115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2014, The Linux Foundation. All rights reserved.
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/export.h>
|
|
|
|
#include "clk-regmap.h"
|
|
|
|
/**
|
|
* clk_is_enabled_regmap - standard is_enabled() for regmap users
|
|
*
|
|
* @hw: clk to operate on
|
|
*
|
|
* Clocks that use regmap for their register I/O can set the
|
|
* enable_reg and enable_mask fields in their struct clk_regmap and then use
|
|
* this as their is_enabled operation, saving some code.
|
|
*/
|
|
int clk_is_enabled_regmap(struct clk_hw *hw)
|
|
{
|
|
struct clk_regmap *rclk = to_clk_regmap(hw);
|
|
unsigned int val;
|
|
int ret;
|
|
|
|
ret = regmap_read(rclk->regmap, rclk->enable_reg, &val);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
if (rclk->enable_is_inverted)
|
|
return (val & rclk->enable_mask) == 0;
|
|
else
|
|
return (val & rclk->enable_mask) != 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(clk_is_enabled_regmap);
|
|
|
|
/**
|
|
* clk_enable_regmap - standard enable() for regmap users
|
|
*
|
|
* @hw: clk to operate on
|
|
*
|
|
* Clocks that use regmap for their register I/O can set the
|
|
* enable_reg and enable_mask fields in their struct clk_regmap and then use
|
|
* this as their enable() operation, saving some code.
|
|
*/
|
|
int clk_enable_regmap(struct clk_hw *hw)
|
|
{
|
|
struct clk_regmap *rclk = to_clk_regmap(hw);
|
|
unsigned int val;
|
|
|
|
if (rclk->enable_is_inverted)
|
|
val = 0;
|
|
else
|
|
val = rclk->enable_mask;
|
|
|
|
return regmap_update_bits(rclk->regmap, rclk->enable_reg,
|
|
rclk->enable_mask, val);
|
|
}
|
|
EXPORT_SYMBOL_GPL(clk_enable_regmap);
|
|
|
|
/**
|
|
* clk_disable_regmap - standard disable() for regmap users
|
|
*
|
|
* @hw: clk to operate on
|
|
*
|
|
* Clocks that use regmap for their register I/O can set the
|
|
* enable_reg and enable_mask fields in their struct clk_regmap and then use
|
|
* this as their disable() operation, saving some code.
|
|
*/
|
|
void clk_disable_regmap(struct clk_hw *hw)
|
|
{
|
|
struct clk_regmap *rclk = to_clk_regmap(hw);
|
|
unsigned int val;
|
|
|
|
if (rclk->enable_is_inverted)
|
|
val = rclk->enable_mask;
|
|
else
|
|
val = 0;
|
|
|
|
regmap_update_bits(rclk->regmap, rclk->enable_reg, rclk->enable_mask,
|
|
val);
|
|
}
|
|
EXPORT_SYMBOL_GPL(clk_disable_regmap);
|
|
|
|
/**
|
|
* devm_clk_register_regmap - register a clk_regmap clock
|
|
*
|
|
* @rclk: clk to operate on
|
|
*
|
|
* Clocks that use regmap for their register I/O should register their
|
|
* clk_regmap struct via this function so that the regmap is initialized
|
|
* and so that the clock is registered with the common clock framework.
|
|
*/
|
|
struct clk *devm_clk_register_regmap(struct device *dev,
|
|
struct clk_regmap *rclk)
|
|
{
|
|
if (dev && dev_get_regmap(dev, NULL))
|
|
rclk->regmap = dev_get_regmap(dev, NULL);
|
|
else if (dev && dev->parent)
|
|
rclk->regmap = dev_get_regmap(dev->parent, NULL);
|
|
|
|
return devm_clk_register(dev, &rclk->hw);
|
|
}
|
|
EXPORT_SYMBOL_GPL(devm_clk_register_regmap);
|