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f9419783 | 1 | // SPDX-License-Identifier: GPL-2.0 |
085d7a45 SB |
2 | /* |
3 | * Copyright (c) 2014, The Linux Foundation. All rights reserved. | |
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4 | */ |
5 | ||
6 | #include <linux/device.h> | |
7 | #include <linux/clk-provider.h> | |
8 | #include <linux/regmap.h> | |
9 | #include <linux/export.h> | |
10 | ||
11 | #include "clk-regmap.h" | |
12 | ||
13 | /** | |
14 | * clk_is_enabled_regmap - standard is_enabled() for regmap users | |
15 | * | |
16 | * @hw: clk to operate on | |
17 | * | |
18 | * Clocks that use regmap for their register I/O can set the | |
19 | * enable_reg and enable_mask fields in their struct clk_regmap and then use | |
20 | * this as their is_enabled operation, saving some code. | |
21 | */ | |
22 | int clk_is_enabled_regmap(struct clk_hw *hw) | |
23 | { | |
24 | struct clk_regmap *rclk = to_clk_regmap(hw); | |
25 | unsigned int val; | |
26 | int ret; | |
27 | ||
28 | ret = regmap_read(rclk->regmap, rclk->enable_reg, &val); | |
29 | if (ret != 0) | |
30 | return ret; | |
31 | ||
32 | if (rclk->enable_is_inverted) | |
33 | return (val & rclk->enable_mask) == 0; | |
34 | else | |
35 | return (val & rclk->enable_mask) != 0; | |
36 | } | |
37 | EXPORT_SYMBOL_GPL(clk_is_enabled_regmap); | |
38 | ||
39 | /** | |
40 | * clk_enable_regmap - standard enable() for regmap users | |
41 | * | |
42 | * @hw: clk to operate on | |
43 | * | |
44 | * Clocks that use regmap for their register I/O can set the | |
45 | * enable_reg and enable_mask fields in their struct clk_regmap and then use | |
46 | * this as their enable() operation, saving some code. | |
47 | */ | |
48 | int clk_enable_regmap(struct clk_hw *hw) | |
49 | { | |
50 | struct clk_regmap *rclk = to_clk_regmap(hw); | |
51 | unsigned int val; | |
52 | ||
53 | if (rclk->enable_is_inverted) | |
54 | val = 0; | |
55 | else | |
56 | val = rclk->enable_mask; | |
57 | ||
58 | return regmap_update_bits(rclk->regmap, rclk->enable_reg, | |
59 | rclk->enable_mask, val); | |
60 | } | |
61 | EXPORT_SYMBOL_GPL(clk_enable_regmap); | |
62 | ||
63 | /** | |
64 | * clk_disable_regmap - standard disable() for regmap users | |
65 | * | |
66 | * @hw: clk to operate on | |
67 | * | |
68 | * Clocks that use regmap for their register I/O can set the | |
69 | * enable_reg and enable_mask fields in their struct clk_regmap and then use | |
70 | * this as their disable() operation, saving some code. | |
71 | */ | |
72 | void clk_disable_regmap(struct clk_hw *hw) | |
73 | { | |
74 | struct clk_regmap *rclk = to_clk_regmap(hw); | |
75 | unsigned int val; | |
76 | ||
77 | if (rclk->enable_is_inverted) | |
78 | val = rclk->enable_mask; | |
79 | else | |
80 | val = 0; | |
81 | ||
82 | regmap_update_bits(rclk->regmap, rclk->enable_reg, rclk->enable_mask, | |
83 | val); | |
84 | } | |
85 | EXPORT_SYMBOL_GPL(clk_disable_regmap); | |
86 | ||
87 | /** | |
88 | * devm_clk_register_regmap - register a clk_regmap clock | |
89 | * | |
4414c16e | 90 | * @dev: reference to the caller's device |
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91 | * @rclk: clk to operate on |
92 | * | |
93 | * Clocks that use regmap for their register I/O should register their | |
94 | * clk_regmap struct via this function so that the regmap is initialized | |
95 | * and so that the clock is registered with the common clock framework. | |
96 | */ | |
120c1552 | 97 | int devm_clk_register_regmap(struct device *dev, struct clk_regmap *rclk) |
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98 | { |
99 | if (dev && dev_get_regmap(dev, NULL)) | |
100 | rclk->regmap = dev_get_regmap(dev, NULL); | |
101 | else if (dev && dev->parent) | |
102 | rclk->regmap = dev_get_regmap(dev->parent, NULL); | |
103 | ||
120c1552 | 104 | return devm_clk_hw_register(dev, &rclk->hw); |
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105 | } |
106 | EXPORT_SYMBOL_GPL(devm_clk_register_regmap); |