[PATCH V9 08/17] cpufreq: Use enum for cpufreq flags that use BIT()

[Viresh Kumar <viresh.kumar@linaro.org>]

The BIT() macro is too complex for Rust's bindgen to interpret as
integer constants. This results in many of the cpufreq macros being
undefined in Rust auto-generated bindings. By replacing the "#define"
macros with an "enum", we ensure that bindgen can properly evaluate
these values, enabling their seamless use in Rust code.

No intentional functional impact.

Suggested-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 include/linux/cpufreq.h | 96 ++++++++++++++++++++++-------------------
 1 file changed, 51 insertions(+), 45 deletions(-)

diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 400fee6427a5..354ae35fe708 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -298,11 +298,12 @@ static inline void cpufreq_stats_record_transition(struct cpufreq_policy *policy
  *                      CPUFREQ DRIVER INTERFACE                     *
  *********************************************************************/
 
-#define CPUFREQ_RELATION_L 0  /* lowest frequency at or above target */
-#define CPUFREQ_RELATION_H 1  /* highest frequency below or at target */
-#define CPUFREQ_RELATION_C 2  /* closest frequency to target */
-/* relation flags */
-#define CPUFREQ_RELATION_E BIT(2) /* Get if possible an efficient frequency */
+enum {
+	CPUFREQ_RELATION_L = 0, /* lowest frequency at or above target */
+	CPUFREQ_RELATION_H = BIT(0), /* highest frequency below or at target */
+	CPUFREQ_RELATION_C = BIT(1), /* closest frequency to target */
+	CPUFREQ_RELATION_E = BIT(2), /* Get if possible an efficient frequency */
+};
 
 #define CPUFREQ_RELATION_LE (CPUFREQ_RELATION_L | CPUFREQ_RELATION_E)
 #define CPUFREQ_RELATION_HE (CPUFREQ_RELATION_H | CPUFREQ_RELATION_E)
@@ -424,52 +425,57 @@ struct cpufreq_driver {
 
 /* flags */
 
-/*
- * Set by drivers that need to update internal upper and lower boundaries along
- * with the target frequency and so the core and governors should also invoke
- * the diver if the target frequency does not change, but the policy min or max
- * may have changed.
- */
-#define CPUFREQ_NEED_UPDATE_LIMITS		BIT(0)
+enum {
+	/*
+	 * Set by drivers that need to update internal upper and lower
+	 * boundaries along with the target frequency and so the core and
+	 * governors should also invoke the diver if the target frequency does
+	 * not change, but the policy min or max may have changed.
+	 */
+	CPUFREQ_NEED_UPDATE_LIMITS		= BIT(0),
 
-/* loops_per_jiffy or other kernel "constants" aren't affected by frequency transitions */
-#define CPUFREQ_CONST_LOOPS			BIT(1)
+	/*
+	 * loops_per_jiffy or other kernel "constants" aren't affected by
+	 * frequency transitions.
+	 */
+	CPUFREQ_CONST_LOOPS			= BIT(1),
 
-/*
- * Set by drivers that want the core to automatically register the cpufreq
- * driver as a thermal cooling device.
- */
-#define CPUFREQ_IS_COOLING_DEV			BIT(2)
+	/*
+	 * Set by drivers that want the core to automatically register the
+	 * cpufreq driver as a thermal cooling device.
+	 */
+	CPUFREQ_IS_COOLING_DEV			= BIT(2),
 
-/*
- * This should be set by platforms having multiple clock-domains, i.e.
- * supporting multiple policies. With this sysfs directories of governor would
- * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same
- * governor with different tunables for different clusters.
- */
-#define CPUFREQ_HAVE_GOVERNOR_PER_POLICY	BIT(3)
+	/*
+	 * This should be set by platforms having multiple clock-domains, i.e.
+	 * supporting multiple policies. With this sysfs directories of governor
+	 * would be created in cpu/cpu<num>/cpufreq/ directory and so they can
+	 * use the same governor with different tunables for different clusters.
+	 */
+	CPUFREQ_HAVE_GOVERNOR_PER_POLICY	= BIT(3),
 
-/*
- * Driver will do POSTCHANGE notifications from outside of their ->target()
- * routine and so must set cpufreq_driver->flags with this flag, so that core
- * can handle them specially.
- */
-#define CPUFREQ_ASYNC_NOTIFICATION		BIT(4)
+	/*
+	 * Driver will do POSTCHANGE notifications from outside of their
+	 * ->target() routine and so must set cpufreq_driver->flags with this
+	 *  flag, so that core can handle them specially.
+	 */
+	CPUFREQ_ASYNC_NOTIFICATION		= BIT(4),
 
-/*
- * Set by drivers which want cpufreq core to check if CPU is running at a
- * frequency present in freq-table exposed by the driver. For these drivers if
- * CPU is found running at an out of table freq, we will try to set it to a freq
- * from the table. And if that fails, we will stop further boot process by
- * issuing a BUG_ON().
- */
-#define CPUFREQ_NEED_INITIAL_FREQ_CHECK	BIT(5)
+	/*
+	 * Set by drivers which want cpufreq core to check if CPU is running at
+	 * a frequency present in freq-table exposed by the driver. For these
+	 * drivers if CPU is found running at an out of table freq, we will try
+	 * to set it to a freq from the table. And if that fails, we will stop
+	 * further boot process by issuing a BUG_ON().
+	 */
+	CPUFREQ_NEED_INITIAL_FREQ_CHECK		= BIT(5),
 
-/*
- * Set by drivers to disallow use of governors with "dynamic_switching" flag
- * set.
- */
-#define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING	BIT(6)
+	/*
+	 * Set by drivers to disallow use of governors with "dynamic_switching"
+	 * flag set.
+	 */
+	CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING	= BIT(6),
+};
 
 int cpufreq_register_driver(struct cpufreq_driver *driver_data);
 void cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
-- 
2.31.1.272.g89b43f80a514