1 /* 2 * Qualcomm Wireless Connectivity Subsystem Iris driver 3 * 4 * Copyright (C) 2016 Linaro Ltd 5 * Copyright (C) 2014 Sony Mobile Communications AB 6 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * version 2 as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 */ 17 18 #include <linux/clk.h> 19 #include <linux/kernel.h> 20 #include <linux/module.h> 21 #include <linux/of_device.h> 22 #include <linux/platform_device.h> 23 #include <linux/regulator/consumer.h> 24 25 #include "qcom_wcnss.h" 26 27 struct qcom_iris { 28 struct device *dev; 29 30 struct clk *xo_clk; 31 32 struct regulator_bulk_data *vregs; 33 size_t num_vregs; 34 }; 35 36 struct iris_data { 37 const struct wcnss_vreg_info *vregs; 38 size_t num_vregs; 39 40 bool use_48mhz_xo; 41 }; 42 43 static const struct iris_data wcn3620_data = { 44 .vregs = (struct wcnss_vreg_info[]) { 45 { "vddxo", 1800000, 1800000, 10000 }, 46 { "vddrfa", 1300000, 1300000, 100000 }, 47 { "vddpa", 3300000, 3300000, 515000 }, 48 { "vdddig", 1800000, 1800000, 10000 }, 49 }, 50 .num_vregs = 4, 51 .use_48mhz_xo = false, 52 }; 53 54 static const struct iris_data wcn3660_data = { 55 .vregs = (struct wcnss_vreg_info[]) { 56 { "vddxo", 1800000, 1800000, 10000 }, 57 { "vddrfa", 1300000, 1300000, 100000 }, 58 { "vddpa", 2900000, 3000000, 515000 }, 59 { "vdddig", 1200000, 1225000, 10000 }, 60 }, 61 .num_vregs = 4, 62 .use_48mhz_xo = true, 63 }; 64 65 static const struct iris_data wcn3680_data = { 66 .vregs = (struct wcnss_vreg_info[]) { 67 { "vddxo", 1800000, 1800000, 10000 }, 68 { "vddrfa", 1300000, 1300000, 100000 }, 69 { "vddpa", 3300000, 3300000, 515000 }, 70 { "vdddig", 1800000, 1800000, 10000 }, 71 }, 72 .num_vregs = 4, 73 .use_48mhz_xo = true, 74 }; 75 76 int qcom_iris_enable(struct qcom_iris *iris) 77 { 78 int ret; 79 80 ret = regulator_bulk_enable(iris->num_vregs, iris->vregs); 81 if (ret) 82 return ret; 83 84 ret = clk_prepare_enable(iris->xo_clk); 85 if (ret) { 86 dev_err(iris->dev, "failed to enable xo clk\n"); 87 goto disable_regulators; 88 } 89 90 return 0; 91 92 disable_regulators: 93 regulator_bulk_disable(iris->num_vregs, iris->vregs); 94 95 return ret; 96 } 97 EXPORT_SYMBOL_GPL(qcom_iris_enable); 98 99 void qcom_iris_disable(struct qcom_iris *iris) 100 { 101 clk_disable_unprepare(iris->xo_clk); 102 regulator_bulk_disable(iris->num_vregs, iris->vregs); 103 } 104 EXPORT_SYMBOL_GPL(qcom_iris_disable); 105 106 static int qcom_iris_probe(struct platform_device *pdev) 107 { 108 const struct iris_data *data; 109 struct qcom_wcnss *wcnss; 110 struct qcom_iris *iris; 111 int ret; 112 int i; 113 114 iris = devm_kzalloc(&pdev->dev, sizeof(struct qcom_iris), GFP_KERNEL); 115 if (!iris) 116 return -ENOMEM; 117 118 data = of_device_get_match_data(&pdev->dev); 119 wcnss = dev_get_drvdata(pdev->dev.parent); 120 121 iris->xo_clk = devm_clk_get(&pdev->dev, "xo"); 122 if (IS_ERR(iris->xo_clk)) { 123 if (PTR_ERR(iris->xo_clk) != -EPROBE_DEFER) 124 dev_err(&pdev->dev, "failed to acquire xo clk\n"); 125 return PTR_ERR(iris->xo_clk); 126 } 127 128 iris->num_vregs = data->num_vregs; 129 iris->vregs = devm_kcalloc(&pdev->dev, 130 iris->num_vregs, 131 sizeof(struct regulator_bulk_data), 132 GFP_KERNEL); 133 if (!iris->vregs) 134 return -ENOMEM; 135 136 for (i = 0; i < iris->num_vregs; i++) 137 iris->vregs[i].supply = data->vregs[i].name; 138 139 ret = devm_regulator_bulk_get(&pdev->dev, iris->num_vregs, iris->vregs); 140 if (ret) { 141 dev_err(&pdev->dev, "failed to get regulators\n"); 142 return ret; 143 } 144 145 for (i = 0; i < iris->num_vregs; i++) { 146 if (data->vregs[i].max_voltage) 147 regulator_set_voltage(iris->vregs[i].consumer, 148 data->vregs[i].min_voltage, 149 data->vregs[i].max_voltage); 150 151 if (data->vregs[i].load_uA) 152 regulator_set_load(iris->vregs[i].consumer, 153 data->vregs[i].load_uA); 154 } 155 156 qcom_wcnss_assign_iris(wcnss, iris, data->use_48mhz_xo); 157 158 return 0; 159 } 160 161 static int qcom_iris_remove(struct platform_device *pdev) 162 { 163 struct qcom_wcnss *wcnss = dev_get_drvdata(pdev->dev.parent); 164 165 qcom_wcnss_assign_iris(wcnss, NULL, false); 166 167 return 0; 168 } 169 170 static const struct of_device_id iris_of_match[] = { 171 { .compatible = "qcom,wcn3620", .data = &wcn3620_data }, 172 { .compatible = "qcom,wcn3660", .data = &wcn3660_data }, 173 { .compatible = "qcom,wcn3680", .data = &wcn3680_data }, 174 {} 175 }; 176 177 static struct platform_driver wcnss_driver = { 178 .probe = qcom_iris_probe, 179 .remove = qcom_iris_remove, 180 .driver = { 181 .name = "qcom-iris", 182 .of_match_table = iris_of_match, 183 }, 184 }; 185 186 module_platform_driver(wcnss_driver); 187 MODULE_DESCRIPTION("Qualcomm Wireless Subsystem Iris driver"); 188 MODULE_LICENSE("GPL v2"); 189