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 }; 177