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 int qcom_iris_probe(struct platform_device *pdev)
 97{
 98	const struct iris_data *data;
 99	struct qcom_wcnss *wcnss;
100	struct qcom_iris *iris;
101	int ret;
102	int i;
103
104	iris = devm_kzalloc(&pdev->dev, sizeof(struct qcom_iris), GFP_KERNEL);
105	if (!iris)
106		return -ENOMEM;
107
108	data = of_device_get_match_data(&pdev->dev);
109	wcnss = dev_get_drvdata(pdev->dev.parent);
110
111	iris->xo_clk = devm_clk_get(&pdev->dev, "xo");
112	if (IS_ERR(iris->xo_clk)) {
113		if (PTR_ERR(iris->xo_clk) != -EPROBE_DEFER)
114			dev_err(&pdev->dev, "failed to acquire xo clk\n");
115		return PTR_ERR(iris->xo_clk);
116	}
117
118	iris->num_vregs = data->num_vregs;
119	iris->vregs = devm_kcalloc(&pdev->dev,
120				   iris->num_vregs,
121				   sizeof(struct regulator_bulk_data),
122				   GFP_KERNEL);
123	if (!iris->vregs)
124		return -ENOMEM;
125
126	for (i = 0; i < iris->num_vregs; i++)
127		iris->vregs[i].supply = data->vregs[i].name;
128
129	ret = devm_regulator_bulk_get(&pdev->dev, iris->num_vregs, iris->vregs);
130	if (ret) {
131		dev_err(&pdev->dev, "failed to get regulators\n");
132		return ret;
133	}
134
135	for (i = 0; i < iris->num_vregs; i++) {
136		if (data->vregs[i].max_voltage)
137			regulator_set_voltage(iris->vregs[i].consumer,
138					      data->vregs[i].min_voltage,
139					      data->vregs[i].max_voltage);
140
141		if (data->vregs[i].load_uA)
142			regulator_set_load(iris->vregs[i].consumer,
143					   data->vregs[i].load_uA);
144	}
145
146	qcom_wcnss_assign_iris(wcnss, iris, data->use_48mhz_xo);
147
148	return 0;
149}
150
151static int qcom_iris_remove(struct platform_device *pdev)
152{
153	struct qcom_wcnss *wcnss = dev_get_drvdata(pdev->dev.parent);
154
155	qcom_wcnss_assign_iris(wcnss, NULL, false);
156
157	return 0;
158}
159
160static const struct of_device_id iris_of_match[] = {
161	{ .compatible = "qcom,wcn3620", .data = &wcn3620_data },
162	{ .compatible = "qcom,wcn3660", .data = &wcn3660_data },
163	{ .compatible = "qcom,wcn3680", .data = &wcn3680_data },
164	{}
165};
166MODULE_DEVICE_TABLE(of, iris_of_match);
167
168struct platform_driver qcom_iris_driver = {
169	.probe = qcom_iris_probe,
170	.remove = qcom_iris_remove,
171	.driver = {
172		.name = "qcom-iris",
173		.of_match_table = iris_of_match,
174	},
175};