| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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(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 | * |
| 90 | * @rclk: clk to operate on |
| 91 | * |
| 92 | * Clocks that use regmap for their register I/O should register their |
| 93 | * clk_regmap struct via this function so that the regmap is initialized |
| 94 | * and so that the clock is registered with the common clock framework. |
| 95 | */ |
| 96 | int devm_clk_register_regmap(struct device *dev, struct clk_regmap *rclk) |
| 97 | { |
| 98 | if (dev && dev_get_regmap(dev, NULL)) |
| 99 | rclk->regmap = dev_get_regmap(dev, NULL); |
| 100 | else if (dev && dev->parent) |
| 101 | rclk->regmap = dev_get_regmap(dev->parent, NULL); |
| 102 | |
| 103 | return devm_clk_hw_register(dev, &rclk->hw); |
| 104 | } |
| 105 | EXPORT_SYMBOL_GPL(devm_clk_register_regmap); |