENA BIT(20) #define PLL_VOTE_FSM_RESET BIT(21) +struct qcom_icc_hws_data { + int master_id; + int slave_id; + int clk_id; +}; + struct qcom_cc_desc { const struct regmap_config *config; struct clk_regmap **clks; @@ -29,6 +35,9 @@ struct qcom_cc_desc { size_t num_gdscs; struct clk_hw **clk_hws; size_t num_clk_hws; + struct qcom_icc_hws_data *icc_hws; + size_t num_icc_hws; + unsigned int icc_first_node_id; }; /**