1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Qualcomm Wireless Connectivity Subsystem Iris driver
4  *
5  * Copyright (C) 2016 Linaro Ltd
6  * Copyright (C) 2014 Sony Mobile Communications AB
7  * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
8  */
9 
10 #include <linux/clk.h>
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/of_device.h>
14 #include <linux/platform_device.h>
15 #include <linux/regulator/consumer.h>
16 
17 #include "qcom_wcnss.h"
18 
19 struct qcom_iris {
20 	struct device *dev;
21 
22 	struct clk *xo_clk;
23 
24 	struct regulator_bulk_data *vregs;
25 	size_t num_vregs;
26 };
27 
28 struct iris_data {
29 	const struct wcnss_vreg_info *vregs;
30 	size_t num_vregs;
31 
32 	bool use_48mhz_xo;
33 };
34 
35 static const struct iris_data wcn3620_data = {
36 	.vregs = (struct wcnss_vreg_info[]) {
37 		{ "vddxo",  1800000, 1800000, 10000 },
38 		{ "vddrfa", 1300000, 1300000, 100000 },
39 		{ "vddpa",  3300000, 3300000, 515000 },
40 		{ "vdddig", 1800000, 1800000, 10000 },
41 	},
42 	.num_vregs = 4,
43 	.use_48mhz_xo = false,
44 };
45 
46 static const struct iris_data wcn3660_data = {
47 	.vregs = (struct wcnss_vreg_info[]) {
48 		{ "vddxo",  1800000, 1800000, 10000 },
49 		{ "vddrfa", 1300000, 1300000, 100000 },
50 		{ "vddpa",  2900000, 3000000, 515000 },
51 		{ "vdddig", 1200000, 1225000, 10000 },
52 	},
53 	.num_vregs = 4,
54 	.use_48mhz_xo = true,
55 };
56 
57 static const struct iris_data wcn3680_data = {
58 	.vregs = (struct wcnss_vreg_info[]) {
59 		{ "vddxo",  1800000, 1800000, 10000 },
60 		{ "vddrfa", 1300000, 1300000, 100000 },
61 		{ "vddpa",  3300000, 3300000, 515000 },
62 		{ "vdddig", 1800000, 1800000, 10000 },
63 	},
64 	.num_vregs = 4,
65 	.use_48mhz_xo = true,
66 };
67 
68 int qcom_iris_enable(struct qcom_iris *iris)
69 {
70 	int ret;
71 
72 	ret = regulator_bulk_enable(iris->num_vregs, iris->vregs);
73 	if (ret)
74 		return ret;
75 
76 	ret = clk_prepare_enable(iris->xo_clk);
77 	if (ret) {
78 		dev_err(iris->dev, "failed to enable xo clk\n");
79 		goto disable_regulators;
80 	}
81 
82 	return 0;
83 
84 disable_regulators:
85 	regulator_bulk_disable(iris->num_vregs, iris->vregs);
86 
87 	return ret;
88 }
89 
90 void qcom_iris_disable(struct qcom_iris *iris)
91 {
92 	clk_disable_unprepare(iris->xo_clk);
93 	regulator_bulk_disable(iris->num_vregs, iris->vregs);
94 }
95 
96 static int qcom_iris_probe(struct platform_device *pdev)
97 {
98 	const struct iris_data *data;
99 	struct qcom_wcnss *wcnss;
100 	struct qcom_iris *iris;
101 	int ret;
102 	int i;
103 
104 	iris = devm_kzalloc(&pdev->dev, sizeof(struct qcom_iris), GFP_KERNEL);
105 	if (!iris)
106 		return -ENOMEM;
107 
108 	data = of_device_get_match_data(&pdev->dev);
109 	wcnss = dev_get_drvdata(pdev->dev.parent);
110 
111 	iris->xo_clk = devm_clk_get(&pdev->dev, "xo");
112 	if (IS_ERR(iris->xo_clk)) {
113 		if (PTR_ERR(iris->xo_clk) != -EPROBE_DEFER)
114 			dev_err(&pdev->dev, "failed to acquire xo clk\n");
115 		return PTR_ERR(iris->xo_clk);
116 	}
117 
118 	iris->num_vregs = data->num_vregs;
119 	iris->vregs = devm_kcalloc(&pdev->dev,
120 				   iris->num_vregs,
121 				   sizeof(struct regulator_bulk_data),
122 				   GFP_KERNEL);
123 	if (!iris->vregs)
124 		return -ENOMEM;
125 
126 	for (i = 0; i < iris->num_vregs; i++)
127 		iris->vregs[i].supply = data->vregs[i].name;
128 
129 	ret = devm_regulator_bulk_get(&pdev->dev, iris->num_vregs, iris->vregs);
130 	if (ret) {
131 		dev_err(&pdev->dev, "failed to get regulators\n");
132 		return ret;
133 	}
134 
135 	for (i = 0; i < iris->num_vregs; i++) {
136 		if (data->vregs[i].max_voltage)
137 			regulator_set_voltage(iris->vregs[i].consumer,
138 					      data->vregs[i].min_voltage,
139 					      data->vregs[i].max_voltage);
140 
141 		if (data->vregs[i].load_uA)
142 			regulator_set_load(iris->vregs[i].consumer,
143 					   data->vregs[i].load_uA);
144 	}
145 
146 	qcom_wcnss_assign_iris(wcnss, iris, data->use_48mhz_xo);
147 
148 	return 0;
149 }
150 
151 static int qcom_iris_remove(struct platform_device *pdev)
152 {
153 	struct qcom_wcnss *wcnss = dev_get_drvdata(pdev->dev.parent);
154 
155 	qcom_wcnss_assign_iris(wcnss, NULL, false);
156 
157 	return 0;
158 }
159 
160 static const struct of_device_id iris_of_match[] = {
161 	{ .compatible = "qcom,wcn3620", .data = &wcn3620_data },
162 	{ .compatible = "qcom,wcn3660", .data = &wcn3660_data },
163 	{ .compatible = "qcom,wcn3680", .data = &wcn3680_data },
164 	{}
165 };
166 MODULE_DEVICE_TABLE(of, iris_of_match);
167 
168 struct platform_driver qcom_iris_driver = {
169 	.probe = qcom_iris_probe,
170 	.remove = qcom_iris_remove,
171 	.driver = {
172 		.name = "qcom-iris",
173 		.of_match_table = iris_of_match,
174 	},
175 };
176