1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (c) 2014, The Linux Foundation. All rights reserved.
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <linux/device.h>
7*4882a593Smuzhiyun #include <linux/clk-provider.h>
8*4882a593Smuzhiyun #include <linux/regmap.h>
9*4882a593Smuzhiyun #include <linux/export.h>
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include "clk-regmap.h"
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun /**
14*4882a593Smuzhiyun * clk_is_enabled_regmap - standard is_enabled() for regmap users
15*4882a593Smuzhiyun *
16*4882a593Smuzhiyun * @hw: clk to operate on
17*4882a593Smuzhiyun *
18*4882a593Smuzhiyun * Clocks that use regmap for their register I/O can set the
19*4882a593Smuzhiyun * enable_reg and enable_mask fields in their struct clk_regmap and then use
20*4882a593Smuzhiyun * this as their is_enabled operation, saving some code.
21*4882a593Smuzhiyun */
clk_is_enabled_regmap(struct clk_hw * hw)22*4882a593Smuzhiyun int clk_is_enabled_regmap(struct clk_hw *hw)
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun struct clk_regmap *rclk = to_clk_regmap(hw);
25*4882a593Smuzhiyun unsigned int val;
26*4882a593Smuzhiyun int ret;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun ret = regmap_read(rclk->regmap, rclk->enable_reg, &val);
29*4882a593Smuzhiyun if (ret != 0)
30*4882a593Smuzhiyun return ret;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun if (rclk->enable_is_inverted)
33*4882a593Smuzhiyun return (val & rclk->enable_mask) == 0;
34*4882a593Smuzhiyun else
35*4882a593Smuzhiyun return (val & rclk->enable_mask) != 0;
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(clk_is_enabled_regmap);
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun /**
40*4882a593Smuzhiyun * clk_enable_regmap - standard enable() for regmap users
41*4882a593Smuzhiyun *
42*4882a593Smuzhiyun * @hw: clk to operate on
43*4882a593Smuzhiyun *
44*4882a593Smuzhiyun * Clocks that use regmap for their register I/O can set the
45*4882a593Smuzhiyun * enable_reg and enable_mask fields in their struct clk_regmap and then use
46*4882a593Smuzhiyun * this as their enable() operation, saving some code.
47*4882a593Smuzhiyun */
clk_enable_regmap(struct clk_hw * hw)48*4882a593Smuzhiyun int clk_enable_regmap(struct clk_hw *hw)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun struct clk_regmap *rclk = to_clk_regmap(hw);
51*4882a593Smuzhiyun unsigned int val;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun if (rclk->enable_is_inverted)
54*4882a593Smuzhiyun val = 0;
55*4882a593Smuzhiyun else
56*4882a593Smuzhiyun val = rclk->enable_mask;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun return regmap_update_bits(rclk->regmap, rclk->enable_reg,
59*4882a593Smuzhiyun rclk->enable_mask, val);
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(clk_enable_regmap);
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun /**
64*4882a593Smuzhiyun * clk_disable_regmap - standard disable() for regmap users
65*4882a593Smuzhiyun *
66*4882a593Smuzhiyun * @hw: clk to operate on
67*4882a593Smuzhiyun *
68*4882a593Smuzhiyun * Clocks that use regmap for their register I/O can set the
69*4882a593Smuzhiyun * enable_reg and enable_mask fields in their struct clk_regmap and then use
70*4882a593Smuzhiyun * this as their disable() operation, saving some code.
71*4882a593Smuzhiyun */
clk_disable_regmap(struct clk_hw * hw)72*4882a593Smuzhiyun void clk_disable_regmap(struct clk_hw *hw)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun struct clk_regmap *rclk = to_clk_regmap(hw);
75*4882a593Smuzhiyun unsigned int val;
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun if (rclk->enable_is_inverted)
78*4882a593Smuzhiyun val = rclk->enable_mask;
79*4882a593Smuzhiyun else
80*4882a593Smuzhiyun val = 0;
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun regmap_update_bits(rclk->regmap, rclk->enable_reg, rclk->enable_mask,
83*4882a593Smuzhiyun val);
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(clk_disable_regmap);
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun /**
88*4882a593Smuzhiyun * devm_clk_register_regmap - register a clk_regmap clock
89*4882a593Smuzhiyun *
90*4882a593Smuzhiyun * @rclk: clk to operate on
91*4882a593Smuzhiyun *
92*4882a593Smuzhiyun * Clocks that use regmap for their register I/O should register their
93*4882a593Smuzhiyun * clk_regmap struct via this function so that the regmap is initialized
94*4882a593Smuzhiyun * and so that the clock is registered with the common clock framework.
95*4882a593Smuzhiyun */
devm_clk_register_regmap(struct device * dev,struct clk_regmap * rclk)96*4882a593Smuzhiyun int devm_clk_register_regmap(struct device *dev, struct clk_regmap *rclk)
97*4882a593Smuzhiyun {
98*4882a593Smuzhiyun if (dev && dev_get_regmap(dev, NULL))
99*4882a593Smuzhiyun rclk->regmap = dev_get_regmap(dev, NULL);
100*4882a593Smuzhiyun else if (dev && dev->parent)
101*4882a593Smuzhiyun rclk->regmap = dev_get_regmap(dev->parent, NULL);
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun return devm_clk_hw_register(dev, &rclk->hw);
104*4882a593Smuzhiyun }
105*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(devm_clk_register_regmap);
106