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_device.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/regulator/consumer.h>
  16
  17 #include "qcom_wcnss.h"
  18
  19 struct 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
  28 struct iris_data {
  29         const struct wcnss_vreg_info *vregs;
  30         size_t num_vregs;
  31
  32         bool use_48mhz_xo;
  33 };
  34
  35 static 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
  46 static 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
  57 static 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
  68 int 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
  84 disable_regulators:
  85         regulator_bulk_disable(iris->num_vregs, iris->vregs);
  86
  87         return ret;
  88 }
  89
  90 void 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
  96 static 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
 151 static 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
 160 static 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,wcn3660b", .data = &wcn3680_data },
 164         { .compatible = "qcom,wcn3680", .data = &wcn3680_data },
 165         {}
 166 };
 167 MODULE_DEVICE_TABLE(of, iris_of_match);
 168
 169 struct platform_driver qcom_iris_driver = {
 170         .probe = qcom_iris_probe,
 171         .remove = qcom_iris_remove,
 172         .driver = {
 173                 .name = "qcom-iris",
 174                 .of_match_table = iris_of_match,
 175         },
 176 };