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.h>
14 #include <linux/of_device.h>
15 #include <linux/platform_device.h>
16 #include <linux/regulator/consumer.h>
17
18 #include "qcom_wcnss.h"
19
20 struct qcom_iris {
21 struct device dev;
22
23 struct clk *xo_clk;
24
25 struct regulator_bulk_data *vregs;
26 size_t num_vregs;
27 };
28
29 struct iris_data {
30 const struct wcnss_vreg_info *vregs;
31 size_t num_vregs;
32
33 bool use_48mhz_xo;
34 };
35
36 static const struct iris_data wcn3620_data = {
37 .vregs = (struct wcnss_vreg_info[]) {
38 { "vddxo", 1800000, 1800000, 10000 },
39 { "vddrfa", 1300000, 1300000, 100000 },
40 { "vddpa", 3300000, 3300000, 515000 },
41 { "vdddig", 1800000, 1800000, 10000 },
42 },
43 .num_vregs = 4,
44 .use_48mhz_xo = false,
45 };
46
47 static const struct iris_data wcn3660_data = {
48 .vregs = (struct wcnss_vreg_info[]) {
49 { "vddxo", 1800000, 1800000, 10000 },
50 { "vddrfa", 1300000, 1300000, 100000 },
51 { "vddpa", 2900000, 3000000, 515000 },
52 { "vdddig", 1200000, 1225000, 10000 },
53 },
54 .num_vregs = 4,
55 .use_48mhz_xo = true,
56 };
57
58 static const struct iris_data wcn3680_data = {
59 .vregs = (struct wcnss_vreg_info[]) {
60 { "vddxo", 1800000, 1800000, 10000 },
61 { "vddrfa", 1300000, 1300000, 100000 },
62 { "vddpa", 3300000, 3300000, 515000 },
63 { "vdddig", 1800000, 1800000, 10000 },
64 },
65 .num_vregs = 4,
66 .use_48mhz_xo = true,
67 };
68
qcom_iris_enable(struct qcom_iris * iris)69 int qcom_iris_enable(struct qcom_iris *iris)
70 {
71 int ret;
72
73 ret = regulator_bulk_enable(iris->num_vregs, iris->vregs);
74 if (ret)
75 return ret;
76
77 ret = clk_prepare_enable(iris->xo_clk);
78 if (ret) {
79 dev_err(&iris->dev, "failed to enable xo clk\n");
80 goto disable_regulators;
81 }
82
83 return 0;
84
85 disable_regulators:
86 regulator_bulk_disable(iris->num_vregs, iris->vregs);
87
88 return ret;
89 }
90
qcom_iris_disable(struct qcom_iris * iris)91 void qcom_iris_disable(struct qcom_iris *iris)
92 {
93 clk_disable_unprepare(iris->xo_clk);
94 regulator_bulk_disable(iris->num_vregs, iris->vregs);
95 }
96
97 static const struct of_device_id iris_of_match[] = {
98 { .compatible = "qcom,wcn3620", .data = &wcn3620_data },
99 { .compatible = "qcom,wcn3660", .data = &wcn3660_data },
100 { .compatible = "qcom,wcn3660b", .data = &wcn3680_data },
101 { .compatible = "qcom,wcn3680", .data = &wcn3680_data },
102 {}
103 };
104
qcom_iris_release(struct device * dev)105 static void qcom_iris_release(struct device *dev)
106 {
107 struct qcom_iris *iris = container_of(dev, struct qcom_iris, dev);
108
109 of_node_put(iris->dev.of_node);
110 kfree(iris);
111 }
112
qcom_iris_probe(struct device * parent,bool * use_48mhz_xo)113 struct qcom_iris *qcom_iris_probe(struct device *parent, bool *use_48mhz_xo)
114 {
115 const struct of_device_id *match;
116 const struct iris_data *data;
117 struct device_node *of_node;
118 struct qcom_iris *iris;
119 int ret;
120 int i;
121
122 of_node = of_get_child_by_name(parent->of_node, "iris");
123 if (!of_node) {
124 dev_err(parent, "No child node \"iris\" found\n");
125 return ERR_PTR(-EINVAL);
126 }
127
128 iris = kzalloc(sizeof(*iris), GFP_KERNEL);
129 if (!iris) {
130 of_node_put(of_node);
131 return ERR_PTR(-ENOMEM);
132 }
133
134 device_initialize(&iris->dev);
135 iris->dev.parent = parent;
136 iris->dev.release = qcom_iris_release;
137 iris->dev.of_node = of_node;
138
139 dev_set_name(&iris->dev, "%s.iris", dev_name(parent));
140
141 ret = device_add(&iris->dev);
142 if (ret) {
143 put_device(&iris->dev);
144 return ERR_PTR(ret);
145 }
146
147 match = of_match_device(iris_of_match, &iris->dev);
148 if (!match) {
149 dev_err(&iris->dev, "no matching compatible for iris\n");
150 ret = -EINVAL;
151 goto err_device_del;
152 }
153
154 data = match->data;
155
156 iris->xo_clk = devm_clk_get(&iris->dev, "xo");
157 if (IS_ERR(iris->xo_clk)) {
158 ret = PTR_ERR(iris->xo_clk);
159 if (ret != -EPROBE_DEFER)
160 dev_err(&iris->dev, "failed to acquire xo clk\n");
161 goto err_device_del;
162 }
163
164 iris->num_vregs = data->num_vregs;
165 iris->vregs = devm_kcalloc(&iris->dev,
166 iris->num_vregs,
167 sizeof(struct regulator_bulk_data),
168 GFP_KERNEL);
169 if (!iris->vregs) {
170 ret = -ENOMEM;
171 goto err_device_del;
172 }
173
174 for (i = 0; i < iris->num_vregs; i++)
175 iris->vregs[i].supply = data->vregs[i].name;
176
177 ret = devm_regulator_bulk_get(&iris->dev, iris->num_vregs, iris->vregs);
178 if (ret) {
179 dev_err(&iris->dev, "failed to get regulators\n");
180 goto err_device_del;
181 }
182
183 for (i = 0; i < iris->num_vregs; i++) {
184 if (data->vregs[i].max_voltage)
185 regulator_set_voltage(iris->vregs[i].consumer,
186 data->vregs[i].min_voltage,
187 data->vregs[i].max_voltage);
188
189 if (data->vregs[i].load_uA)
190 regulator_set_load(iris->vregs[i].consumer,
191 data->vregs[i].load_uA);
192 }
193
194 *use_48mhz_xo = data->use_48mhz_xo;
195
196 return iris;
197
198 err_device_del:
199 device_del(&iris->dev);
200
201 return ERR_PTR(ret);
202 }
203
qcom_iris_remove(struct qcom_iris * iris)204 void qcom_iris_remove(struct qcom_iris *iris)
205 {
206 device_del(&iris->dev);
207 }
208