Stephen Boyd | 49fc825 | 2014-03-21 17:59:37 -0700 | [diff] [blame] | 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++) { |
Stephen Boyd | 9ec2749 | 2014-05-16 16:07:14 -0700 | [diff] [blame^] | 65 | if (!rclks[i]) { |
| 66 | clks[i] = ERR_PTR(-ENOENT); |
Stephen Boyd | 49fc825 | 2014-03-21 17:59:37 -0700 | [diff] [blame] | 67 | continue; |
Stephen Boyd | 9ec2749 | 2014-05-16 16:07:14 -0700 | [diff] [blame^] | 68 | } |
Stephen Boyd | 49fc825 | 2014-03-21 17:59:37 -0700 | [diff] [blame] | 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); |