2 * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
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.
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.
14 #include <linux/export.h>
15 #include <linux/module.h>
16 #include <linux/regmap.h>
17 #include <linux/platform_device.h>
18 #include <linux/clk-provider.h>
19 #include <linux/reset-controller.h>
23 #include "clk-regmap.h"
28 struct qcom_reset_controller reset;
29 struct clk_onecell_data data;
34 struct freq_tbl *qcom_find_freq(const struct freq_tbl *f, unsigned long rate)
46 /* Default to our fastest rate */
49 EXPORT_SYMBOL_GPL(qcom_find_freq);
51 int qcom_find_src_index(struct clk_hw *hw, const struct parent_map *map, u8 src)
53 int i, num_parents = clk_hw_get_num_parents(hw);
55 for (i = 0; i < num_parents; i++)
56 if (src == map[i].src)
61 EXPORT_SYMBOL_GPL(qcom_find_src_index);
64 qcom_cc_map(struct platform_device *pdev, const struct qcom_cc_desc *desc)
68 struct device *dev = &pdev->dev;
70 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
71 base = devm_ioremap_resource(dev, res);
73 return ERR_CAST(base);
75 return devm_regmap_init_mmio(dev, base, desc->config);
77 EXPORT_SYMBOL_GPL(qcom_cc_map);
79 static void qcom_cc_del_clk_provider(void *data)
81 of_clk_del_provider(data);
84 static void qcom_cc_reset_unregister(void *data)
86 reset_controller_unregister(data);
89 static void qcom_cc_gdsc_unregister(void *data)
91 gdsc_unregister(data);
94 int qcom_cc_really_probe(struct platform_device *pdev,
95 const struct qcom_cc_desc *desc, struct regmap *regmap)
98 struct device *dev = &pdev->dev;
100 struct clk_onecell_data *data;
102 struct qcom_reset_controller *reset;
104 size_t num_clks = desc->num_clks;
105 struct clk_regmap **rclks = desc->clks;
107 cc = devm_kzalloc(dev, sizeof(*cc) + sizeof(*clks) * num_clks,
115 data->clk_num = num_clks;
117 for (i = 0; i < num_clks; i++) {
119 clks[i] = ERR_PTR(-ENOENT);
122 clk = devm_clk_register_regmap(dev, rclks[i]);
128 ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, data);
132 devm_add_action(dev, qcom_cc_del_clk_provider, pdev->dev.of_node);
135 reset->rcdev.of_node = dev->of_node;
136 reset->rcdev.ops = &qcom_reset_ops;
137 reset->rcdev.owner = dev->driver->owner;
138 reset->rcdev.nr_resets = desc->num_resets;
139 reset->regmap = regmap;
140 reset->reset_map = desc->resets;
142 ret = reset_controller_register(&reset->rcdev);
146 devm_add_action(dev, qcom_cc_reset_unregister, &reset->rcdev);
148 if (desc->gdscs && desc->num_gdscs) {
149 ret = gdsc_register(dev, desc->gdscs, desc->num_gdscs,
150 &reset->rcdev, regmap);
155 devm_add_action(dev, qcom_cc_gdsc_unregister, dev);
160 EXPORT_SYMBOL_GPL(qcom_cc_really_probe);
162 int qcom_cc_probe(struct platform_device *pdev, const struct qcom_cc_desc *desc)
164 struct regmap *regmap;
166 regmap = qcom_cc_map(pdev, desc);
168 return PTR_ERR(regmap);
170 return qcom_cc_really_probe(pdev, desc, regmap);
172 EXPORT_SYMBOL_GPL(qcom_cc_probe);
174 MODULE_LICENSE("GPL v2");