1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2014 MediaTek Inc.
4  * Copyright (c) 2022 Collabora Ltd.
5  * Author: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
6  */
7 
8 #include <dt-bindings/clock/mt8173-clk.h>
9 #include <linux/module.h>
10 #include <linux/platform_device.h>
11 #include "clk-cpumux.h"
12 #include "clk-gate.h"
13 #include "clk-mtk.h"
14 #include "reset.h"
15 
16 #define GATE_ICG(_id, _name, _parent, _shift)			\
17 		GATE_MTK(_id, _name, _parent, &infra_cg_regs,	\
18 			 _shift, &mtk_clk_gate_ops_setclr)
19 
20 static struct clk_hw_onecell_data *infra_clk_data;
21 
22 static const struct mtk_gate_regs infra_cg_regs = {
23 	.set_ofs = 0x0040,
24 	.clr_ofs = 0x0044,
25 	.sta_ofs = 0x0048,
26 };
27 
28 static const char * const ca53_parents[] __initconst = {
29 	"clk26m",
30 	"armca7pll",
31 	"mainpll",
32 	"univpll"
33 };
34 
35 static const char * const ca72_parents[] __initconst = {
36 	"clk26m",
37 	"armca15pll",
38 	"mainpll",
39 	"univpll"
40 };
41 
42 static const struct mtk_composite cpu_muxes[] = {
43 	MUX(CLK_INFRA_CA53SEL, "infra_ca53_sel", ca53_parents, 0x0000, 0, 2),
44 	MUX(CLK_INFRA_CA72SEL, "infra_ca72_sel", ca72_parents, 0x0000, 2, 2),
45 };
46 
47 static const struct mtk_fixed_factor infra_early_divs[] = {
48 	FACTOR(CLK_INFRA_CLK_13M, "clk13m", "clk26m", 1, 2),
49 };
50 
51 static const struct mtk_gate infra_gates[] = {
52 	GATE_ICG(CLK_INFRA_DBGCLK, "infra_dbgclk", "axi_sel", 0),
53 	GATE_ICG(CLK_INFRA_SMI, "infra_smi", "mm_sel", 1),
54 	GATE_ICG(CLK_INFRA_AUDIO, "infra_audio", "aud_intbus_sel", 5),
55 	GATE_ICG(CLK_INFRA_GCE, "infra_gce", "axi_sel", 6),
56 	GATE_ICG(CLK_INFRA_L2C_SRAM, "infra_l2c_sram", "axi_sel", 7),
57 	GATE_ICG(CLK_INFRA_M4U, "infra_m4u", "mem_sel", 8),
58 	GATE_ICG(CLK_INFRA_CPUM, "infra_cpum", "cpum_ck", 15),
59 	GATE_ICG(CLK_INFRA_KP, "infra_kp", "axi_sel", 16),
60 	GATE_ICG(CLK_INFRA_CEC, "infra_cec", "clk26m", 18),
61 	GATE_ICG(CLK_INFRA_PMICSPI, "infra_pmicspi", "pmicspi_sel", 22),
62 	GATE_ICG(CLK_INFRA_PMICWRAP, "infra_pmicwrap", "axi_sel", 23),
63 };
64 
65 static u16 infrasys_rst_ofs[] = { 0x30, 0x34 };
66 
67 static const struct mtk_clk_rst_desc clk_rst_desc = {
68 	.version = MTK_RST_SIMPLE,
69 	.rst_bank_ofs = infrasys_rst_ofs,
70 	.rst_bank_nr = ARRAY_SIZE(infrasys_rst_ofs),
71 };
72 
73 static const struct of_device_id of_match_clk_mt8173_infracfg[] = {
74 	{ .compatible = "mediatek,mt8173-infracfg" },
75 	{ /* sentinel */ }
76 };
77 MODULE_DEVICE_TABLE(of, of_match_clk_mt8173_infracfg);
78 
79 static void clk_mt8173_infra_init_early(struct device_node *node)
80 {
81 	int i;
82 
83 	infra_clk_data = mtk_alloc_clk_data(CLK_INFRA_NR_CLK);
84 	if (!infra_clk_data)
85 		return;
86 
87 	for (i = 0; i < CLK_INFRA_NR_CLK; i++)
88 		infra_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER);
89 
90 	mtk_clk_register_factors(infra_early_divs,
91 				 ARRAY_SIZE(infra_early_divs), infra_clk_data);
92 
93 	of_clk_add_hw_provider(node, of_clk_hw_onecell_get, infra_clk_data);
94 }
95 CLK_OF_DECLARE_DRIVER(mtk_infrasys, "mediatek,mt8173-infracfg",
96 		      clk_mt8173_infra_init_early);
97 
98 static int clk_mt8173_infracfg_probe(struct platform_device *pdev)
99 {
100 	struct device_node *node = pdev->dev.of_node;
101 	int r;
102 
103 	r = mtk_clk_register_gates(&pdev->dev, node, infra_gates,
104 				   ARRAY_SIZE(infra_gates), infra_clk_data);
105 	if (r)
106 		return r;
107 
108 	r = mtk_clk_register_cpumuxes(&pdev->dev, node, cpu_muxes,
109 				      ARRAY_SIZE(cpu_muxes), infra_clk_data);
110 	if (r)
111 		goto unregister_gates;
112 
113 	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, infra_clk_data);
114 	if (r)
115 		goto unregister_cpumuxes;
116 
117 	r = mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
118 	if (r)
119 		goto unregister_clk_hw;
120 
121 	return 0;
122 
123 unregister_clk_hw:
124 	of_clk_del_provider(node);
125 unregister_cpumuxes:
126 	mtk_clk_unregister_cpumuxes(cpu_muxes, ARRAY_SIZE(cpu_muxes), infra_clk_data);
127 unregister_gates:
128 	mtk_clk_unregister_gates(infra_gates, ARRAY_SIZE(infra_gates), infra_clk_data);
129 	return r;
130 }
131 
132 static void clk_mt8173_infracfg_remove(struct platform_device *pdev)
133 {
134 	struct device_node *node = pdev->dev.of_node;
135 	struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);
136 
137 	of_clk_del_provider(node);
138 	mtk_clk_unregister_cpumuxes(cpu_muxes, ARRAY_SIZE(cpu_muxes), clk_data);
139 	mtk_clk_unregister_gates(infra_gates, ARRAY_SIZE(infra_gates), clk_data);
140 	mtk_free_clk_data(clk_data);
141 }
142 
143 static struct platform_driver clk_mt8173_infracfg_drv = {
144 	.driver = {
145 		.name = "clk-mt8173-infracfg",
146 		.of_match_table = of_match_clk_mt8173_infracfg,
147 	},
148 	.probe = clk_mt8173_infracfg_probe,
149 	.remove_new = clk_mt8173_infracfg_remove,
150 };
151 module_platform_driver(clk_mt8173_infracfg_drv);
152 
153 MODULE_DESCRIPTION("MediaTek MT8173 infracfg clocks driver");
154 MODULE_LICENSE("GPL");
155