cpufreq: remove unused arm_big_little_dt driver (f174e49e) · Commits · 戴 / test

MAINTAINERS

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		@@ -3838,7 +3838,6 @@ W: http://www.arm.com/products/processors/technologies/biglittleprocessing.php
		S: Maintained
		F: drivers/cpufreq/arm_big_little.h
		F: drivers/cpufreq/arm_big_little.c
		F: drivers/cpufreq/arm_big_little_dt.c

		CPU POWER MONITORING SUBSYSTEM
		M: Thomas Renninger <trenn@suse.com>

drivers/cpufreq/Kconfig.arm

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		@@ -35,13 +35,6 @@ config ARM_BIG_LITTLE_CPUFREQ
		help
		This enables the Generic CPUfreq driver for ARM big.LITTLE platforms.

		config ARM_DT_BL_CPUFREQ
		tristate "Generic probing via DT for ARM big LITTLE CPUfreq driver"
		depends on ARM_BIG_LITTLE_CPUFREQ && OF
		help
		This enables probing via DT for Generic CPUfreq driver for ARM
		big.LITTLE platform. This gets frequency tables from DT.

		config ARM_SCPI_CPUFREQ
		tristate "SCPI based CPUfreq driver"
		depends on ARM_SCPI_PROTOCOL && COMMON_CLK_SCPI

drivers/cpufreq/Makefile

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		@@ -48,9 +48,6 @@ obj-$(CONFIG_X86_SFI_CPUFREQ) += sfi-cpufreq.o
		##################################################################################
		# ARM SoC drivers
		obj-$(CONFIG_ARM_BIG_LITTLE_CPUFREQ) += arm_big_little.o
		# big LITTLE per platform glues. Keep DT_BL_CPUFREQ as the last entry in all big
		# LITTLE drivers, so that it is probed last.
		obj-$(CONFIG_ARM_DT_BL_CPUFREQ) += arm_big_little_dt.o

		obj-$(CONFIG_ARM_ARMADA_37XX_CPUFREQ) += armada-37xx-cpufreq.o
		obj-$(CONFIG_ARM_BRCMSTB_AVS_CPUFREQ) += brcmstb-avs-cpufreq.o

drivers/cpufreq/arm_big_little_dt.c

deleted100644 → 0

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		/*
		* Generic big.LITTLE CPUFreq Interface driver
		*
		* It provides necessary ops to arm_big_little cpufreq driver and gets
		* Frequency information from Device Tree. Freq table in DT must be in KHz.
		*
		* Copyright (C) 2013 Linaro.
		* Viresh Kumar <viresh.kumar@linaro.org>
		*
		* 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.
		*
		* This program is distributed "as is" WITHOUT ANY WARRANTY of any
		* kind, whether express or implied; without even the implied warranty
		* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*/

		#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

		#include <linux/cpufreq.h>
		#include <linux/device.h>
		#include <linux/export.h>
		#include <linux/module.h>
		#include <linux/of_device.h>
		#include <linux/pm_opp.h>
		#include <linux/platform_device.h>
		#include <linux/slab.h>
		#include <linux/types.h>
		#include "arm_big_little.h"

		/* get cpu node with valid operating-points */
		static struct device_node *get_cpu_node_with_valid_op(int cpu)
		{
		struct device_node *np = of_cpu_device_node_get(cpu);

		if (!of_get_property(np, "operating-points", NULL)) {
		of_node_put(np);
		np = NULL;
		}

		return np;
		}

		static int dt_get_transition_latency(struct device *cpu_dev)
		{
		struct device_node *np;
		u32 transition_latency = CPUFREQ_ETERNAL;

		np = of_node_get(cpu_dev->of_node);
		if (!np) {
		pr_info("Failed to find cpu node. Use CPUFREQ_ETERNAL transition latency\n");
		return CPUFREQ_ETERNAL;
		}

		of_property_read_u32(np, "clock-latency", &transition_latency);
		of_node_put(np);

		pr_debug("%s: clock-latency: %d\n", __func__, transition_latency);
		return transition_latency;
		}

		static const struct cpufreq_arm_bL_ops dt_bL_ops = {
		.name = "dt-bl",
		.get_transition_latency = dt_get_transition_latency,
		.init_opp_table = dev_pm_opp_of_cpumask_add_table,
		.free_opp_table = dev_pm_opp_of_cpumask_remove_table,
		};

		static int generic_bL_probe(struct platform_device *pdev)
		{
		struct device_node *np;

		np = get_cpu_node_with_valid_op(0);
		if (!np)
		return -ENODEV;

		of_node_put(np);
		return bL_cpufreq_register(&dt_bL_ops);
		}

		static int generic_bL_remove(struct platform_device *pdev)
		{
		bL_cpufreq_unregister(&dt_bL_ops);
		return 0;
		}

		static struct platform_driver generic_bL_platdrv = {
		.driver = {
		.name = "arm-bL-cpufreq-dt",
		},
		.probe = generic_bL_probe,
		.remove = generic_bL_remove,
		};
		module_platform_driver(generic_bL_platdrv);

		MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
		MODULE_DESCRIPTION("Generic ARM big LITTLE cpufreq driver via DT");
		MODULE_LICENSE("GPL v2");

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