drivers/remoteproc/qcom_wcnss_iris.c

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