cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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clk-regmap.c (2828B)

      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 */
     22int 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}
     37EXPORT_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 */
     48int 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}
     61EXPORT_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 */
     72void 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}
     85EXPORT_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 */
     97int 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->parent, NULL);
    103
    104	return devm_clk_hw_register(dev, &rclk->hw);
    105}
    106EXPORT_SYMBOL_GPL(devm_clk_register_regmap);