1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2018, The Linux Foundation. All rights reserved.
4  */
5 
6 #include <linux/bitops.h>
7 #include <linux/err.h>
8 #include <linux/module.h>
9 #include <linux/platform_device.h>
10 #include <linux/pm_clock.h>
11 #include <linux/pm_runtime.h>
12 #include <linux/regmap.h>
13 
14 #include <dt-bindings/clock/qcom,q6sstopcc-qcs404.h>
15 
16 #include "clk-regmap.h"
17 #include "clk-branch.h"
18 #include "common.h"
19 #include "reset.h"
20 
21 static struct clk_branch lcc_ahbfabric_cbc_clk = {
22 	.halt_reg = 0x1b004,
23 	.halt_check = BRANCH_HALT,
24 	.clkr = {
25 		.enable_reg = 0x1b004,
26 		.enable_mask = BIT(0),
27 		.hw.init = &(struct clk_init_data){
28 			.name = "lcc_ahbfabric_cbc_clk",
29 			.ops = &clk_branch2_ops,
30 		},
31 	},
32 };
33 
34 static struct clk_branch lcc_q6ss_ahbs_cbc_clk = {
35 	.halt_reg = 0x22000,
36 	.halt_check = BRANCH_VOTED,
37 	.clkr = {
38 		.enable_reg = 0x22000,
39 		.enable_mask = BIT(0),
40 		.hw.init = &(struct clk_init_data){
41 			.name = "lcc_q6ss_ahbs_cbc_clk",
42 			.ops = &clk_branch2_ops,
43 		},
44 	},
45 };
46 
47 static struct clk_branch lcc_q6ss_tcm_slave_cbc_clk = {
48 	.halt_reg = 0x1c000,
49 	.halt_check = BRANCH_VOTED,
50 	.clkr = {
51 		.enable_reg = 0x1c000,
52 		.enable_mask = BIT(0),
53 		.hw.init = &(struct clk_init_data){
54 			.name = "lcc_q6ss_tcm_slave_cbc_clk",
55 			.ops = &clk_branch2_ops,
56 		},
57 	},
58 };
59 
60 static struct clk_branch lcc_q6ss_ahbm_cbc_clk = {
61 	.halt_reg = 0x22004,
62 	.halt_check = BRANCH_VOTED,
63 	.clkr = {
64 		.enable_reg = 0x22004,
65 		.enable_mask = BIT(0),
66 		.hw.init = &(struct clk_init_data){
67 			.name = "lcc_q6ss_ahbm_cbc_clk",
68 			.ops = &clk_branch2_ops,
69 		},
70 	},
71 };
72 
73 static struct clk_branch lcc_q6ss_axim_cbc_clk = {
74 	.halt_reg = 0x1c004,
75 	.halt_check = BRANCH_VOTED,
76 	.clkr = {
77 		.enable_reg = 0x1c004,
78 		.enable_mask = BIT(0),
79 		.hw.init = &(struct clk_init_data){
80 			.name = "lcc_q6ss_axim_cbc_clk",
81 			.ops = &clk_branch2_ops,
82 		},
83 	},
84 };
85 
86 static struct clk_branch lcc_q6ss_bcr_sleep_clk = {
87 	.halt_reg = 0x6004,
88 	.halt_check = BRANCH_VOTED,
89 	.clkr = {
90 		.enable_reg = 0x6004,
91 		.enable_mask = BIT(0),
92 		.hw.init = &(struct clk_init_data){
93 			.name = "lcc_q6ss_bcr_sleep_clk",
94 			.ops = &clk_branch2_ops,
95 		},
96 	},
97 };
98 
99 /* TCSR clock */
100 static struct clk_branch tcsr_lcc_csr_cbcr_clk = {
101 	.halt_reg = 0x8008,
102 	.halt_check = BRANCH_VOTED,
103 	.clkr = {
104 		.enable_reg = 0x8008,
105 		.enable_mask = BIT(0),
106 		.hw.init = &(struct clk_init_data){
107 			.name = "tcsr_lcc_csr_cbcr_clk",
108 			.ops = &clk_branch2_ops,
109 		},
110 	},
111 };
112 
113 static struct regmap_config q6sstop_regmap_config = {
114 	.reg_bits	= 32,
115 	.reg_stride	= 4,
116 	.val_bits	= 32,
117 	.fast_io	= true,
118 };
119 
120 static struct clk_regmap *q6sstop_qcs404_clocks[] = {
121 	[LCC_AHBFABRIC_CBC_CLK] = &lcc_ahbfabric_cbc_clk.clkr,
122 	[LCC_Q6SS_AHBS_CBC_CLK] = &lcc_q6ss_ahbs_cbc_clk.clkr,
123 	[LCC_Q6SS_TCM_SLAVE_CBC_CLK] = &lcc_q6ss_tcm_slave_cbc_clk.clkr,
124 	[LCC_Q6SS_AHBM_CBC_CLK] = &lcc_q6ss_ahbm_cbc_clk.clkr,
125 	[LCC_Q6SS_AXIM_CBC_CLK] = &lcc_q6ss_axim_cbc_clk.clkr,
126 	[LCC_Q6SS_BCR_SLEEP_CLK] = &lcc_q6ss_bcr_sleep_clk.clkr,
127 };
128 
129 static const struct qcom_reset_map q6sstop_qcs404_resets[] = {
130 	[Q6SSTOP_BCR_RESET] = { 0x6000 },
131 };
132 
133 static const struct qcom_cc_desc q6sstop_qcs404_desc = {
134 	.config = &q6sstop_regmap_config,
135 	.clks = q6sstop_qcs404_clocks,
136 	.num_clks = ARRAY_SIZE(q6sstop_qcs404_clocks),
137 	.resets = q6sstop_qcs404_resets,
138 	.num_resets = ARRAY_SIZE(q6sstop_qcs404_resets),
139 };
140 
141 static struct clk_regmap *tcsr_qcs404_clocks[] = {
142 	[TCSR_Q6SS_LCC_CBCR_CLK] = &tcsr_lcc_csr_cbcr_clk.clkr,
143 };
144 
145 static const struct qcom_cc_desc tcsr_qcs404_desc = {
146 	.config = &q6sstop_regmap_config,
147 	.clks = tcsr_qcs404_clocks,
148 	.num_clks = ARRAY_SIZE(tcsr_qcs404_clocks),
149 };
150 
151 static const struct of_device_id q6sstopcc_qcs404_match_table[] = {
152 	{ .compatible = "qcom,qcs404-q6sstopcc" },
153 	{ }
154 };
155 MODULE_DEVICE_TABLE(of, q6sstopcc_qcs404_match_table);
156 
157 static int q6sstopcc_qcs404_probe(struct platform_device *pdev)
158 {
159 	const struct qcom_cc_desc *desc;
160 	int ret;
161 
162 	pm_runtime_enable(&pdev->dev);
163 	ret = pm_clk_create(&pdev->dev);
164 	if (ret)
165 		goto disable_pm_runtime;
166 
167 	ret = pm_clk_add(&pdev->dev, NULL);
168 	if (ret < 0) {
169 		dev_err(&pdev->dev, "failed to acquire iface clock\n");
170 		goto destroy_pm_clk;
171 	}
172 
173 	q6sstop_regmap_config.name = "q6sstop_tcsr";
174 	desc = &tcsr_qcs404_desc;
175 
176 	ret = qcom_cc_probe_by_index(pdev, 1, desc);
177 	if (ret)
178 		goto destroy_pm_clk;
179 
180 	q6sstop_regmap_config.name = "q6sstop_cc";
181 	desc = &q6sstop_qcs404_desc;
182 
183 	ret = qcom_cc_probe_by_index(pdev, 0, desc);
184 	if (ret)
185 		goto destroy_pm_clk;
186 
187 	return 0;
188 
189 destroy_pm_clk:
190 	pm_clk_destroy(&pdev->dev);
191 
192 disable_pm_runtime:
193 	pm_runtime_disable(&pdev->dev);
194 
195 	return ret;
196 }
197 
198 static int q6sstopcc_qcs404_remove(struct platform_device *pdev)
199 {
200 	pm_clk_destroy(&pdev->dev);
201 	pm_runtime_disable(&pdev->dev);
202 
203 	return 0;
204 }
205 
206 static const struct dev_pm_ops q6sstopcc_pm_ops = {
207 	SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
208 };
209 
210 static struct platform_driver q6sstopcc_qcs404_driver = {
211 	.probe		= q6sstopcc_qcs404_probe,
212 	.remove		= q6sstopcc_qcs404_remove,
213 	.driver		= {
214 		.name	= "qcs404-q6sstopcc",
215 		.of_match_table = q6sstopcc_qcs404_match_table,
216 		.pm = &q6sstopcc_pm_ops,
217 	},
218 };
219 
220 module_platform_driver(q6sstopcc_qcs404_driver);
221 
222 MODULE_DESCRIPTION("QTI QCS404 Q6SSTOP Clock Controller Driver");
223 MODULE_LICENSE("GPL v2");
224