1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2020, The Linux Foundation. All rights reserved.
4 */
5
6 #include <linux/clk-provider.h>
7 #include <linux/platform_device.h>
8 #include <linux/module.h>
9 #include <linux/pm_clock.h>
10 #include <linux/pm_runtime.h>
11 #include <linux/regmap.h>
12
13 #include <dt-bindings/clock/qcom,mss-sc7180.h>
14
15 #include "clk-regmap.h"
16 #include "clk-branch.h"
17 #include "common.h"
18
19 static struct clk_branch mss_axi_nav_clk = {
20 .halt_reg = 0x20bc,
21 .halt_check = BRANCH_HALT,
22 .clkr = {
23 .enable_reg = 0x20bc,
24 .enable_mask = BIT(0),
25 .hw.init = &(struct clk_init_data){
26 .name = "mss_axi_nav_clk",
27 .parent_data = &(const struct clk_parent_data){
28 .fw_name = "gcc_mss_nav_axi",
29 },
30 .num_parents = 1,
31 .ops = &clk_branch2_ops,
32 },
33 },
34 };
35
36 static struct clk_branch mss_axi_crypto_clk = {
37 .halt_reg = 0x20cc,
38 .halt_check = BRANCH_HALT,
39 .clkr = {
40 .enable_reg = 0x20cc,
41 .enable_mask = BIT(0),
42 .hw.init = &(struct clk_init_data){
43 .name = "mss_axi_crypto_clk",
44 .parent_data = &(const struct clk_parent_data){
45 .fw_name = "gcc_mss_mfab_axis",
46 },
47 .num_parents = 1,
48 .ops = &clk_branch2_ops,
49 },
50 },
51 };
52
53 static const struct regmap_config mss_regmap_config = {
54 .reg_bits = 32,
55 .reg_stride = 4,
56 .val_bits = 32,
57 .fast_io = true,
58 .max_register = 0x41aa0cc,
59 };
60
61 static struct clk_regmap *mss_sc7180_clocks[] = {
62 [MSS_AXI_CRYPTO_CLK] = &mss_axi_crypto_clk.clkr,
63 [MSS_AXI_NAV_CLK] = &mss_axi_nav_clk.clkr,
64 };
65
66 static const struct qcom_cc_desc mss_sc7180_desc = {
67 .config = &mss_regmap_config,
68 .clks = mss_sc7180_clocks,
69 .num_clks = ARRAY_SIZE(mss_sc7180_clocks),
70 };
71
mss_sc7180_probe(struct platform_device * pdev)72 static int mss_sc7180_probe(struct platform_device *pdev)
73 {
74 int ret;
75
76 ret = devm_pm_runtime_enable(&pdev->dev);
77 if (ret)
78 return ret;
79
80 ret = devm_pm_clk_create(&pdev->dev);
81 if (ret)
82 return ret;
83
84 ret = pm_clk_add(&pdev->dev, "cfg_ahb");
85 if (ret < 0) {
86 dev_err(&pdev->dev, "failed to acquire iface clock\n");
87 return ret;
88 }
89
90 ret = pm_runtime_resume_and_get(&pdev->dev);
91 if (ret)
92 return ret;
93
94 ret = qcom_cc_probe(pdev, &mss_sc7180_desc);
95 if (ret < 0)
96 goto err_put_rpm;
97
98 pm_runtime_put(&pdev->dev);
99
100 return 0;
101
102 err_put_rpm:
103 pm_runtime_put_sync(&pdev->dev);
104
105 return ret;
106 }
107
108 static const struct dev_pm_ops mss_sc7180_pm_ops = {
109 SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
110 };
111
112 static const struct of_device_id mss_sc7180_match_table[] = {
113 { .compatible = "qcom,sc7180-mss" },
114 { }
115 };
116 MODULE_DEVICE_TABLE(of, mss_sc7180_match_table);
117
118 static struct platform_driver mss_sc7180_driver = {
119 .probe = mss_sc7180_probe,
120 .driver = {
121 .name = "sc7180-mss",
122 .of_match_table = mss_sc7180_match_table,
123 .pm = &mss_sc7180_pm_ops,
124 },
125 };
126
mss_sc7180_init(void)127 static int __init mss_sc7180_init(void)
128 {
129 return platform_driver_register(&mss_sc7180_driver);
130 }
131 subsys_initcall(mss_sc7180_init);
132
mss_sc7180_exit(void)133 static void __exit mss_sc7180_exit(void)
134 {
135 platform_driver_unregister(&mss_sc7180_driver);
136 }
137 module_exit(mss_sc7180_exit);
138
139 MODULE_DESCRIPTION("QTI MSS SC7180 Driver");
140 MODULE_LICENSE("GPL v2");
141