Commit 9f123def authored by Viresh Kumar's avatar Viresh Kumar Committed by Rafael J. Wysocki
Browse files

cpufreq: mvebu: Move cpufreq code into drivers/cpufreq/ 



Move cpufreq bits for mvebu into drivers/cpufreq/ directory, that's
where they really belong to.

Compiled tested only.

Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent eb96924a

MAINTAINERS

+1 −0
Original line number Diff line number Diff line
@@ -1322,6 +1322,7 @@ F: drivers/rtc/rtc-armada38x.c 
F:	arch/arm/boot/dts/armada*

F:	arch/arm/boot/dts/kirkwood*

F:	arch/arm64/boot/dts/marvell/armada*

F:	drivers/cpufreq/mvebu-cpufreq.c





ARM/Marvell Berlin SoC support

arch/arm/mach-mvebu/pmsu.c

+0 −85
Original line number Diff line number Diff line
@@ -28,7 +28,6 @@ 
#include <linux/of_address.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/pm_opp.h>

#include <linux/resource.h>

#include <linux/slab.h>

#include <linux/smp.h>
@@ -607,87 +606,3 @@ int mvebu_pmsu_dfs_request(int cpu) 


	return 0;

}
 


static int __init armada_xp_pmsu_cpufreq_init(void)

{

	struct device_node *np;

	struct resource res;

	int ret, cpu;



	if (!of_machine_is_compatible("marvell,armadaxp"))

		return 0;



	/*

	 * In order to have proper cpufreq handling, we need to ensure

	 * that the Device Tree description of the CPU clock includes

	 * the definition of the PMU DFS registers. If not, we do not

	 * register the clock notifier and the cpufreq driver. This

	 * piece of code is only for compatibility with old Device

	 * Trees.

	 */

	np = of_find_compatible_node(NULL, NULL, "marvell,armada-xp-cpu-clock");

	if (!np)

		return 0;



	ret = of_address_to_resource(np, 1, &res);

	if (ret) {

		pr_warn(FW_WARN "not enabling cpufreq, deprecated armada-xp-cpu-clock binding\n");

		of_node_put(np);

		return 0;

	}



	of_node_put(np);



	/*

	 * For each CPU, this loop registers the operating points

	 * supported (which are the nominal CPU frequency and half of

	 * it), and registers the clock notifier that will take care

	 * of doing the PMSU part of a frequency transition.

	 */

	for_each_possible_cpu(cpu) {

		struct device *cpu_dev;

		struct clk *clk;

		int ret;



		cpu_dev = get_cpu_device(cpu);

		if (!cpu_dev) {

			pr_err("Cannot get CPU %d\n", cpu);

			continue;

		}



		clk = clk_get(cpu_dev, 0);

		if (IS_ERR(clk)) {

			pr_err("Cannot get clock for CPU %d\n", cpu);

			return PTR_ERR(clk);

		}



		/*

		 * In case of a failure of dev_pm_opp_add(), we don't

		 * bother with cleaning up the registered OPP (there's

		 * no function to do so), and simply cancel the

		 * registration of the cpufreq device.

		 */

		ret = dev_pm_opp_add(cpu_dev, clk_get_rate(clk), 0);

		if (ret) {

			clk_put(clk);

			return ret;

		}



		ret = dev_pm_opp_add(cpu_dev, clk_get_rate(clk) / 2, 0);

		if (ret) {

			clk_put(clk);

			return ret;

		}



		ret = dev_pm_opp_set_sharing_cpus(cpu_dev,

						  cpumask_of(cpu_dev->id));

		if (ret)

			dev_err(cpu_dev, "%s: failed to mark OPPs as shared: %d\n",

				__func__, ret);

	}



	platform_device_register_simple("cpufreq-dt", -1, NULL, 0);

	return 0;

}



device_initcall(armada_xp_pmsu_cpufreq_init);

drivers/cpufreq/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -79,6 +79,7 @@ obj-$(CONFIG_ARM_TEGRA20_CPUFREQ) += tegra20-cpufreq.o 
obj-$(CONFIG_ARM_TEGRA124_CPUFREQ)	+= tegra124-cpufreq.o

obj-$(CONFIG_ARM_VEXPRESS_SPC_CPUFREQ)	+= vexpress-spc-cpufreq.o

obj-$(CONFIG_ACPI_CPPC_CPUFREQ) += cppc_cpufreq.o

obj-$(CONFIG_MACH_MVEBU_V7)		+= mvebu-cpufreq.o





##################################################################################

drivers/cpufreq/mvebu-cpufreq.c

0 → 100644
+107 −0
Original line number Diff line number Diff line 
/*

 * CPUFreq support for Armada 370/XP platforms.

 *

 * Copyright (C) 2012-2016 Marvell

 *

 * Yehuda Yitschak <yehuday@marvell.com>

 * Gregory Clement <gregory.clement@free-electrons.com>

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

 *

 * This file is licensed under the terms of the GNU General Public

 * License version 2.  This program is licensed "as is" without any

 * warranty of any kind, whether express or implied.

 */



#define pr_fmt(fmt) "mvebu-pmsu: " fmt



#include <linux/clk.h>

#include <linux/cpu.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/of_address.h>

#include <linux/platform_device.h>

#include <linux/pm_opp.h>

#include <linux/resource.h>



static int __init armada_xp_pmsu_cpufreq_init(void)

{

	struct device_node *np;

	struct resource res;

	int ret, cpu;



	if (!of_machine_is_compatible("marvell,armadaxp"))

		return 0;



	/*

	 * In order to have proper cpufreq handling, we need to ensure

	 * that the Device Tree description of the CPU clock includes

	 * the definition of the PMU DFS registers. If not, we do not

	 * register the clock notifier and the cpufreq driver. This

	 * piece of code is only for compatibility with old Device

	 * Trees.

	 */

	np = of_find_compatible_node(NULL, NULL, "marvell,armada-xp-cpu-clock");

	if (!np)

		return 0;



	ret = of_address_to_resource(np, 1, &res);

	if (ret) {

		pr_warn(FW_WARN "not enabling cpufreq, deprecated armada-xp-cpu-clock binding\n");

		of_node_put(np);

		return 0;

	}



	of_node_put(np);



	/*

	 * For each CPU, this loop registers the operating points

	 * supported (which are the nominal CPU frequency and half of

	 * it), and registers the clock notifier that will take care

	 * of doing the PMSU part of a frequency transition.

	 */

	for_each_possible_cpu(cpu) {

		struct device *cpu_dev;

		struct clk *clk;

		int ret;



		cpu_dev = get_cpu_device(cpu);

		if (!cpu_dev) {

			pr_err("Cannot get CPU %d\n", cpu);

			continue;

		}



		clk = clk_get(cpu_dev, 0);

		if (IS_ERR(clk)) {

			pr_err("Cannot get clock for CPU %d\n", cpu);

			return PTR_ERR(clk);

		}



		/*

		 * In case of a failure of dev_pm_opp_add(), we don't

		 * bother with cleaning up the registered OPP (there's

		 * no function to do so), and simply cancel the

		 * registration of the cpufreq device.

		 */

		ret = dev_pm_opp_add(cpu_dev, clk_get_rate(clk), 0);

		if (ret) {

			clk_put(clk);

			return ret;

		}



		ret = dev_pm_opp_add(cpu_dev, clk_get_rate(clk) / 2, 0);

		if (ret) {

			clk_put(clk);

			return ret;

		}



		ret = dev_pm_opp_set_sharing_cpus(cpu_dev,

						  cpumask_of(cpu_dev->id));

		if (ret)

			dev_err(cpu_dev, "%s: failed to mark OPPs as shared: %d\n",

				__func__, ret);

	}



	platform_device_register_simple("cpufreq-dt", -1, NULL, 0);

	return 0;

}

device_initcall(armada_xp_pmsu_cpufreq_init);