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/davinci-cpufreq.c | 30 ++++++++++-------------------- 1 file changed, 10 insertions(+), 20 deletions(-) (limited to 'drivers/cpufreq/davinci-cpufreq.c') diff --git a/drivers/cpufreq/davinci-cpufreq.c b/drivers/cpufreq/davinci-cpufreq.c index 1f5d8a569c77..5e8a854381b7 100644 --- a/drivers/cpufreq/davinci-cpufreq.c +++ b/drivers/cpufreq/davinci-cpufreq.c @@ -68,46 +68,36 @@ static unsigned int davinci_getspeed(unsigned int cpu) static int davinci_target(struct cpufreq_policy *policy, unsigned int idx) { - int ret = 0; - struct cpufreq_freqs freqs; struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data; struct clk *armclk = cpufreq.armclk; + unsigned int old_freq, new_freq; + int ret = 0; - freqs.old = davinci_getspeed(0); - freqs.new = pdata->freq_table[idx].frequency; - - dev_dbg(cpufreq.dev, "transition: %u --> %u\n", freqs.old, freqs.new); - - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + old_freq = davinci_getspeed(0); + new_freq = pdata->freq_table[idx].frequency; /* if moving to higher frequency, up the voltage beforehand */ - if (pdata->set_voltage && freqs.new > freqs.old) { + if (pdata->set_voltage && new_freq > old_freq) { ret = pdata->set_voltage(idx); if (ret) - goto out; + return ret; } ret = clk_set_rate(armclk, idx); if (ret) - goto out; + return ret; if (cpufreq.asyncclk) { ret = clk_set_rate(cpufreq.asyncclk, cpufreq.asyncrate); if (ret) - goto out; + return ret; } /* if moving to lower freq, lower the voltage after lowering freq */ - if (pdata->set_voltage && freqs.new < freqs.old) + if (pdata->set_voltage && new_freq < old_freq) pdata->set_voltage(idx); -out: - if (ret) - freqs.new = freqs.old; - - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); - - return ret; + return 0; } static int davinci_cpu_init(struct cpufreq_policy *policy) -- cgit v1.2.3