cpufreq: arm_big_little: remove compile-time dependency on BIG_LITTLE
With the addition of switcher code, there's compile-time dependency on
BIG_LITTLE to get arm_big_little driver compiling on ARM64. Since ARM64
will never add support for bL switcher, it's better to remove the
dependency so that the driver can be reused on ARM64 platforms.
This patch adds stubs to remove BIG_LITTLE dependency in the driver.
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c
index e4d75ca..f1e42f8 100644
--- a/drivers/cpufreq/arm_big_little.c
+++ b/drivers/cpufreq/arm_big_little.c
@@ -31,7 +31,6 @@
#include <linux/slab.h>
#include <linux/topology.h>
#include <linux/types.h>
-#include <asm/bL_switcher.h>
#include "arm_big_little.h"
@@ -41,12 +40,16 @@
#define MAX_CLUSTERS 2
#ifdef CONFIG_BL_SWITCHER
+#include <asm/bL_switcher.h>
static bool bL_switching_enabled;
#define is_bL_switching_enabled() bL_switching_enabled
#define set_switching_enabled(x) (bL_switching_enabled = (x))
#else
#define is_bL_switching_enabled() false
#define set_switching_enabled(x) do { } while (0)
+#define bL_switch_request(...) do { } while (0)
+#define bL_switcher_put_enabled() do { } while (0)
+#define bL_switcher_get_enabled() do { } while (0)
#endif
#define ACTUAL_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq << 1 : freq)
@@ -513,6 +516,7 @@
.attr = cpufreq_generic_attr,
};
+#ifdef CONFIG_BL_SWITCHER
static int bL_cpufreq_switcher_notifier(struct notifier_block *nfb,
unsigned long action, void *_arg)
{
@@ -545,6 +549,20 @@
.notifier_call = bL_cpufreq_switcher_notifier,
};
+static int __bLs_register_notifier(void)
+{
+ return bL_switcher_register_notifier(&bL_switcher_notifier);
+}
+
+static int __bLs_unregister_notifier(void)
+{
+ return bL_switcher_unregister_notifier(&bL_switcher_notifier);
+}
+#else
+static int __bLs_register_notifier(void) { return 0; }
+static int __bLs_unregister_notifier(void) { return 0; }
+#endif
+
int bL_cpufreq_register(struct cpufreq_arm_bL_ops *ops)
{
int ret, i;
@@ -562,8 +580,7 @@
arm_bL_ops = ops;
- ret = bL_switcher_get_enabled();
- set_switching_enabled(ret);
+ set_switching_enabled(bL_switcher_get_enabled());
for (i = 0; i < MAX_CLUSTERS; i++)
mutex_init(&cluster_lock[i]);
@@ -574,7 +591,7 @@
__func__, ops->name, ret);
arm_bL_ops = NULL;
} else {
- ret = bL_switcher_register_notifier(&bL_switcher_notifier);
+ ret = __bLs_register_notifier();
if (ret) {
cpufreq_unregister_driver(&bL_cpufreq_driver);
arm_bL_ops = NULL;
@@ -598,7 +615,7 @@
}
bL_switcher_get_enabled();
- bL_switcher_unregister_notifier(&bL_switcher_notifier);
+ __bLs_unregister_notifier();
cpufreq_unregister_driver(&bL_cpufreq_driver);
bL_switcher_put_enabled();
pr_info("%s: Un-registered platform driver: %s\n", __func__,