Bjorn Andersson | aed361a | 2016-08-12 18:18:59 -0700 | [diff] [blame] | 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"); |