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
qcom_iris_enable(struct qcom_iris * iris)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
qcom_iris_disable(struct qcom_iris * iris)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 const struct of_device_id iris_of_match[] = {
97 { .compatible = "qcom,wcn3620", .data = &wcn3620_data },
98 { .compatible = "qcom,wcn3660", .data = &wcn3660_data },
99 { .compatible = "qcom,wcn3660b", .data = &wcn3680_data },
100 { .compatible = "qcom,wcn3680", .data = &wcn3680_data },
101 {}
102 };
103
qcom_iris_release(struct device * dev)104 static void qcom_iris_release(struct device *dev)
105 {
106 struct qcom_iris *iris = container_of(dev, struct qcom_iris, dev);
107
108 of_node_put(iris->dev.of_node);
109 kfree(iris);
110 }
111
qcom_iris_probe(struct device * parent,bool * use_48mhz_xo)112 struct qcom_iris *qcom_iris_probe(struct device *parent, bool *use_48mhz_xo)
113 {
114 const struct of_device_id *match;
115 const struct iris_data *data;
116 struct device_node *of_node;
117 struct qcom_iris *iris;
118 int ret;
119 int i;
120
121 of_node = of_get_child_by_name(parent->of_node, "iris");
122 if (!of_node) {
123 dev_err(parent, "No child node \"iris\" found\n");
124 return ERR_PTR(-EINVAL);
125 }
126
127 iris = kzalloc(sizeof(*iris), GFP_KERNEL);
128 if (!iris) {
129 of_node_put(of_node);
130 return ERR_PTR(-ENOMEM);
131 }
132
133 device_initialize(&iris->dev);
134 iris->dev.parent = parent;
135 iris->dev.release = qcom_iris_release;
136 iris->dev.of_node = of_node;
137
138 dev_set_name(&iris->dev, "%s.iris", dev_name(parent));
139
140 ret = device_add(&iris->dev);
141 if (ret) {
142 put_device(&iris->dev);
143 return ERR_PTR(ret);
144 }
145
146 match = of_match_device(iris_of_match, &iris->dev);
147 if (!match) {
148 dev_err(&iris->dev, "no matching compatible for iris\n");
149 ret = -EINVAL;
150 goto err_device_del;
151 }
152
153 data = match->data;
154
155 iris->xo_clk = devm_clk_get(&iris->dev, "xo");
156 if (IS_ERR(iris->xo_clk)) {
157 ret = PTR_ERR(iris->xo_clk);
158 if (ret != -EPROBE_DEFER)
159 dev_err(&iris->dev, "failed to acquire xo clk\n");
160 goto err_device_del;
161 }
162
163 iris->num_vregs = data->num_vregs;
164 iris->vregs = devm_kcalloc(&iris->dev,
165 iris->num_vregs,
166 sizeof(struct regulator_bulk_data),
167 GFP_KERNEL);
168 if (!iris->vregs) {
169 ret = -ENOMEM;
170 goto err_device_del;
171 }
172
173 for (i = 0; i < iris->num_vregs; i++)
174 iris->vregs[i].supply = data->vregs[i].name;
175
176 ret = devm_regulator_bulk_get(&iris->dev, iris->num_vregs, iris->vregs);
177 if (ret) {
178 dev_err(&iris->dev, "failed to get regulators\n");
179 goto err_device_del;
180 }
181
182 for (i = 0; i < iris->num_vregs; i++) {
183 if (data->vregs[i].max_voltage)
184 regulator_set_voltage(iris->vregs[i].consumer,
185 data->vregs[i].min_voltage,
186 data->vregs[i].max_voltage);
187
188 if (data->vregs[i].load_uA)
189 regulator_set_load(iris->vregs[i].consumer,
190 data->vregs[i].load_uA);
191 }
192
193 *use_48mhz_xo = data->use_48mhz_xo;
194
195 return iris;
196
197 err_device_del:
198 device_del(&iris->dev);
199
200 return ERR_PTR(ret);
201 }
202
qcom_iris_remove(struct qcom_iris * iris)203 void qcom_iris_remove(struct qcom_iris *iris)
204 {
205 device_del(&iris->dev);
206 }
207