linux/drivers/remoteproc/qcom_wcnss_iris.c
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   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,wcn3660b", .data = &wcn3680_data },
 164        { .compatible = "qcom,wcn3680", .data = &wcn3680_data },
 165        {}
 166};
 167MODULE_DEVICE_TABLE(of, iris_of_match);
 168
 169struct 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};
 177