cpufreq: remove unused arm_big_little_dt driver
Most of the ARM platforms used cpufreq-dt driver irrespective of whether it's big-little(HMP) or SMP system. This arm_big_little_dt is not used actively at all. So let's remove the driver, so that it need not be maintained. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>hifive-unleashed-5.1
Sudeep Holla
Rafael J. Wysocki
parent
a7314405d8
commit
f174e49e49
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@ -3838,7 +3838,6 @@ W: http://www.arm.com/products/processors/technologies/biglittleprocessing.php
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S: Maintained
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F: drivers/cpufreq/arm_big_little.h
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F: drivers/cpufreq/arm_big_little.c
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F: drivers/cpufreq/arm_big_little_dt.c
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CPU POWER MONITORING SUBSYSTEM
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M: Thomas Renninger <trenn@suse.com>
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@ -35,13 +35,6 @@ config ARM_BIG_LITTLE_CPUFREQ
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help
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This enables the Generic CPUfreq driver for ARM big.LITTLE platforms.
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config ARM_DT_BL_CPUFREQ
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tristate "Generic probing via DT for ARM big LITTLE CPUfreq driver"
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depends on ARM_BIG_LITTLE_CPUFREQ && OF
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help
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This enables probing via DT for Generic CPUfreq driver for ARM
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big.LITTLE platform. This gets frequency tables from DT.
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config ARM_SCPI_CPUFREQ
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tristate "SCPI based CPUfreq driver"
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depends on ARM_SCPI_PROTOCOL && COMMON_CLK_SCPI
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@ -48,9 +48,6 @@ obj-$(CONFIG_X86_SFI_CPUFREQ) += sfi-cpufreq.o
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##################################################################################
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# ARM SoC drivers
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obj-$(CONFIG_ARM_BIG_LITTLE_CPUFREQ) += arm_big_little.o
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# big LITTLE per platform glues. Keep DT_BL_CPUFREQ as the last entry in all big
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# LITTLE drivers, so that it is probed last.
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obj-$(CONFIG_ARM_DT_BL_CPUFREQ) += arm_big_little_dt.o
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obj-$(CONFIG_ARM_ARMADA_37XX_CPUFREQ) += armada-37xx-cpufreq.o
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obj-$(CONFIG_ARM_BRCMSTB_AVS_CPUFREQ) += brcmstb-avs-cpufreq.o
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@ -1,100 +0,0 @@
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/*
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* Generic big.LITTLE CPUFreq Interface driver
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*
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* It provides necessary ops to arm_big_little cpufreq driver and gets
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* Frequency information from Device Tree. Freq table in DT must be in KHz.
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*
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* Copyright (C) 2013 Linaro.
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* Viresh Kumar <viresh.kumar@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/cpufreq.h>
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#include <linux/device.h>
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#include <linux/export.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/pm_opp.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include "arm_big_little.h"
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/* get cpu node with valid operating-points */
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static struct device_node *get_cpu_node_with_valid_op(int cpu)
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{
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struct device_node *np = of_cpu_device_node_get(cpu);
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if (!of_get_property(np, "operating-points", NULL)) {
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of_node_put(np);
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np = NULL;
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}
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return np;
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}
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static int dt_get_transition_latency(struct device *cpu_dev)
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{
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struct device_node *np;
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u32 transition_latency = CPUFREQ_ETERNAL;
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np = of_node_get(cpu_dev->of_node);
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if (!np) {
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pr_info("Failed to find cpu node. Use CPUFREQ_ETERNAL transition latency\n");
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return CPUFREQ_ETERNAL;
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}
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of_property_read_u32(np, "clock-latency", &transition_latency);
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of_node_put(np);
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pr_debug("%s: clock-latency: %d\n", __func__, transition_latency);
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return transition_latency;
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}
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static const struct cpufreq_arm_bL_ops dt_bL_ops = {
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.name = "dt-bl",
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.get_transition_latency = dt_get_transition_latency,
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.init_opp_table = dev_pm_opp_of_cpumask_add_table,
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.free_opp_table = dev_pm_opp_of_cpumask_remove_table,
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};
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static int generic_bL_probe(struct platform_device *pdev)
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{
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struct device_node *np;
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np = get_cpu_node_with_valid_op(0);
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if (!np)
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return -ENODEV;
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of_node_put(np);
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return bL_cpufreq_register(&dt_bL_ops);
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}
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static int generic_bL_remove(struct platform_device *pdev)
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{
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bL_cpufreq_unregister(&dt_bL_ops);
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return 0;
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}
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static struct platform_driver generic_bL_platdrv = {
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.driver = {
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.name = "arm-bL-cpufreq-dt",
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},
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.probe = generic_bL_probe,
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.remove = generic_bL_remove,
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};
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module_platform_driver(generic_bL_platdrv);
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MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
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MODULE_DESCRIPTION("Generic ARM big LITTLE cpufreq driver via DT");
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MODULE_LICENSE("GPL v2");
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