1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2022 Collabora Ltd.
4  * Author: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
5  */
6 
7 #include <dt-bindings/clock/mediatek,mt6795-clk.h>
8 #include <dt-bindings/reset/mediatek,mt6795-resets.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_no_setclr)
19 
20 static const struct mtk_gate_regs infra_cg_regs = {
21 	.set_ofs = 0x0040,
22 	.clr_ofs = 0x0044,
23 	.sta_ofs = 0x0048,
24 };
25 
26 static const char * const ca53_c0_parents[] = {
27 	"clk26m",
28 	"armca53pll",
29 	"mainpll",
30 	"univpll"
31 };
32 
33 static const char * const ca53_c1_parents[] = {
34 	"clk26m",
35 	"armca53pll",
36 	"mainpll",
37 	"univpll"
38 };
39 
40 static const struct mtk_composite cpu_muxes[] = {
41 	MUX(CLK_INFRA_CA53_C0_SEL, "infra_ca53_c0_sel", ca53_c0_parents, 0x00, 0, 2),
42 	MUX(CLK_INFRA_CA53_C1_SEL, "infra_ca53_c1_sel", ca53_c1_parents, 0x00, 2, 2),
43 };
44 
45 static const struct mtk_gate infra_gates[] = {
46 	GATE_ICG(CLK_INFRA_DBGCLK, "infra_dbgclk", "axi_sel", 0),
47 	GATE_ICG(CLK_INFRA_SMI, "infra_smi", "mm_sel", 1),
48 	GATE_ICG(CLK_INFRA_AUDIO, "infra_audio", "aud_intbus_sel", 5),
49 	GATE_ICG(CLK_INFRA_GCE, "infra_gce", "axi_sel", 6),
50 	GATE_ICG(CLK_INFRA_L2C_SRAM, "infra_l2c_sram", "axi_sel", 7),
51 	GATE_ICG(CLK_INFRA_M4U, "infra_m4u", "mem_sel", 8),
52 	GATE_ICG(CLK_INFRA_MD1MCU, "infra_md1mcu", "clk26m", 9),
53 	GATE_ICG(CLK_INFRA_MD1BUS, "infra_md1bus", "axi_sel", 10),
54 	GATE_ICG(CLK_INFRA_MD1DBB, "infra_dbb", "axi_sel", 11),
55 	GATE_ICG(CLK_INFRA_DEVICE_APC, "infra_devapc", "clk26m", 12),
56 	GATE_ICG(CLK_INFRA_TRNG, "infra_trng", "axi_sel", 13),
57 	GATE_ICG(CLK_INFRA_MD1LTE, "infra_md1lte", "axi_sel", 14),
58 	GATE_ICG(CLK_INFRA_CPUM, "infra_cpum", "cpum_ck", 15),
59 	GATE_ICG(CLK_INFRA_KP, "infra_kp", "axi_sel", 16),
60 };
61 
62 static u16 infra_ao_rst_ofs[] = { 0x30, 0x34 };
63 
64 static u16 infra_ao_idx_map[] = {
65 	[MT6795_INFRA_RST0_SCPSYS_RST]    = 0 * RST_NR_PER_BANK + 5,
66 	[MT6795_INFRA_RST0_PMIC_WRAP_RST] = 0 * RST_NR_PER_BANK + 7,
67 	[MT6795_INFRA_RST1_MIPI_DSI_RST]  = 1 * RST_NR_PER_BANK + 4,
68 	[MT6795_INFRA_RST1_MIPI_CSI_RST]  = 1 * RST_NR_PER_BANK + 7,
69 	[MT6795_INFRA_RST1_MM_IOMMU_RST]  = 1 * RST_NR_PER_BANK + 15,
70 };
71 
72 static const struct mtk_clk_rst_desc clk_rst_desc = {
73 	.version = MTK_RST_SET_CLR,
74 	.rst_bank_ofs = infra_ao_rst_ofs,
75 	.rst_bank_nr = ARRAY_SIZE(infra_ao_rst_ofs),
76 	.rst_idx_map = infra_ao_idx_map,
77 	.rst_idx_map_nr = ARRAY_SIZE(infra_ao_idx_map),
78 };
79 
80 static const struct of_device_id of_match_clk_mt6795_infracfg[] = {
81 	{ .compatible = "mediatek,mt6795-infracfg" },
82 	{ /* sentinel */ }
83 };
84 
85 static int clk_mt6795_infracfg_probe(struct platform_device *pdev)
86 {
87 	struct clk_hw_onecell_data *clk_data;
88 	struct device_node *node = pdev->dev.of_node;
89 	void __iomem *base;
90 	int ret;
91 
92 	base = devm_platform_ioremap_resource(pdev, 0);
93 	if (IS_ERR(base))
94 		return PTR_ERR(base);
95 
96 	clk_data = mtk_alloc_clk_data(CLK_INFRA_NR_CLK);
97 	if (!clk_data)
98 		return -ENOMEM;
99 
100 	ret = mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
101 	if (ret)
102 		goto free_clk_data;
103 
104 	ret = mtk_clk_register_gates(&pdev->dev, node, infra_gates,
105 				     ARRAY_SIZE(infra_gates), clk_data);
106 	if (ret)
107 		goto free_clk_data;
108 
109 	ret = mtk_clk_register_cpumuxes(&pdev->dev, node, cpu_muxes,
110 					ARRAY_SIZE(cpu_muxes), clk_data);
111 	if (ret)
112 		goto unregister_gates;
113 
114 	ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
115 	if (ret)
116 		goto unregister_cpumuxes;
117 
118 	return 0;
119 
120 unregister_cpumuxes:
121 	mtk_clk_unregister_cpumuxes(cpu_muxes, ARRAY_SIZE(cpu_muxes), clk_data);
122 unregister_gates:
123 	mtk_clk_unregister_gates(infra_gates, ARRAY_SIZE(infra_gates), clk_data);
124 free_clk_data:
125 	mtk_free_clk_data(clk_data);
126 	return ret;
127 }
128 
129 static int clk_mt6795_infracfg_remove(struct platform_device *pdev)
130 {
131 	struct device_node *node = pdev->dev.of_node;
132 	struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);
133 
134 	of_clk_del_provider(node);
135 	mtk_clk_unregister_cpumuxes(cpu_muxes, ARRAY_SIZE(cpu_muxes), clk_data);
136 	mtk_clk_unregister_gates(infra_gates, ARRAY_SIZE(infra_gates), clk_data);
137 	mtk_free_clk_data(clk_data);
138 
139 	return 0;
140 }
141 
142 static struct platform_driver clk_mt6795_infracfg_drv = {
143 	.driver = {
144 		.name = "clk-mt6795-infracfg",
145 		.of_match_table = of_match_clk_mt6795_infracfg,
146 	},
147 	.probe = clk_mt6795_infracfg_probe,
148 	.remove = clk_mt6795_infracfg_remove,
149 };
150 module_platform_driver(clk_mt6795_infracfg_drv);
151 
152 MODULE_DESCRIPTION("MediaTek MT6795 infracfg clocks driver");
153 MODULE_LICENSE("GPL");
154