diff options
Diffstat (limited to 'drivers/clk/qcom/clk-regmap.c')
-rw-r--r-- | drivers/clk/qcom/clk-regmap.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/drivers/clk/qcom/clk-regmap.c b/drivers/clk/qcom/clk-regmap.c new file mode 100644 index 000000000000..a58ba39a900c --- /dev/null +++ b/drivers/clk/qcom/clk-regmap.c | |||
@@ -0,0 +1,114 @@ | |||
1 | /* | ||
2 | * Copyright (c) 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/device.h> | ||
15 | #include <linux/clk-provider.h> | ||
16 | #include <linux/regmap.h> | ||
17 | #include <linux/export.h> | ||
18 | |||
19 | #include "clk-regmap.h" | ||
20 | |||
21 | /** | ||
22 | * clk_is_enabled_regmap - standard is_enabled() for regmap users | ||
23 | * | ||
24 | * @hw: clk to operate on | ||
25 | * | ||
26 | * Clocks that use regmap for their register I/O can set the | ||
27 | * enable_reg and enable_mask fields in their struct clk_regmap and then use | ||
28 | * this as their is_enabled operation, saving some code. | ||
29 | */ | ||
30 | int clk_is_enabled_regmap(struct clk_hw *hw) | ||
31 | { | ||
32 | struct clk_regmap *rclk = to_clk_regmap(hw); | ||
33 | unsigned int val; | ||
34 | int ret; | ||
35 | |||
36 | ret = regmap_read(rclk->regmap, rclk->enable_reg, &val); | ||
37 | if (ret != 0) | ||
38 | return ret; | ||
39 | |||
40 | if (rclk->enable_is_inverted) | ||
41 | return (val & rclk->enable_mask) == 0; | ||
42 | else | ||
43 | return (val & rclk->enable_mask) != 0; | ||
44 | } | ||
45 | EXPORT_SYMBOL_GPL(clk_is_enabled_regmap); | ||
46 | |||
47 | /** | ||
48 | * clk_enable_regmap - standard enable() for regmap users | ||
49 | * | ||
50 | * @hw: clk to operate on | ||
51 | * | ||
52 | * Clocks that use regmap for their register I/O can set the | ||
53 | * enable_reg and enable_mask fields in their struct clk_regmap and then use | ||
54 | * this as their enable() operation, saving some code. | ||
55 | */ | ||
56 | int clk_enable_regmap(struct clk_hw *hw) | ||
57 | { | ||
58 | struct clk_regmap *rclk = to_clk_regmap(hw); | ||
59 | unsigned int val; | ||
60 | |||
61 | if (rclk->enable_is_inverted) | ||
62 | val = 0; | ||
63 | else | ||
64 | val = rclk->enable_mask; | ||
65 | |||
66 | return regmap_update_bits(rclk->regmap, rclk->enable_reg, | ||
67 | rclk->enable_mask, val); | ||
68 | } | ||
69 | EXPORT_SYMBOL_GPL(clk_enable_regmap); | ||
70 | |||
71 | /** | ||
72 | * clk_disable_regmap - standard disable() for regmap users | ||
73 | * | ||
74 | * @hw: clk to operate on | ||
75 | * | ||
76 | * Clocks that use regmap for their register I/O can set the | ||
77 | * enable_reg and enable_mask fields in their struct clk_regmap and then use | ||
78 | * this as their disable() operation, saving some code. | ||
79 | */ | ||
80 | void clk_disable_regmap(struct clk_hw *hw) | ||
81 | { | ||
82 | struct clk_regmap *rclk = to_clk_regmap(hw); | ||
83 | unsigned int val; | ||
84 | |||
85 | if (rclk->enable_is_inverted) | ||
86 | val = rclk->enable_mask; | ||
87 | else | ||
88 | val = 0; | ||
89 | |||
90 | regmap_update_bits(rclk->regmap, rclk->enable_reg, rclk->enable_mask, | ||
91 | val); | ||
92 | } | ||
93 | EXPORT_SYMBOL_GPL(clk_disable_regmap); | ||
94 | |||
95 | /** | ||
96 | * devm_clk_register_regmap - register a clk_regmap clock | ||
97 | * | ||
98 | * @rclk: clk to operate on | ||
99 | * | ||
100 | * Clocks that use regmap for their register I/O should register their | ||
101 | * clk_regmap struct via this function so that the regmap is initialized | ||
102 | * and so that the clock is registered with the common clock framework. | ||
103 | */ | ||
104 | struct clk *devm_clk_register_regmap(struct device *dev, | ||
105 | struct clk_regmap *rclk) | ||
106 | { | ||
107 | if (dev && dev_get_regmap(dev, NULL)) | ||
108 | rclk->regmap = dev_get_regmap(dev, NULL); | ||
109 | else if (dev && dev->parent) | ||
110 | rclk->regmap = dev_get_regmap(dev->parent, NULL); | ||
111 | |||
112 | return devm_clk_register(dev, &rclk->hw); | ||
113 | } | ||
114 | EXPORT_SYMBOL_GPL(devm_clk_register_regmap); | ||