cpufreq: maple-cpufreq: 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.

Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>

diff --git a/drivers/cpufreq/maple-cpufreq.c b/drivers/cpufreq/maple-cpufreq.c
index cdd6291..f071dc4 100644 (file)
--- a/drivers/cpufreq/maple-cpufreq.c
+++ b/drivers/cpufreq/maple-cpufreq.c
@@ -24,7 +24,7 @@
 #include <linux/completion.h>
 #include <linux/mutex.h>
 #include <linux/time.h>
-#include <linux/of.h>
+#include <linux/of_device.h>
 
 #define DBG(fmt...) pr_debug(fmt)
 
@@ -201,7 +201,6 @@ static struct cpufreq_driver maple_cpufreq_driver = {
 
 static int __init maple_cpufreq_init(void)
 {
-       struct device_node *cpus;
        struct device_node *cpunode;
        unsigned int psize;
        unsigned long max_freq;
@@ -217,24 +216,11 @@ 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");
-               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_cpu_device_node_get(0);
        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 +276,11 @@ 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;
 }