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 } 208