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/ppc-corenet-cpufreq.c | 19 +------------------ 1 file changed, 1 insertion(+), 18 deletions(-) (limited to 'drivers/cpufreq/ppc-corenet-cpufreq.c') diff --git a/drivers/cpufreq/ppc-corenet-cpufreq.c b/drivers/cpufreq/ppc-corenet-cpufreq.c index 79d8e9c46b6d..3f7be46d2b27 100644 --- a/drivers/cpufreq/ppc-corenet-cpufreq.c +++ b/drivers/cpufreq/ppc-corenet-cpufreq.c @@ -69,8 +69,6 @@ static const struct soc_data sdata[] = { static u32 min_cpufreq; static const u32 *fmask; -/* serialize frequency changes */ -static DEFINE_MUTEX(cpufreq_lock); static DEFINE_PER_CPU(struct cpu_data *, cpu_data); /* cpumask in a cluster */ @@ -253,26 +251,11 @@ static int __exit corenet_cpufreq_cpu_exit(struct cpufreq_policy *policy) static int corenet_cpufreq_target(struct cpufreq_policy *policy, unsigned int index) { - struct cpufreq_freqs freqs; struct clk *parent; - int ret; struct cpu_data *data = per_cpu(cpu_data, policy->cpu); - freqs.old = policy->cur; - freqs.new = data->table[index].frequency; - - mutex_lock(&cpufreq_lock); - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); - parent = of_clk_get(data->parent, data->table[index].driver_data); - ret = clk_set_parent(data->clk, parent); - if (ret) - freqs.new = freqs.old; - - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); - mutex_unlock(&cpufreq_lock); - - return ret; + return clk_set_parent(data->clk, parent); } static struct cpufreq_driver ppc_corenet_cpufreq_driver = { -- cgit