1 /* 2 * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved. 3 * 4 * This software is licensed under the terms of the GNU General Public 5 * License version 2, as published by the Free Software Foundation, and 6 * may be copied, distributed, and modified under those terms. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14 #include <linux/export.h> 15 #include <linux/regmap.h> 16 #include <linux/platform_device.h> 17 #include <linux/clk-provider.h> 18 #include <linux/reset-controller.h> 19 20 #include "common.h" 21 #include "clk-regmap.h" 22 #include "reset.h" 23 24 struct qcom_cc { 25 struct qcom_reset_controller reset; 26 struct clk_onecell_data data; 27 struct clk *clks[]; 28 }; 29 30 int qcom_cc_probe(struct platform_device *pdev, const struct qcom_cc_desc *desc) 31 { 32 void __iomem *base; 33 struct resource *res; 34 int i, ret; 35 struct device *dev = &pdev->dev; 36 struct clk *clk; 37 struct clk_onecell_data *data; 38 struct clk **clks; 39 struct regmap *regmap; 40 struct qcom_reset_controller *reset; 41 struct qcom_cc *cc; 42 size_t num_clks = desc->num_clks; 43 struct clk_regmap **rclks = desc->clks; 44 45 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 46 base = devm_ioremap_resource(dev, res); 47 if (IS_ERR(base)) 48 return PTR_ERR(base); 49 50 regmap = devm_regmap_init_mmio(dev, base, desc->config); 51 if (IS_ERR(regmap)) 52 return PTR_ERR(regmap); 53 54 cc = devm_kzalloc(dev, sizeof(*cc) + sizeof(*clks) * num_clks, 55 GFP_KERNEL); 56 if (!cc) 57 return -ENOMEM; 58 59 clks = cc->clks; 60 data = &cc->data; 61 data->clks = clks; 62 data->clk_num = num_clks; 63 64 for (i = 0; i < num_clks; i++) { 65 if (!rclks[i]) { 66 clks[i] = ERR_PTR(-ENOENT); 67 continue; 68 } 69 clk = devm_clk_register_regmap(dev, rclks[i]); 70 if (IS_ERR(clk)) 71 return PTR_ERR(clk); 72 clks[i] = clk; 73 } 74 75 ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, data); 76 if (ret) 77 return ret; 78 79 reset = &cc->reset; 80 reset->rcdev.of_node = dev->of_node; 81 reset->rcdev.ops = &qcom_reset_ops; 82 reset->rcdev.owner = dev->driver->owner; 83 reset->rcdev.nr_resets = desc->num_resets; 84 reset->regmap = regmap; 85 reset->reset_map = desc->resets; 86 platform_set_drvdata(pdev, &reset->rcdev); 87 88 ret = reset_controller_register(&reset->rcdev); 89 if (ret) 90 of_clk_del_provider(dev->of_node); 91 92 return ret; 93 } 94 EXPORT_SYMBOL_GPL(qcom_cc_probe); 95 96 void qcom_cc_remove(struct platform_device *pdev) 97 { 98 of_clk_del_provider(pdev->dev.of_node); 99 reset_controller_unregister(platform_get_drvdata(pdev)); 100 } 101 EXPORT_SYMBOL_GPL(qcom_cc_remove); 102