1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2021, The Linux Foundation. All rights reserved.
4  */
5 
6 #include <linux/clk-provider.h>
7 #include <linux/platform_device.h>
8 #include <linux/pm_clock.h>
9 #include <linux/pm_runtime.h>
10 #include <linux/module.h>
11 #include <linux/of_address.h>
12 #include <linux/regmap.h>
13 
14 #include <dt-bindings/clock/qcom,lpass-sc7280.h>
15 
16 #include "clk-regmap.h"
17 #include "clk-branch.h"
18 #include "common.h"
19 
20 static struct clk_branch lpass_top_cc_lpi_q6_axim_hs_clk = {
21 	.halt_reg = 0x0,
22 	.halt_check = BRANCH_HALT,
23 	.clkr = {
24 		.enable_reg = 0x0,
25 		.enable_mask = BIT(0),
26 		.hw.init = &(struct clk_init_data){
27 			.name = "lpass_top_cc_lpi_q6_axim_hs_clk",
28 			.ops = &clk_branch2_ops,
29 		},
30 	},
31 };
32 
33 static struct clk_branch lpass_qdsp6ss_core_clk = {
34 	.halt_reg = 0x20,
35 	/* CLK_OFF would not toggle until LPASS is out of reset */
36 	.halt_check = BRANCH_HALT_SKIP,
37 	.clkr = {
38 		.enable_reg = 0x20,
39 		.enable_mask = BIT(0),
40 		.hw.init = &(struct clk_init_data){
41 			.name = "lpass_qdsp6ss_core_clk",
42 			.ops = &clk_branch2_ops,
43 		},
44 	},
45 };
46 
47 static struct clk_branch lpass_qdsp6ss_xo_clk = {
48 	.halt_reg = 0x38,
49 	/* CLK_OFF would not toggle until LPASS is out of reset */
50 	.halt_check = BRANCH_HALT_SKIP,
51 	.clkr = {
52 		.enable_reg = 0x38,
53 		.enable_mask = BIT(0),
54 		.hw.init = &(struct clk_init_data){
55 			.name = "lpass_qdsp6ss_xo_clk",
56 			.ops = &clk_branch2_ops,
57 		},
58 	},
59 };
60 
61 static struct clk_branch lpass_qdsp6ss_sleep_clk = {
62 	.halt_reg = 0x3c,
63 	/* CLK_OFF would not toggle until LPASS is out of reset */
64 	.halt_check = BRANCH_HALT_SKIP,
65 	.clkr = {
66 		.enable_reg = 0x3c,
67 		.enable_mask = BIT(0),
68 		.hw.init = &(struct clk_init_data){
69 			.name = "lpass_qdsp6ss_sleep_clk",
70 			.ops = &clk_branch2_ops,
71 		},
72 	},
73 };
74 
75 static struct regmap_config lpass_regmap_config = {
76 	.reg_bits	= 32,
77 	.reg_stride	= 4,
78 	.val_bits	= 32,
79 	.fast_io	= true,
80 };
81 
82 static struct clk_regmap *lpass_cc_top_sc7280_clocks[] = {
83 	[LPASS_TOP_CC_LPI_Q6_AXIM_HS_CLK] =
84 				&lpass_top_cc_lpi_q6_axim_hs_clk.clkr,
85 };
86 
87 static const struct qcom_cc_desc lpass_cc_top_sc7280_desc = {
88 	.config = &lpass_regmap_config,
89 	.clks = lpass_cc_top_sc7280_clocks,
90 	.num_clks = ARRAY_SIZE(lpass_cc_top_sc7280_clocks),
91 };
92 
93 static struct clk_regmap *lpass_qdsp6ss_sc7280_clocks[] = {
94 	[LPASS_QDSP6SS_XO_CLK] = &lpass_qdsp6ss_xo_clk.clkr,
95 	[LPASS_QDSP6SS_SLEEP_CLK] = &lpass_qdsp6ss_sleep_clk.clkr,
96 	[LPASS_QDSP6SS_CORE_CLK] = &lpass_qdsp6ss_core_clk.clkr,
97 };
98 
99 static const struct qcom_cc_desc lpass_qdsp6ss_sc7280_desc = {
100 	.config = &lpass_regmap_config,
101 	.clks = lpass_qdsp6ss_sc7280_clocks,
102 	.num_clks = ARRAY_SIZE(lpass_qdsp6ss_sc7280_clocks),
103 };
104 
105 static int lpass_cc_sc7280_probe(struct platform_device *pdev)
106 {
107 	const struct qcom_cc_desc *desc;
108 	int ret;
109 
110 	ret = devm_pm_runtime_enable(&pdev->dev);
111 	if (ret)
112 		return ret;
113 
114 	ret = pm_clk_create(&pdev->dev);
115 	if (ret)
116 		return ret;
117 
118 	ret = pm_clk_add(&pdev->dev, "iface");
119 	if (ret < 0) {
120 		dev_err(&pdev->dev, "failed to acquire iface clock\n");
121 		goto destroy_pm_clk;
122 	}
123 
124 	lpass_regmap_config.name = "qdsp6ss";
125 	desc = &lpass_qdsp6ss_sc7280_desc;
126 
127 	ret = qcom_cc_probe_by_index(pdev, 0, desc);
128 	if (ret)
129 		goto destroy_pm_clk;
130 
131 	lpass_regmap_config.name = "top_cc";
132 	desc = &lpass_cc_top_sc7280_desc;
133 
134 	ret = qcom_cc_probe_by_index(pdev, 1, desc);
135 	if (ret)
136 		goto destroy_pm_clk;
137 
138 	return 0;
139 
140 destroy_pm_clk:
141 	pm_clk_destroy(&pdev->dev);
142 
143 	return ret;
144 }
145 
146 static const struct of_device_id lpass_cc_sc7280_match_table[] = {
147 	{ .compatible = "qcom,sc7280-lpasscc" },
148 	{ }
149 };
150 MODULE_DEVICE_TABLE(of, lpass_cc_sc7280_match_table);
151 
152 static struct platform_driver lpass_cc_sc7280_driver = {
153 	.probe		= lpass_cc_sc7280_probe,
154 	.driver		= {
155 		.name	= "sc7280-lpasscc",
156 		.of_match_table = lpass_cc_sc7280_match_table,
157 	},
158 };
159 
160 static int __init lpass_cc_sc7280_init(void)
161 {
162 	return platform_driver_register(&lpass_cc_sc7280_driver);
163 }
164 subsys_initcall(lpass_cc_sc7280_init);
165 
166 static void __exit lpass_cc_sc7280_exit(void)
167 {
168 	platform_driver_unregister(&lpass_cc_sc7280_driver);
169 }
170 module_exit(lpass_cc_sc7280_exit);
171 
172 MODULE_DESCRIPTION("QTI LPASS_CC SC7280 Driver");
173 MODULE_LICENSE("GPL v2");
174