1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Copyright (c) 2014, The Linux Foundation. All rights reserved. |
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(map: rclk->regmap, reg: rclk->enable_reg, val: &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(map: rclk->regmap, reg: rclk->enable_reg, |
59 | mask: 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(map: rclk->regmap, reg: rclk->enable_reg, mask: 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 | * |
90 | * @dev: reference to the caller's device |
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 | */ |
97 | int devm_clk_register_regmap(struct device *dev, struct clk_regmap *rclk) |
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: dev->parent, NULL); |
103 | |
104 | return devm_clk_hw_register(dev, hw: &rclk->hw); |
105 | } |
106 | EXPORT_SYMBOL_GPL(devm_clk_register_regmap); |
107 | |