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Commit faa9650c authored by Vivek Aknurwar's avatar Vivek Aknurwar
Browse files

clk: qcom: Maintain qcom_regmap_list of qcom clks 



Providers adds ops for list rate and print reg debug nodes
to print necessary debug information, these nodes
can not be added to clk framework and is moved down to provider level.
Since provider does not have complete knowledge on clks owned
at clk framework, providers can not blindly typecast clks owned
by clk framework to call its list/print ops.
A separate qcom_regmap_list is maintained during qcom clk
registration with clk framework. So as when debug list/print
calls are called, provider have knowledge of qcom clks
and only call respective ops on qcom clks maintained
in clk_regmap_list.

Providers can use this API to know if clk is qcom regmaped clk.

Change-Id: I3e4d8280c8fa0c692f855c0d6659dd14f95008df
Signed-off-by: default avatarVivek Aknurwar <viveka@codeaurora.org>
parent ec907937

drivers/clk/qcom/clk-regmap.c

+34 −1
Original line number Diff line number Diff line
@@ -10,6 +10,8 @@ 


#include "clk-regmap.h"



static LIST_HEAD(clk_regmap_list);



/**

 * clk_is_enabled_regmap - standard is_enabled() for regmap users

 *
@@ -230,6 +232,30 @@ void clk_unprepare_regmap(struct clk_hw *hw) 
}

EXPORT_SYMBOL(clk_unprepare_regmap);



/**

 * clk_is_regmap_clk - Checks if clk is a regmap clk

 *

 * @hw: clk to check on

 *

 * Iterate over maintained clk regmap list to know

 * if concern clk is regmap

 *

 * Returns true on success, false otherwise.

 */

bool clk_is_regmap_clk(struct clk_hw *hw)

{

	struct clk_regmap *rclk;



	if (hw) {

		list_for_each_entry(rclk, &clk_regmap_list, list_node)

			if (&rclk->hw  == hw)

				return true;

	}



	return false;

}

EXPORT_SYMBOL(clk_is_regmap_clk);



/**

 * devm_clk_register_regmap - register a clk_regmap clock

 *
@@ -238,14 +264,21 @@ EXPORT_SYMBOL(clk_unprepare_regmap); 
 * 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.

 * Also maintain clk-regmap clks list for providers use.

 */

int devm_clk_register_regmap(struct device *dev, struct clk_regmap *rclk)

{

	int ret;



	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_hw_register(dev, &rclk->hw);

	ret = devm_clk_hw_register(dev, &rclk->hw);

	if (!ret)

		list_add(&rclk->list_node, &clk_regmap_list);



	return ret;

}

EXPORT_SYMBOL_GPL(devm_clk_register_regmap);

drivers/clk/qcom/clk-regmap.h

+4 −1
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-only */

/* Copyright (c) 2014, 2016-2019, The Linux Foundation. All rights reserved. */

/* Copyright (c) 2014, 2016-2020, The Linux Foundation. All rights reserved. */



#ifndef __QCOM_CLK_REGMAP_H__

#define __QCOM_CLK_REGMAP_H__
@@ -49,6 +49,7 @@ struct clk_regmap { 
	bool enable_is_inverted;

	struct clk_vdd_class_data vdd_data;

	struct clk_regmap_ops *ops;

	struct list_head list_node;

};

#define to_clk_regmap(_hw) container_of(_hw, struct clk_regmap, hw)
@@ -63,6 +64,8 @@ int clk_post_change_regmap(struct clk_hw *hw, unsigned long old_rate, 
			unsigned long cur_rate);

int devm_clk_register_regmap(struct device *dev, struct clk_regmap *rclk);



bool clk_is_regmap_clk(struct clk_hw *hw);



struct clk_register_data {

	char *name;

	u32 offset;