1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2019, Linaro Ltd.
4  */
5 
6 #include <linux/bitops.h>
7 #include <linux/clk-provider.h>
8 #include <linux/err.h>
9 #include <linux/platform_device.h>
10 #include <linux/module.h>
11 #include <linux/of_address.h>
12 #include <linux/pm_clock.h>
13 #include <linux/pm_runtime.h>
14 #include <linux/regmap.h>
15 
16 #include <dt-bindings/clock/qcom,turingcc-qcs404.h>
17 
18 #include "clk-regmap.h"
19 #include "clk-branch.h"
20 #include "common.h"
21 #include "reset.h"
22 
23 static struct clk_branch turing_wrapper_aon_cbcr = {
24 	.halt_reg = 0x5098,
25 	.halt_check = BRANCH_HALT,
26 	.clkr = {
27 		.enable_reg = 0x5098,
28 		.enable_mask = BIT(0),
29 		.hw.init = &(struct clk_init_data) {
30 			.name = "turing_wrapper_aon_clk",
31 			.ops = &clk_branch2_aon_ops,
32 		},
33 	},
34 };
35 
36 static struct clk_branch turing_q6ss_ahbm_aon_cbcr = {
37 	.halt_reg = 0x9000,
38 	.halt_check = BRANCH_HALT,
39 	.clkr = {
40 		.enable_reg = 0x9000,
41 		.enable_mask = BIT(0),
42 		.hw.init = &(struct clk_init_data) {
43 			.name = "turing_q6ss_ahbm_aon_cbcr",
44 			.ops = &clk_branch2_ops,
45 		},
46 	},
47 };
48 
49 static struct clk_branch turing_q6ss_q6_axim_clk = {
50 	.halt_reg = 0xb000,
51 	.halt_check = BRANCH_HALT,
52 	.clkr = {
53 		.enable_reg = 0xb000,
54 		.enable_mask = BIT(0),
55 		.hw.init = &(struct clk_init_data) {
56 			.name = "turing_q6ss_q6_axim_clk",
57 			.ops = &clk_branch2_aon_ops,
58 		},
59 	},
60 };
61 
62 static struct clk_branch turing_q6ss_ahbs_aon_cbcr = {
63 	.halt_reg = 0x10000,
64 	.halt_check = BRANCH_HALT,
65 	.clkr = {
66 		.enable_reg = 0x10000,
67 		.enable_mask = BIT(0),
68 		.hw.init = &(struct clk_init_data) {
69 			.name = "turing_q6ss_ahbs_aon_clk",
70 			.ops = &clk_branch2_aon_ops,
71 		},
72 	},
73 };
74 
75 static struct clk_branch turing_wrapper_qos_ahbs_aon_cbcr = {
76 	.halt_reg = 0x11014,
77 	.halt_check = BRANCH_HALT,
78 	.clkr = {
79 		.enable_reg = 0x11014,
80 		.enable_mask = BIT(0),
81 		.hw.init = &(struct clk_init_data) {
82 			.name = "turing_wrapper_qos_ahbs_aon_clk",
83 			.ops = &clk_branch2_aon_ops,
84 		},
85 	},
86 };
87 
88 static struct clk_regmap *turingcc_clocks[] = {
89 	[TURING_WRAPPER_AON_CLK] = &turing_wrapper_aon_cbcr.clkr,
90 	[TURING_Q6SS_AHBM_AON_CLK] = &turing_q6ss_ahbm_aon_cbcr.clkr,
91 	[TURING_Q6SS_Q6_AXIM_CLK] = &turing_q6ss_q6_axim_clk.clkr,
92 	[TURING_Q6SS_AHBS_AON_CLK] = &turing_q6ss_ahbs_aon_cbcr.clkr,
93 	[TURING_WRAPPER_QOS_AHBS_AON_CLK] = &turing_wrapper_qos_ahbs_aon_cbcr.clkr,
94 };
95 
96 static const struct regmap_config turingcc_regmap_config = {
97 	.reg_bits	= 32,
98 	.reg_stride	= 4,
99 	.val_bits	= 32,
100 	.max_register	= 0x23004,
101 	.fast_io	= true,
102 };
103 
104 static const struct qcom_cc_desc turingcc_desc = {
105 	.config = &turingcc_regmap_config,
106 	.clks = turingcc_clocks,
107 	.num_clks = ARRAY_SIZE(turingcc_clocks),
108 };
109 
turingcc_probe(struct platform_device * pdev)110 static int turingcc_probe(struct platform_device *pdev)
111 {
112 	int ret;
113 
114 	ret = devm_pm_runtime_enable(&pdev->dev);
115 	if (ret)
116 		return ret;
117 
118 	ret = devm_pm_clk_create(&pdev->dev);
119 	if (ret)
120 		return ret;
121 
122 	ret = pm_clk_add(&pdev->dev, NULL);
123 	if (ret < 0) {
124 		dev_err(&pdev->dev, "failed to acquire iface clock\n");
125 		return ret;
126 	}
127 
128 	ret = pm_runtime_resume_and_get(&pdev->dev);
129 	if (ret)
130 		return ret;
131 
132 	ret = qcom_cc_probe(pdev, &turingcc_desc);
133 	if (ret < 0)
134 		goto err_put_rpm;
135 
136 	pm_runtime_put(&pdev->dev);
137 
138 	return 0;
139 
140 err_put_rpm:
141 	pm_runtime_put_sync(&pdev->dev);
142 
143 	return ret;
144 }
145 
146 static const struct dev_pm_ops turingcc_pm_ops = {
147 	SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
148 };
149 
150 static const struct of_device_id turingcc_match_table[] = {
151 	{ .compatible = "qcom,qcs404-turingcc" },
152 	{ }
153 };
154 MODULE_DEVICE_TABLE(of, turingcc_match_table);
155 
156 static struct platform_driver turingcc_driver = {
157 	.probe		= turingcc_probe,
158 	.driver		= {
159 		.name	= "qcs404-turingcc",
160 		.of_match_table = turingcc_match_table,
161 		.pm = &turingcc_pm_ops,
162 	},
163 };
164 
165 module_platform_driver(turingcc_driver);
166 
167 MODULE_DESCRIPTION("Qualcomm QCS404 Turing Clock Controller");
168 MODULE_LICENSE("GPL v2");
169