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
20struct 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
29struct iris_data {
30	const struct wcnss_vreg_info *vregs;
31	size_t num_vregs;
32
33	bool use_48mhz_xo;
34};
35
36static 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
47static 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
58static 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
69int 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
85disable_regulators:
86	regulator_bulk_disable(iris->num_vregs, iris->vregs);
87
88	return ret;
89}
90
91void 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
97static 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
105static 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
113struct 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
198err_device_del:
199	device_del(&iris->dev);
200
201	return ERR_PTR(ret);
202}
203
204void qcom_iris_remove(struct qcom_iris *iris)
205{
206	device_del(&iris->dev);
207}
208