Merge back cpufreq material for 6.12

Author: rafaeljw

drivers/cpufreq/cpufreq.c

@@ -575,30 +575,11 @@ unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy)
 		return policy->transition_delay_us;
 
 	latency = policy->cpuinfo.transition_latency / NSEC_PER_USEC;
-	if (latency) {
-		unsigned int max_delay_us = 2 * MSEC_PER_SEC;
+	if (latency)
+		/* Give a 50% breathing room between updates */
+		return latency + (latency >> 1);
 
-		/*
-		 * If the platform already has high transition_latency, use it
-		 * as-is.
-		 */
-		if (latency > max_delay_us)
-			return latency;
-
-		/*
-		 * For platforms that can change the frequency very fast (< 2
-		 * us), the above formula gives a decent transition delay. But
-		 * for platforms where transition_latency is in milliseconds, it
-		 * ends up giving unrealistic values.
-		 *
-		 * Cap the default transition delay to 2 ms, which seems to be
-		 * a reasonable amount of time after which we should reevaluate
-		 * the frequency.
-		 */
-		return min(latency * LATENCY_MULTIPLIER, max_delay_us);
-	}
-
-	return LATENCY_MULTIPLIER;
+	return USEC_PER_MSEC;
 }
 EXPORT_SYMBOL_GPL(cpufreq_policy_transition_delay_us);
 

drivers/cpufreq/intel_pstate.c

@@ -2425,6 +2425,10 @@ static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] __initconst = {
 	X86_MATCH(INTEL_ICELAKE_X,		core_funcs),
 	X86_MATCH(INTEL_SAPPHIRERAPIDS_X,	core_funcs),
 	X86_MATCH(INTEL_EMERALDRAPIDS_X,	core_funcs),
+	X86_MATCH(INTEL_GRANITERAPIDS_D,	core_funcs),
+	X86_MATCH(INTEL_GRANITERAPIDS_X,	core_funcs),
+	X86_MATCH(INTEL_ATOM_CRESTMONT,		core_funcs),
+	X86_MATCH(INTEL_ATOM_CRESTMONT_X,	core_funcs),
 	{}
 };
 #endif

drivers/cpufreq/maple-cpufreq.c

@@ -238,4 +238,5 @@ static int __init maple_cpufreq_init(void)
 module_init(maple_cpufreq_init);
 
 
+MODULE_DESCRIPTION("cpufreq driver for Maple 970FX/970MP boards");
 MODULE_LICENSE("GPL");

drivers/cpufreq/pasemi-cpufreq.c

@@ -269,5 +269,6 @@ static void __exit pas_cpufreq_exit(void)
 module_init(pas_cpufreq_init);
 module_exit(pas_cpufreq_exit);
 
+MODULE_DESCRIPTION("cpufreq driver for PA Semi PWRficient");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Egor Martovetsky <[email protected]>, Olof Johansson <[email protected]>");

drivers/cpufreq/pmac64-cpufreq.c

@@ -671,4 +671,5 @@ static int __init g5_cpufreq_init(void)
 module_init(g5_cpufreq_init);
 
 
+MODULE_DESCRIPTION("cpufreq driver for SMU & 970FX based G5 Macs");
 MODULE_LICENSE("GPL");

drivers/cpufreq/powernv-cpufreq.c

@@ -1160,5 +1160,6 @@ static void __exit powernv_cpufreq_exit(void)
 }
 module_exit(powernv_cpufreq_exit);
 
+MODULE_DESCRIPTION("cpufreq driver for IBM/OpenPOWER powernv systems");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Vaidyanathan Srinivasan <svaidy at linux.vnet.ibm.com>");

drivers/cpufreq/ppc_cbe_cpufreq.c

@@ -168,5 +168,6 @@ static void __exit cbe_cpufreq_exit(void)
 module_init(cbe_cpufreq_init);
 module_exit(cbe_cpufreq_exit);
 
+MODULE_DESCRIPTION("cpufreq driver for Cell BE processors");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Christian Krafft <[email protected]>");

include/linux/cpufreq.h

@@ -577,12 +577,6 @@ static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
 #define CPUFREQ_POLICY_POWERSAVE	(1)
 #define CPUFREQ_POLICY_PERFORMANCE	(2)
 
-/*
- * The polling frequency depends on the capability of the processor. Default
- * polling frequency is 1000 times the transition latency of the processor.
- */
-#define LATENCY_MULTIPLIER		(1000)
-
 struct cpufreq_governor {
 	char	name[CPUFREQ_NAME_LEN];
 	int	(*init)(struct cpufreq_policy *policy);