Commit da0eb143 authored by Sudeep KarkadaNagesha's avatar Sudeep KarkadaNagesha
Browse files

cpufreq: arm_big_little: remove device tree parsing for cpu nodes 



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: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarSudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
parent e768f350

drivers/cpufreq/arm_big_little_dt.c

+14 −26
Original line number Diff line number Diff line
@@ -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;

	}



	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);

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