1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // Copyright (c) 2022 MediaTek Inc.
4 // Author: Chun-Jie Chen <chun-jie.chen@mediatek.com>
5 
6 #include <linux/clk-provider.h>
7 #include <linux/platform_device.h>
8 #include <dt-bindings/clock/mt8186-clk.h>
9 
10 #include "clk-mtk.h"
11 
12 static const char * const mcu_armpll_ll_parents[] = {
13 	"clk26m",
14 	"armpll_ll",
15 	"mainpll",
16 	"univpll_d2"
17 };
18 
19 static const char * const mcu_armpll_bl_parents[] = {
20 	"clk26m",
21 	"armpll_bl",
22 	"mainpll",
23 	"univpll_d2"
24 };
25 
26 static const char * const mcu_armpll_bus_parents[] = {
27 	"clk26m",
28 	"ccipll",
29 	"mainpll",
30 	"univpll_d2"
31 };
32 
33 /*
34  * We only configure the CPU muxes when adjust CPU frequency in MediaTek CPUFreq Driver.
35  * Other fields like divider always keep the same value. (set once in bootloader)
36  */
37 static struct mtk_composite mcu_muxes[] = {
38 	/* CPU_PLLDIV_CFG0 */
39 	MUX(CLK_MCU_ARMPLL_LL_SEL, "mcu_armpll_ll_sel", mcu_armpll_ll_parents, 0x2A0, 9, 2),
40 	/* CPU_PLLDIV_CFG1 */
41 	MUX(CLK_MCU_ARMPLL_BL_SEL, "mcu_armpll_bl_sel", mcu_armpll_bl_parents, 0x2A4, 9, 2),
42 	/* BUS_PLLDIV_CFG */
43 	MUX(CLK_MCU_ARMPLL_BUS_SEL, "mcu_armpll_bus_sel", mcu_armpll_bus_parents, 0x2E0, 9, 2),
44 };
45 
46 static const struct mtk_clk_desc mcu_desc = {
47 	.composite_clks = mcu_muxes,
48 	.num_composite_clks = ARRAY_SIZE(mcu_muxes),
49 };
50 
51 static const struct of_device_id of_match_clk_mt8186_mcu[] = {
52 	{ .compatible = "mediatek,mt8186-mcusys", .data = &mcu_desc },
53 	{ /* sentinel */}
54 };
55 MODULE_DEVICE_TABLE(of, of_match_clk_mt8186_mcu);
56 
57 static struct platform_driver clk_mt8186_mcu_drv = {
58 	.driver = {
59 		.name = "clk-mt8186-mcu",
60 		.of_match_table = of_match_clk_mt8186_mcu,
61 	},
62 	.probe = mtk_clk_simple_probe,
63 	.remove = mtk_clk_simple_remove,
64 };
65 module_platform_driver(clk_mt8186_mcu_drv);
66 
67 MODULE_DESCRIPTION("MediaTek MT8186 mcusys clocks driver");
68 MODULE_LICENSE("GPL");
69