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Commit 34e5a527 authored by Thomas Petazzoni's avatar Thomas Petazzoni Committed by Rafael J. Wysocki
Browse files

cpufreq: cpufreq-dt: extend with platform_data 



This commit extends the cpufreq-dt driver to take a platform_data
structure. This structure is for now used to tell the cpufreq-dt
driver the layout of the clocks on the platform, i.e whether all CPUs
share the same clock or whether each CPU has a separate clock.

Signed-off-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 51315cdf

drivers/cpufreq/cpufreq-dt.c

+15 −2
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <linux/cpu.h>

#include <linux/cpu_cooling.h>

#include <linux/cpufreq.h>

#include <linux/cpufreq-dt.h>

#include <linux/cpumask.h>

#include <linux/err.h>

#include <linux/module.h>
@@ -178,6 +179,7 @@ try_again: 


static int cpufreq_init(struct cpufreq_policy *policy)

{

	struct cpufreq_dt_platform_data *pd;

	struct cpufreq_frequency_table *freq_table;

	struct thermal_cooling_device *cdev;

	struct device_node *np;
@@ -265,9 +267,18 @@ static int cpufreq_init(struct cpufreq_policy *policy) 
	policy->driver_data = priv;



	policy->clk = cpu_clk;

	ret = cpufreq_generic_init(policy, freq_table, transition_latency);

	if (ret)

	ret = cpufreq_table_validate_and_show(policy, freq_table);

	if (ret) {

		dev_err(cpu_dev, "%s: invalid frequency table: %d\n", __func__,

			ret);

		goto out_cooling_unregister;

	}



	policy->cpuinfo.transition_latency = transition_latency;



	pd = cpufreq_get_driver_data();

	if (pd && !pd->independent_clocks)

		cpumask_setall(policy->cpus);



	of_node_put(np);
@@ -335,6 +346,8 @@ static int dt_cpufreq_probe(struct platform_device *pdev) 
	if (!IS_ERR(cpu_reg))

		regulator_put(cpu_reg);



	dt_cpufreq_driver.driver_data = dev_get_platdata(&pdev->dev);



	ret = cpufreq_register_driver(&dt_cpufreq_driver);

	if (ret)

		dev_err(cpu_dev, "failed register driver: %d\n", ret);

include/linux/cpufreq-dt.h

0 → 100644
+22 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2014 Marvell

 * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */



#ifndef __CPUFREQ_DT_H__

#define __CPUFREQ_DT_H__



struct cpufreq_dt_platform_data {

	/*

	 * True when each CPU has its own clock to control its

	 * frequency, false when all CPUs are controlled by a single

	 * clock.

	 */

	bool independent_clocks;

};



#endif /* __CPUFREQ_DT_H__ */