1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2019, Linaro Ltd.
4 */
5
6 #include <linux/bitops.h>
7 #include <linux/err.h>
8 #include <linux/platform_device.h>
9 #include <linux/module.h>
10 #include <linux/of_address.h>
11 #include <linux/pm_clock.h>
12 #include <linux/pm_runtime.h>
13 #include <linux/regmap.h>
14
15 #include <dt-bindings/clock/qcom,turingcc-qcs404.h>
16
17 #include "clk-regmap.h"
18 #include "clk-branch.h"
19 #include "common.h"
20 #include "reset.h"
21
22 static struct clk_branch turing_wrapper_aon_cbcr = {
23 .halt_reg = 0x5098,
24 .halt_check = BRANCH_HALT,
25 .clkr = {
26 .enable_reg = 0x5098,
27 .enable_mask = BIT(0),
28 .hw.init = &(struct clk_init_data) {
29 .name = "turing_wrapper_aon_clk",
30 .ops = &clk_branch2_aon_ops,
31 },
32 },
33 };
34
35 static struct clk_branch turing_q6ss_ahbm_aon_cbcr = {
36 .halt_reg = 0x9000,
37 .halt_check = BRANCH_HALT,
38 .clkr = {
39 .enable_reg = 0x9000,
40 .enable_mask = BIT(0),
41 .hw.init = &(struct clk_init_data) {
42 .name = "turing_q6ss_ahbm_aon_cbcr",
43 .ops = &clk_branch2_ops,
44 },
45 },
46 };
47
48 static struct clk_branch turing_q6ss_q6_axim_clk = {
49 .halt_reg = 0xb000,
50 .halt_check = BRANCH_HALT,
51 .clkr = {
52 .enable_reg = 0xb000,
53 .enable_mask = BIT(0),
54 .hw.init = &(struct clk_init_data) {
55 .name = "turing_q6ss_q6_axim_clk",
56 .ops = &clk_branch2_aon_ops,
57 },
58 },
59 };
60
61 static struct clk_branch turing_q6ss_ahbs_aon_cbcr = {
62 .halt_reg = 0x10000,
63 .halt_check = BRANCH_HALT,
64 .clkr = {
65 .enable_reg = 0x10000,
66 .enable_mask = BIT(0),
67 .hw.init = &(struct clk_init_data) {
68 .name = "turing_q6ss_ahbs_aon_clk",
69 .ops = &clk_branch2_aon_ops,
70 },
71 },
72 };
73
74 static struct clk_branch turing_wrapper_qos_ahbs_aon_cbcr = {
75 .halt_reg = 0x11014,
76 .halt_check = BRANCH_HALT,
77 .clkr = {
78 .enable_reg = 0x11014,
79 .enable_mask = BIT(0),
80 .hw.init = &(struct clk_init_data) {
81 .name = "turing_wrapper_qos_ahbs_aon_clk",
82 .ops = &clk_branch2_aon_ops,
83 },
84 },
85 };
86
87 static struct clk_regmap *turingcc_clocks[] = {
88 [TURING_WRAPPER_AON_CLK] = &turing_wrapper_aon_cbcr.clkr,
89 [TURING_Q6SS_AHBM_AON_CLK] = &turing_q6ss_ahbm_aon_cbcr.clkr,
90 [TURING_Q6SS_Q6_AXIM_CLK] = &turing_q6ss_q6_axim_clk.clkr,
91 [TURING_Q6SS_AHBS_AON_CLK] = &turing_q6ss_ahbs_aon_cbcr.clkr,
92 [TURING_WRAPPER_QOS_AHBS_AON_CLK] = &turing_wrapper_qos_ahbs_aon_cbcr.clkr,
93 };
94
95 static const struct regmap_config turingcc_regmap_config = {
96 .reg_bits = 32,
97 .reg_stride = 4,
98 .val_bits = 32,
99 .max_register = 0x23004,
100 .fast_io = true,
101 };
102
103 static const struct qcom_cc_desc turingcc_desc = {
104 .config = &turingcc_regmap_config,
105 .clks = turingcc_clocks,
106 .num_clks = ARRAY_SIZE(turingcc_clocks),
107 };
108
turingcc_probe(struct platform_device * pdev)109 static int turingcc_probe(struct platform_device *pdev)
110 {
111 int ret;
112
113 pm_runtime_enable(&pdev->dev);
114 ret = pm_clk_create(&pdev->dev);
115 if (ret)
116 goto disable_pm_runtime;
117
118 ret = pm_clk_add(&pdev->dev, NULL);
119 if (ret < 0) {
120 dev_err(&pdev->dev, "failed to acquire iface clock\n");
121 goto destroy_pm_clk;
122 }
123
124 ret = qcom_cc_probe(pdev, &turingcc_desc);
125 if (ret < 0)
126 goto destroy_pm_clk;
127
128 return 0;
129
130 destroy_pm_clk:
131 pm_clk_destroy(&pdev->dev);
132
133 disable_pm_runtime:
134 pm_runtime_disable(&pdev->dev);
135
136 return ret;
137 }
138
turingcc_remove(struct platform_device * pdev)139 static int turingcc_remove(struct platform_device *pdev)
140 {
141 pm_clk_destroy(&pdev->dev);
142 pm_runtime_disable(&pdev->dev);
143
144 return 0;
145 }
146
147 static const struct dev_pm_ops turingcc_pm_ops = {
148 SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
149 };
150
151 static const struct of_device_id turingcc_match_table[] = {
152 { .compatible = "qcom,qcs404-turingcc" },
153 { }
154 };
155 MODULE_DEVICE_TABLE(of, turingcc_match_table);
156
157 static struct platform_driver turingcc_driver = {
158 .probe = turingcc_probe,
159 .remove = turingcc_remove,
160 .driver = {
161 .name = "qcs404-turingcc",
162 .of_match_table = turingcc_match_table,
163 .pm = &turingcc_pm_ops,
164 },
165 };
166
167 module_platform_driver(turingcc_driver);
168
169 MODULE_DESCRIPTION("Qualcomm QCS404 Turing Clock Controller");
170 MODULE_LICENSE("GPL v2");
171