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cpufreq: arm_big_little: remove device tree parsing for cpu nodes

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Now that the cpu device registration initialises the of_node(if available)
appropriately for all the cpus, parsing here is redundant.

This patch removes all DT parsing and uses cpu->of_node instead.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
This commit is contained in:
Sudeep KarkadaNagesha 2013-06-17 15:51:44 +01:00
parent e768f350c8
commit da0eb143db
1 changed files with 14 additions and 26 deletions
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40
drivers/cpufreq/arm_big_little_dt.c
View file

@ -19,12 +19,11 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/cpu.h>
#include <linux/cpufreq.h>
#include <linux/device.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/opp.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@ -34,27 +33,13 @@
/* get cpu node with valid operating-points */
static struct device_node *get_cpu_node_with_valid_op(int cpu)
{
struct device_node *np = NULL, *parent;
int count = 0;
struct device_node *np = of_cpu_device_node_get(cpu);
parent = of_find_node_by_path("/cpus");
if (!parent) {
pr_err("failed to find OF /cpus\n");
return NULL;
if (!of_get_property(np, "operating-points", NULL)) {
of_node_put(np);
np = NULL;
}
for_each_child_of_node(parent, np) {
if (count++ != cpu)
continue;
if (!of_get_property(np, "operating-points", NULL)) {
of_node_put(np);
np = NULL;
}
break;
}
of_node_put(parent);
return np;
}
@ -63,11 +48,12 @@ static int dt_init_opp_table(struct device *cpu_dev)
struct device_node *np;
int ret;
np = get_cpu_node_with_valid_op(cpu_dev->id);
if (!np)
return -ENODATA;
np = of_node_get(cpu_dev->of_node);
if (!np) {
pr_err("failed to find cpu%d node\n", cpu_dev->id);
return -ENOENT;
}
cpu_dev->of_node = np;
ret = of_init_opp_table(cpu_dev);
of_node_put(np);
@ -79,9 +65,11 @@ static int dt_get_transition_latency(struct device *cpu_dev)
struct device_node *np;
u32 transition_latency = CPUFREQ_ETERNAL;
np = get_cpu_node_with_valid_op(cpu_dev->id);
if (!np)
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);