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
 19struct 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
 28struct iris_data {
 29	const struct wcnss_vreg_info *vregs;
 30	size_t num_vregs;
 31
 32	bool use_48mhz_xo;
 33};
 34
 35static 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
 46static 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
 57static 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
 68int 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
 84disable_regulators:
 85	regulator_bulk_disable(iris->num_vregs, iris->vregs);
 86
 87	return ret;
 88}
 89
 90void 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
 96static 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
104static 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
112struct 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
197err_device_del:
198	device_del(&iris->dev);
199
200	return ERR_PTR(ret);
201}
202
203void qcom_iris_remove(struct qcom_iris *iris)
204{
205	device_del(&iris->dev);
206}