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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Qualcomm Wireless Connectivity Subsystem Iris driver4 *5 * Copyright (C) 2016 Linaro Ltd6 * Copyright (C) 2014 Sony Mobile Communications AB7 * 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