From: Sudeep KarkadaNagesha <sudeep.karkadanage...@arm.com>
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.
Cc: Viresh Kumar <viresh.ku...@linaro.org>
Cc: Dmitry Eremin-Solenikov <dbarysh...@gmail.com>
Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanage...@arm.com>
---
drivers/cpufreq/maple-cpufreq.c | 23 +++++++----------------
1 file changed, 7 insertions(+), 16 deletions(-)
diff --git a/drivers/cpufreq/maple-cpufreq.c b/drivers/cpufreq/maple-cpufreq.c
index cdd6291..bc7233b 100644
--- a/drivers/cpufreq/maple-cpufreq.c
+++ b/drivers/cpufreq/maple-cpufreq.c
@@ -19,6 +19,7 @@
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/sched.h>
+#include <linux/cpu.h>
#include <linux/cpufreq.h>
#include <linux/init.h>
#include <linux/completion.h>
@@ -201,7 +202,7 @@ static struct cpufreq_driver maple_cpufreq_driver = {
static int __init maple_cpufreq_init(void)
{
- struct device_node *cpus;
+ struct device *cpu_dev;
struct device_node *cpunode;
unsigned int psize;
unsigned long max_freq;
@@ -217,24 +218,17 @@ static int __init maple_cpufreq_init(void)
!of_machine_is_compatible("Momentum,Apache"))
return 0;
- cpus = of_find_node_by_path("/cpus");
- if (cpus == NULL) {
- DBG("No /cpus node !\n");
+ cpu_dev = get_cpu_device(0);
+ if (!cpu_dev) {
+ pr_err("failed to get cpu device\n");
return -ENODEV;
}
/* Get first CPU node */
- for (cpunode = NULL;
- (cpunode = of_get_next_child(cpus, cpunode)) != NULL;) {
- const u32 *reg = of_get_property(cpunode, "reg", NULL);
- if (reg == NULL || (*reg) != 0)
- continue;
- if (!strcmp(cpunode->type, "cpu"))
- break;
- }
+ cpunode = of_node_get(cpu_dev->of_node);
if (cpunode == NULL) {
printk(KERN_ERR "cpufreq: Can't find any CPU 0 node\n");
- goto bail_cpus;
+ goto bail_noprops;
}
/* Check 970FX for now */
@@ -290,14 +284,11 @@ static int __init maple_cpufreq_init(void)
rc = cpufreq_register_driver(&maple_cpufreq_driver);
of_node_put(cpunode);
- of_node_put(cpus);
return rc;
bail_noprops:
of_node_put(cpunode);
-bail_cpus:
- of_node_put(cpus);
return rc;
}
--
1.8.1.2
_______________________________________________
devicetree-discuss mailing list
devicetree-discuss@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/devicetree-discuss
