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