xref: /openbmc/linux/drivers/clk/qcom/mss-sc7180.c (revision 0d3b051a)
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 
72 static int mss_sc7180_probe(struct platform_device *pdev)
73 {
74 	int ret;
75 
76 	pm_runtime_enable(&pdev->dev);
77 	ret = pm_clk_create(&pdev->dev);
78 	if (ret)
79 		goto disable_pm_runtime;
80 
81 	ret = pm_clk_add(&pdev->dev, "cfg_ahb");
82 	if (ret < 0) {
83 		dev_err(&pdev->dev, "failed to acquire iface clock\n");
84 		goto destroy_pm_clk;
85 	}
86 
87 	ret = qcom_cc_probe(pdev, &mss_sc7180_desc);
88 	if (ret < 0)
89 		goto destroy_pm_clk;
90 
91 	return 0;
92 
93 destroy_pm_clk:
94 	pm_clk_destroy(&pdev->dev);
95 
96 disable_pm_runtime:
97 	pm_runtime_disable(&pdev->dev);
98 
99 	return ret;
100 }
101 
102 static int mss_sc7180_remove(struct platform_device *pdev)
103 {
104 	pm_clk_destroy(&pdev->dev);
105 	pm_runtime_disable(&pdev->dev);
106 
107 	return 0;
108 }
109 
110 static const struct dev_pm_ops mss_sc7180_pm_ops = {
111 	SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
112 };
113 
114 static const struct of_device_id mss_sc7180_match_table[] = {
115 	{ .compatible = "qcom,sc7180-mss" },
116 	{ }
117 };
118 MODULE_DEVICE_TABLE(of, mss_sc7180_match_table);
119 
120 static struct platform_driver mss_sc7180_driver = {
121 	.probe		= mss_sc7180_probe,
122 	.remove		= mss_sc7180_remove,
123 	.driver		= {
124 		.name		= "sc7180-mss",
125 		.of_match_table = mss_sc7180_match_table,
126 		.pm = &mss_sc7180_pm_ops,
127 	},
128 };
129 
130 static int __init mss_sc7180_init(void)
131 {
132 	return platform_driver_register(&mss_sc7180_driver);
133 }
134 subsys_initcall(mss_sc7180_init);
135 
136 static void __exit mss_sc7180_exit(void)
137 {
138 	platform_driver_unregister(&mss_sc7180_driver);
139 }
140 module_exit(mss_sc7180_exit);
141 
142 MODULE_DESCRIPTION("QTI MSS SC7180 Driver");
143 MODULE_LICENSE("GPL v2");
144