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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Clkout driver for Rockchip RK808
4 *
5 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
6 *
7 * Author:Chris Zhong <zyw@rock-chips.com>
8 */
9
10#include <linux/clk-provider.h>
11#include <linux/module.h>
12#include <linux/slab.h>
13#include <linux/platform_device.h>
14#include <linux/mfd/rk808.h>
15
16struct rk808_clkout {
17 struct regmap *regmap;
18 struct clk_hw clkout1_hw;
19 struct clk_hw clkout2_hw;
20};
21
22static unsigned long rk808_clkout_recalc_rate(struct clk_hw *hw,
23 unsigned long parent_rate)
24{
25 return 32768;
26}
27
28static int rk808_clkout2_enable(struct clk_hw *hw, bool enable)
29{
30 struct rk808_clkout *rk808_clkout = container_of(hw,
31 struct rk808_clkout,
32 clkout2_hw);
33
34 return regmap_update_bits(rk808_clkout->regmap, RK808_CLK32OUT_REG,
35 CLK32KOUT2_EN, enable ? CLK32KOUT2_EN : 0);
36}
37
38static int rk808_clkout2_prepare(struct clk_hw *hw)
39{
40 return rk808_clkout2_enable(hw, true);
41}
42
43static void rk808_clkout2_unprepare(struct clk_hw *hw)
44{
45 rk808_clkout2_enable(hw, false);
46}
47
48static int rk808_clkout2_is_prepared(struct clk_hw *hw)
49{
50 struct rk808_clkout *rk808_clkout = container_of(hw,
51 struct rk808_clkout,
52 clkout2_hw);
53 uint32_t val;
54
55 int ret = regmap_read(rk808_clkout->regmap, RK808_CLK32OUT_REG, &val);
56
57 if (ret < 0)
58 return ret;
59
60 return (val & CLK32KOUT2_EN) ? 1 : 0;
61}
62
63static const struct clk_ops rk808_clkout1_ops = {
64 .recalc_rate = rk808_clkout_recalc_rate,
65};
66
67static const struct clk_ops rk808_clkout2_ops = {
68 .prepare = rk808_clkout2_prepare,
69 .unprepare = rk808_clkout2_unprepare,
70 .is_prepared = rk808_clkout2_is_prepared,
71 .recalc_rate = rk808_clkout_recalc_rate,
72};
73
74static struct clk_hw *
75of_clk_rk808_get(struct of_phandle_args *clkspec, void *data)
76{
77 struct rk808_clkout *rk808_clkout = data;
78 unsigned int idx = clkspec->args[0];
79
80 if (idx >= 2) {
81 pr_err("%s: invalid index %u\n", __func__, idx);
82 return ERR_PTR(-EINVAL);
83 }
84
85 return idx ? &rk808_clkout->clkout2_hw : &rk808_clkout->clkout1_hw;
86}
87
88static int rk817_clkout2_enable(struct clk_hw *hw, bool enable)
89{
90 struct rk808_clkout *rk808_clkout = container_of(hw,
91 struct rk808_clkout,
92 clkout2_hw);
93
94 return regmap_update_bits(rk808_clkout->regmap, RK817_SYS_CFG(1),
95 RK817_CLK32KOUT2_EN,
96 enable ? RK817_CLK32KOUT2_EN : 0);
97}
98
99static int rk817_clkout2_prepare(struct clk_hw *hw)
100{
101 return rk817_clkout2_enable(hw, true);
102}
103
104static void rk817_clkout2_unprepare(struct clk_hw *hw)
105{
106 rk817_clkout2_enable(hw, false);
107}
108
109static int rk817_clkout2_is_prepared(struct clk_hw *hw)
110{
111 struct rk808_clkout *rk808_clkout = container_of(hw,
112 struct rk808_clkout,
113 clkout2_hw);
114 unsigned int val;
115
116 int ret = regmap_read(rk808_clkout->regmap, RK817_SYS_CFG(1), &val);
117
118 if (ret < 0)
119 return 0;
120
121 return (val & RK817_CLK32KOUT2_EN) ? 1 : 0;
122}
123
124static const struct clk_ops rk817_clkout2_ops = {
125 .prepare = rk817_clkout2_prepare,
126 .unprepare = rk817_clkout2_unprepare,
127 .is_prepared = rk817_clkout2_is_prepared,
128 .recalc_rate = rk808_clkout_recalc_rate,
129};
130
131static const struct clk_ops *rkpmic_get_ops(long variant)
132{
133 switch (variant) {
134 case RK809_ID:
135 case RK817_ID:
136 return &rk817_clkout2_ops;
137 /*
138 * For the default case, it match the following PMIC type.
139 * RK805_ID
140 * RK808_ID
141 * RK818_ID
142 */
143 default:
144 return &rk808_clkout2_ops;
145 }
146}
147
148static int rk808_clkout_probe(struct platform_device *pdev)
149{
150 struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
151 struct device *dev = &pdev->dev;
152 struct clk_init_data init = {};
153 struct rk808_clkout *rk808_clkout;
154 int ret;
155
156 dev->of_node = pdev->dev.parent->of_node;
157
158 rk808_clkout = devm_kzalloc(dev,
159 sizeof(*rk808_clkout), GFP_KERNEL);
160 if (!rk808_clkout)
161 return -ENOMEM;
162
163 rk808_clkout->regmap = dev_get_regmap(pdev->dev.parent, NULL);
164 if (!rk808_clkout->regmap)
165 return -ENODEV;
166
167 init.parent_names = NULL;
168 init.num_parents = 0;
169 init.name = "rk808-clkout1";
170 init.ops = &rk808_clkout1_ops;
171 rk808_clkout->clkout1_hw.init = &init;
172
173 /* optional override of the clockname */
174 of_property_read_string_index(dev->of_node, "clock-output-names",
175 0, &init.name);
176
177 ret = devm_clk_hw_register(dev, &rk808_clkout->clkout1_hw);
178 if (ret)
179 return ret;
180
181 init.name = "rk808-clkout2";
182 init.ops = rkpmic_get_ops(rk808->variant);
183 rk808_clkout->clkout2_hw.init = &init;
184
185 /* optional override of the clockname */
186 of_property_read_string_index(dev->of_node, "clock-output-names",
187 1, &init.name);
188
189 ret = devm_clk_hw_register(dev, &rk808_clkout->clkout2_hw);
190 if (ret)
191 return ret;
192
193 return devm_of_clk_add_hw_provider(&pdev->dev, of_clk_rk808_get,
194 rk808_clkout);
195}
196
197static struct platform_driver rk808_clkout_driver = {
198 .probe = rk808_clkout_probe,
199 .driver = {
200 .name = "rk808-clkout",
201 },
202};
203
204module_platform_driver(rk808_clkout_driver);
205
206MODULE_DESCRIPTION("Clkout driver for the rk808 series PMICs");
207MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
208MODULE_LICENSE("GPL");
209MODULE_ALIAS("platform:rk808-clkout");
1/*
2 * Clkout driver for Rockchip RK808
3 *
4 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
5 *
6 * Author:Chris Zhong <zyw@rock-chips.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms and conditions 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 it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 */
17
18#include <linux/clk-provider.h>
19#include <linux/module.h>
20#include <linux/slab.h>
21#include <linux/platform_device.h>
22#include <linux/mfd/rk808.h>
23#include <linux/i2c.h>
24
25struct rk808_clkout {
26 struct rk808 *rk808;
27 struct clk_hw clkout1_hw;
28 struct clk_hw clkout2_hw;
29};
30
31static unsigned long rk808_clkout_recalc_rate(struct clk_hw *hw,
32 unsigned long parent_rate)
33{
34 return 32768;
35}
36
37static int rk808_clkout2_enable(struct clk_hw *hw, bool enable)
38{
39 struct rk808_clkout *rk808_clkout = container_of(hw,
40 struct rk808_clkout,
41 clkout2_hw);
42 struct rk808 *rk808 = rk808_clkout->rk808;
43
44 return regmap_update_bits(rk808->regmap, RK808_CLK32OUT_REG,
45 CLK32KOUT2_EN, enable ? CLK32KOUT2_EN : 0);
46}
47
48static int rk808_clkout2_prepare(struct clk_hw *hw)
49{
50 return rk808_clkout2_enable(hw, true);
51}
52
53static void rk808_clkout2_unprepare(struct clk_hw *hw)
54{
55 rk808_clkout2_enable(hw, false);
56}
57
58static int rk808_clkout2_is_prepared(struct clk_hw *hw)
59{
60 struct rk808_clkout *rk808_clkout = container_of(hw,
61 struct rk808_clkout,
62 clkout2_hw);
63 struct rk808 *rk808 = rk808_clkout->rk808;
64 uint32_t val;
65
66 int ret = regmap_read(rk808->regmap, RK808_CLK32OUT_REG, &val);
67
68 if (ret < 0)
69 return ret;
70
71 return (val & CLK32KOUT2_EN) ? 1 : 0;
72}
73
74static const struct clk_ops rk808_clkout1_ops = {
75 .recalc_rate = rk808_clkout_recalc_rate,
76};
77
78static const struct clk_ops rk808_clkout2_ops = {
79 .prepare = rk808_clkout2_prepare,
80 .unprepare = rk808_clkout2_unprepare,
81 .is_prepared = rk808_clkout2_is_prepared,
82 .recalc_rate = rk808_clkout_recalc_rate,
83};
84
85static struct clk_hw *
86of_clk_rk808_get(struct of_phandle_args *clkspec, void *data)
87{
88 struct rk808_clkout *rk808_clkout = data;
89 unsigned int idx = clkspec->args[0];
90
91 if (idx >= 2) {
92 pr_err("%s: invalid index %u\n", __func__, idx);
93 return ERR_PTR(-EINVAL);
94 }
95
96 return idx ? &rk808_clkout->clkout2_hw : &rk808_clkout->clkout1_hw;
97}
98
99static int rk808_clkout_probe(struct platform_device *pdev)
100{
101 struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
102 struct i2c_client *client = rk808->i2c;
103 struct device_node *node = client->dev.of_node;
104 struct clk_init_data init = {};
105 struct rk808_clkout *rk808_clkout;
106 int ret;
107
108 rk808_clkout = devm_kzalloc(&client->dev,
109 sizeof(*rk808_clkout), GFP_KERNEL);
110 if (!rk808_clkout)
111 return -ENOMEM;
112
113 rk808_clkout->rk808 = rk808;
114
115 init.parent_names = NULL;
116 init.num_parents = 0;
117 init.name = "rk808-clkout1";
118 init.ops = &rk808_clkout1_ops;
119 rk808_clkout->clkout1_hw.init = &init;
120
121 /* optional override of the clockname */
122 of_property_read_string_index(node, "clock-output-names",
123 0, &init.name);
124
125 ret = devm_clk_hw_register(&client->dev, &rk808_clkout->clkout1_hw);
126 if (ret)
127 return ret;
128
129 init.name = "rk808-clkout2";
130 init.ops = &rk808_clkout2_ops;
131 rk808_clkout->clkout2_hw.init = &init;
132
133 /* optional override of the clockname */
134 of_property_read_string_index(node, "clock-output-names",
135 1, &init.name);
136
137 ret = devm_clk_hw_register(&client->dev, &rk808_clkout->clkout2_hw);
138 if (ret)
139 return ret;
140
141 return of_clk_add_hw_provider(node, of_clk_rk808_get, rk808_clkout);
142}
143
144static int rk808_clkout_remove(struct platform_device *pdev)
145{
146 struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
147 struct i2c_client *client = rk808->i2c;
148 struct device_node *node = client->dev.of_node;
149
150 of_clk_del_provider(node);
151
152 return 0;
153}
154
155static struct platform_driver rk808_clkout_driver = {
156 .probe = rk808_clkout_probe,
157 .remove = rk808_clkout_remove,
158 .driver = {
159 .name = "rk808-clkout",
160 },
161};
162
163module_platform_driver(rk808_clkout_driver);
164
165MODULE_DESCRIPTION("Clkout driver for the rk808 series PMICs");
166MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
167MODULE_LICENSE("GPL");
168MODULE_ALIAS("platform:rk808-clkout");