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powercap/drivers/dtpm: Add CPU DT initialization support 

Based on the previous DT changes in the core code, use the 'setup'
callback to initialize the CPU DTPM backend.

Code is reorganized to stick to the DTPM table description. No
functional changes.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20220128163537.212248-4-daniel.lezcano@linaro.org
This commit is contained in:
Daniel Lezcano 2022-01-28 17:35:35 +01:00
parent 3759ec678e
commit 73dbcb6e37
1 changed files with 30 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
drivers/powercap/dtpm_cpu.c
View File

@ -21,6 +21,7 @@
#include <linux/cpuhotplug.h>
#include <linux/dtpm.h>
#include <linux/energy_model.h>
#include <linux/of.h>
#include <linux/pm_qos.h>
#include <linux/slab.h>
#include <linux/units.h>
@ -176,6 +177,17 @@ static int cpuhp_dtpm_cpu_offline(unsigned int cpu)
}
static int cpuhp_dtpm_cpu_online(unsigned int cpu)
{
struct dtpm_cpu *dtpm_cpu;
dtpm_cpu = per_cpu(dtpm_per_cpu, cpu);
if (dtpm_cpu)
return dtpm_update_power(&dtpm_cpu->dtpm);
return 0;
}
static int __dtpm_cpu_setup(int cpu, struct dtpm *parent)
{
struct dtpm_cpu *dtpm_cpu;
struct cpufreq_policy *policy;
@ -183,6 +195,10 @@ static int cpuhp_dtpm_cpu_online(unsigned int cpu)
char name[CPUFREQ_NAME_LEN];
int ret = -ENOMEM;
dtpm_cpu = per_cpu(dtpm_per_cpu, cpu);
if (dtpm_cpu)
return 0;
policy = cpufreq_cpu_get(cpu);
if (!policy)
return 0;
@ -191,10 +207,6 @@ static int cpuhp_dtpm_cpu_online(unsigned int cpu)
if (!pd)
return -EINVAL;
dtpm_cpu = per_cpu(dtpm_per_cpu, cpu);
if (dtpm_cpu)
return dtpm_update_power(&dtpm_cpu->dtpm);
dtpm_cpu = kzalloc(sizeof(*dtpm_cpu), GFP_KERNEL);
if (!dtpm_cpu)
return -ENOMEM;
@ -207,7 +219,7 @@ static int cpuhp_dtpm_cpu_online(unsigned int cpu)
snprintf(name, sizeof(name), "cpu%d-cpufreq", dtpm_cpu->cpu);
ret = dtpm_register(name, &dtpm_cpu->dtpm, NULL);
ret = dtpm_register(name, &dtpm_cpu->dtpm, parent);
if (ret)
goto out_kfree_dtpm_cpu;
@ -231,7 +243,18 @@ out_kfree_dtpm_cpu:
return ret;
}
static int __init dtpm_cpu_init(void)
static int dtpm_cpu_setup(struct dtpm *dtpm, struct device_node *np)
{
int cpu;
cpu = of_cpu_node_to_id(np);
if (cpu < 0)
return 0;
return __dtpm_cpu_setup(cpu, dtpm);
}
static int dtpm_cpu_init(void)
{
int ret;
@ -272,4 +295,5 @@ static int __init dtpm_cpu_init(void)
struct dtpm_subsys_ops dtpm_cpu_ops = {
.name = KBUILD_MODNAME,
.init = dtpm_cpu_init,
.setup = dtpm_cpu_setup,
};