From d4019f0a92ab802f385cc9c8ad3ab7b5449712cb Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Wed, 14 Aug 2013 19:38:24 +0530 Subject: cpufreq: move freq change notifications to cpufreq core Most of the drivers do following in their ->target_index() routines: struct cpufreq_freqs freqs; freqs.old = old freq... freqs.new = new freq... cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); /* Change rate here */ cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); This is replicated over all cpufreq drivers today and there doesn't exists a good enough reason why this shouldn't be moved to cpufreq core instead. There are few special cases though, like exynos5440, which doesn't do everything on the call to ->target_index() routine and call some kind of bottom halves for doing this work, work/tasklet/etc.. They may continue doing notification from their own code as flag: CPUFREQ_ASYNC_NOTIFICATION is already set for them. All drivers are also modified in this patch to avoid breaking 'git bisect', as double notification would happen otherwise. Acked-by: Hans-Christian Egtvedt Acked-by: Jesper Nilsson Acked-by: Linus Walleij Acked-by: Russell King Acked-by: Stephen Warren Tested-by: Andrew Lunn Tested-by: Nicolas Pitre Reviewed-by: Lan Tianyu Signed-off-by: Viresh Kumar Signed-off-by: Rafael J. Wysocki --- drivers/cpufreq/e_powersaver.c | 23 +++-------------------- 1 file changed, 3 insertions(+), 20 deletions(-) (limited to 'drivers/cpufreq/e_powersaver.c') diff --git a/drivers/cpufreq/e_powersaver.c b/drivers/cpufreq/e_powersaver.c index b39c4ef60a7a..9012b8bb6b64 100644 --- a/drivers/cpufreq/e_powersaver.c +++ b/drivers/cpufreq/e_powersaver.c @@ -107,15 +107,9 @@ static int eps_set_state(struct eps_cpu_data *centaur, struct cpufreq_policy *policy, u32 dest_state) { - struct cpufreq_freqs freqs; u32 lo, hi; - int err = 0; int i; - freqs.old = eps_get(policy->cpu); - freqs.new = centaur->fsb * ((dest_state >> 8) & 0xff); - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); - /* Wait while CPU is busy */ rdmsr(MSR_IA32_PERF_STATUS, lo, hi); i = 0; @@ -124,8 +118,7 @@ static int eps_set_state(struct eps_cpu_data *centaur, rdmsr(MSR_IA32_PERF_STATUS, lo, hi); i++; if (unlikely(i > 64)) { - err = -ENODEV; - goto postchange; + return -ENODEV; } } /* Set new multiplier and voltage */ @@ -137,16 +130,10 @@ static int eps_set_state(struct eps_cpu_data *centaur, rdmsr(MSR_IA32_PERF_STATUS, lo, hi); i++; if (unlikely(i > 64)) { - err = -ENODEV; - goto postchange; + return -ENODEV; } } while (lo & ((1 << 16) | (1 << 17))); - /* Return current frequency */ -postchange: - rdmsr(MSR_IA32_PERF_STATUS, lo, hi); - freqs.new = centaur->fsb * ((lo >> 8) & 0xff); - #ifdef DEBUG { u8 current_multiplier, current_voltage; @@ -161,11 +148,7 @@ postchange: current_multiplier); } #endif - if (err) - freqs.new = freqs.old; - - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); - return err; + return 0; } static int eps_target(struct cpufreq_policy *policy, unsigned int index) -- cgit v1.2.3