PM / OPP: Move cpu specific code to opp/cpu.c
Move cpu device specific code out of generic opp library, and add it to cpu.c. Along with that, create a core-internal opp.h header, which will be used to share structures and function prototypes within opp core. Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar
committed by
Rafael J. Wysocki
Rafael J. Wysocki
parent
33692dc381
commit
f59d3ee848
@@ -10,17 +10,18 @@
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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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#include <linux/cpu.h>
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#include <linux/cpufreq.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/errno.h>
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#include <linux/export.h>
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#include <linux/kernel.h>
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#include <linux/pm_opp.h>
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#include <linux/rcupdate.h>
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#include <linux/of.h>
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#include <linux/slab.h>
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#include "opp.h"
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#ifdef CONFIG_CPU_FREQ
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/**
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* dev_pm_opp_init_cpufreq_table() - create a cpufreq table for a device
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* @dev: device for which we do this operation
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@@ -114,3 +115,154 @@ void dev_pm_opp_free_cpufreq_table(struct device *dev,
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_free_cpufreq_table);
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#endif /* CONFIG_CPU_FREQ */
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/* Required only for V1 bindings, as v2 can manage it from DT itself */
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int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
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{
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struct device_list_opp *list_dev;
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struct device_opp *dev_opp;
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struct device *dev;
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int cpu, ret = 0;
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rcu_read_lock();
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dev_opp = _find_device_opp(cpu_dev);
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if (IS_ERR(dev_opp)) {
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ret = -EINVAL;
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goto out_rcu_read_unlock;
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}
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for_each_cpu(cpu, cpumask) {
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if (cpu == cpu_dev->id)
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continue;
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dev = get_cpu_device(cpu);
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if (!dev) {
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dev_err(cpu_dev, "%s: failed to get cpu%d device\n",
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__func__, cpu);
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continue;
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}
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list_dev = _add_list_dev(dev, dev_opp);
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if (!list_dev) {
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dev_err(dev, "%s: failed to add list-dev for cpu%d device\n",
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__func__, cpu);
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continue;
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}
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}
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out_rcu_read_unlock:
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rcu_read_unlock();
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return 0;
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_set_sharing_cpus);
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#ifdef CONFIG_OF
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void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask)
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{
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struct device *cpu_dev;
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int cpu;
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WARN_ON(cpumask_empty(cpumask));
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for_each_cpu(cpu, cpumask) {
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cpu_dev = get_cpu_device(cpu);
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if (!cpu_dev) {
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pr_err("%s: failed to get cpu%d device\n", __func__,
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cpu);
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continue;
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}
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dev_pm_opp_of_remove_table(cpu_dev);
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}
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_remove_table);
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int dev_pm_opp_of_cpumask_add_table(cpumask_var_t cpumask)
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{
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struct device *cpu_dev;
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int cpu, ret = 0;
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WARN_ON(cpumask_empty(cpumask));
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for_each_cpu(cpu, cpumask) {
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cpu_dev = get_cpu_device(cpu);
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if (!cpu_dev) {
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pr_err("%s: failed to get cpu%d device\n", __func__,
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cpu);
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continue;
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}
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ret = dev_pm_opp_of_add_table(cpu_dev);
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if (ret) {
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pr_err("%s: couldn't find opp table for cpu:%d, %d\n",
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__func__, cpu, ret);
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/* Free all other OPPs */
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dev_pm_opp_of_cpumask_remove_table(cpumask);
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break;
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}
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_add_table);
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/*
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* Works only for OPP v2 bindings.
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*
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* cpumask should be already set to mask of cpu_dev->id.
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* Returns -ENOENT if operating-points-v2 bindings aren't supported.
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*/
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int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
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{
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struct device_node *np, *tmp_np;
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struct device *tcpu_dev;
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int cpu, ret = 0;
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/* Get OPP descriptor node */
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np = _of_get_opp_desc_node(cpu_dev);
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if (!np) {
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dev_dbg(cpu_dev, "%s: Couldn't find opp node: %ld\n", __func__,
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PTR_ERR(np));
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return -ENOENT;
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}
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/* OPPs are shared ? */
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if (!of_property_read_bool(np, "opp-shared"))
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goto put_cpu_node;
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for_each_possible_cpu(cpu) {
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if (cpu == cpu_dev->id)
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continue;
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tcpu_dev = get_cpu_device(cpu);
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if (!tcpu_dev) {
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dev_err(cpu_dev, "%s: failed to get cpu%d device\n",
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__func__, cpu);
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ret = -ENODEV;
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goto put_cpu_node;
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}
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/* Get OPP descriptor node */
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tmp_np = _of_get_opp_desc_node(tcpu_dev);
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if (!tmp_np) {
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dev_err(tcpu_dev, "%s: Couldn't find opp node: %ld\n",
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__func__, PTR_ERR(tmp_np));
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ret = PTR_ERR(tmp_np);
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goto put_cpu_node;
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}
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/* CPUs are sharing opp node */
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if (np == tmp_np)
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cpumask_set_cpu(cpu, cpumask);
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of_node_put(tmp_np);
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}
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put_cpu_node:
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of_node_put(np);
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return ret;
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_sharing_cpus);
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#endif
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