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 const struct of_device_id iris_of_match[] = { 97 { .compatible = "qcom,wcn3620", .data = &wcn3620_data }, 98 { .compatible = "qcom,wcn3660", .data = &wcn3660_data }, 99 { .compatible = "qcom,wcn3660b", .data = &wcn3680_data }, 100 { .compatible = "qcom,wcn3680", .data = &wcn3680_data }, 101 {} 102 }; 103 104 static void qcom_iris_release(struct device *dev) 105 { 106 struct qcom_iris *iris = container_of(dev, struct qcom_iris, dev); 107 108 of_node_put(iris->dev.of_node); 109 kfree(iris); 110 } 111 112 struct qcom_iris *qcom_iris_probe(struct device *parent, bool *use_48mhz_xo) 113 { 114 const struct of_device_id *match; 115 const struct iris_data *data; 116 struct device_node *of_node; 117 struct qcom_iris *iris; 118 int ret; 119 int i; 120 121 of_node = of_get_child_by_name(parent->of_node, "iris"); 122 if (!of_node) { 123 dev_err(parent, "No child node \"iris\" found\n"); 124 return ERR_PTR(-EINVAL); 125 } 126 127 iris = kzalloc(sizeof(*iris), GFP_KERNEL); 128 if (!iris) { 129 of_node_put(of_node); 130 return ERR_PTR(-ENOMEM); 131 } 132 133 device_initialize(&iris->dev); 134 iris->dev.parent = parent; 135 iris->dev.release = qcom_iris_release; 136 iris->dev.of_node = of_node; 137 138 dev_set_name(&iris->dev, "%s.iris", dev_name(parent)); 139 140 ret = device_add(&iris->dev); 141 if (ret) { 142 put_device(&iris->dev); 143 return ERR_PTR(ret); 144 } 145 146 match = of_match_device(iris_of_match, &iris->dev); 147 if (!match) { 148 dev_err(&iris->dev, "no matching compatible for iris\n"); 149 ret = -EINVAL; 150 goto err_device_del; 151 } 152 153 data = match->data; 154 155 iris->xo_clk = devm_clk_get(&iris->dev, "xo"); 156 if (IS_ERR(iris->xo_clk)) { 157 ret = PTR_ERR(iris->xo_clk); 158 if (ret != -EPROBE_DEFER) 159 dev_err(&iris->dev, "failed to acquire xo clk\n"); 160 goto err_device_del; 161 } 162 163 iris->num_vregs = data->num_vregs; 164 iris->vregs = devm_kcalloc(&iris->dev, 165 iris->num_vregs, 166 sizeof(struct regulator_bulk_data), 167 GFP_KERNEL); 168 if (!iris->vregs) { 169 ret = -ENOMEM; 170 goto err_device_del; 171 } 172 173 for (i = 0; i < iris->num_vregs; i++) 174 iris->vregs[i].supply = data->vregs[i].name; 175 176 ret = devm_regulator_bulk_get(&iris->dev, iris->num_vregs, iris->vregs); 177 if (ret) { 178 dev_err(&iris->dev, "failed to get regulators\n"); 179 goto err_device_del; 180 } 181 182 for (i = 0; i < iris->num_vregs; i++) { 183 if (data->vregs[i].max_voltage) 184 regulator_set_voltage(iris->vregs[i].consumer, 185 data->vregs[i].min_voltage, 186 data->vregs[i].max_voltage); 187 188 if (data->vregs[i].load_uA) 189 regulator_set_load(iris->vregs[i].consumer, 190 data->vregs[i].load_uA); 191 } 192 193 *use_48mhz_xo = data->use_48mhz_xo; 194 195 return iris; 196 197 err_device_del: 198 device_del(&iris->dev); 199 200 return ERR_PTR(ret); 201 } 202 203 void qcom_iris_remove(struct qcom_iris *iris) 204 { 205 device_del(&iris->dev); 206 } 207