// SPDX-License-Identifier: GPL-2.0-only // // Copyright (c) 2022 MediaTek Inc. // Author: Chun-Jie Chen <chun-jie.chen@mediatek.com> #include <linux/clk-provider.h> #include <linux/platform_device.h> #include <dt-bindings/clock/mt8186-clk.h> #include "clk-mtk.h" static const char * const mcu_armpll_ll_parents[] = { "clk26m", "armpll_ll", "mainpll", "univpll_d2" }; static const char * const mcu_armpll_bl_parents[] = { "clk26m", "armpll_bl", "mainpll", "univpll_d2" }; static const char * const mcu_armpll_bus_parents[] = { "clk26m", "ccipll", "mainpll", "univpll_d2" }; /* * We only configure the CPU muxes when adjust CPU frequency in MediaTek CPUFreq Driver. * Other fields like divider always keep the same value. (set once in bootloader) */ static struct mtk_composite mcu_muxes[] = { /* CPU_PLLDIV_CFG0 */ MUX(CLK_MCU_ARMPLL_LL_SEL, "mcu_armpll_ll_sel", mcu_armpll_ll_parents, 0x2A0, 9, 2), /* CPU_PLLDIV_CFG1 */ MUX(CLK_MCU_ARMPLL_BL_SEL, "mcu_armpll_bl_sel", mcu_armpll_bl_parents, 0x2A4, 9, 2), /* BUS_PLLDIV_CFG */ MUX(CLK_MCU_ARMPLL_BUS_SEL, "mcu_armpll_bus_sel", mcu_armpll_bus_parents, 0x2E0, 9, 2), }; static const struct of_device_id of_match_clk_mt8186_mcu[] = { { .compatible = "mediatek,mt8186-mcusys", }, {} }; static int clk_mt8186_mcu_probe(struct platform_device *pdev) { struct clk_hw_onecell_data *clk_data; struct device_node *node = pdev->dev.of_node; int r; void __iomem *base; clk_data = mtk_alloc_clk_data(CLK_MCU_NR_CLK); if (!clk_data) return -ENOMEM; base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) { r = PTR_ERR(base); goto free_mcu_data; } r = mtk_clk_register_composites(&pdev->dev, mcu_muxes, ARRAY_SIZE(mcu_muxes), base, NULL, clk_data); if (r) goto free_mcu_data; r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data); if (r) goto unregister_composite_muxes; platform_set_drvdata(pdev, clk_data); return r; unregister_composite_muxes: mtk_clk_unregister_composites(mcu_muxes, ARRAY_SIZE(mcu_muxes), clk_data); free_mcu_data: mtk_free_clk_data(clk_data); return r; } static int clk_mt8186_mcu_remove(struct platform_device *pdev) { struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev); struct device_node *node = pdev->dev.of_node; of_clk_del_provider(node); mtk_clk_unregister_composites(mcu_muxes, ARRAY_SIZE(mcu_muxes), clk_data); mtk_free_clk_data(clk_data); return 0; } static struct platform_driver clk_mt8186_mcu_drv = { .probe = clk_mt8186_mcu_probe, .remove = clk_mt8186_mcu_remove, .driver = { .name = "clk-mt8186-mcu", .of_match_table = of_match_clk_mt8186_mcu, }, }; builtin_platform_driver(clk_mt8186_mcu_drv);