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 = dev_err_probe(&iris->dev, PTR_ERR(iris->xo_clk),
159				    "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}