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/kirkwood-cpufreq.c | 54 ++++++++++++++------------------------ 1 file changed, 20 insertions(+), 34 deletions(-) (limited to 'drivers/cpufreq/kirkwood-cpufreq.c') diff --git a/drivers/cpufreq/kirkwood-cpufreq.c b/drivers/cpufreq/kirkwood-cpufreq.c index 0ae4dd7..0767a4e 100644 --- a/drivers/cpufreq/kirkwood-cpufreq.c +++ b/drivers/cpufreq/kirkwood-cpufreq.c @@ -58,48 +58,34 @@ static unsigned int kirkwood_cpufreq_get_cpu_frequency(unsigned int cpu) static int kirkwood_cpufreq_target(struct cpufreq_policy *policy, unsigned int index) { - struct cpufreq_freqs freqs; unsigned int state = kirkwood_freq_table[index].driver_data; unsigned long reg; - freqs.old = kirkwood_cpufreq_get_cpu_frequency(0); - freqs.new = kirkwood_freq_table[index].frequency; + local_irq_disable(); - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); + /* Disable interrupts to the CPU */ + reg = readl_relaxed(priv.base); + reg |= CPU_SW_INT_BLK; + writel_relaxed(reg, priv.base); - dev_dbg(priv.dev, "Attempting to set frequency to %i KHz\n", - kirkwood_freq_table[index].frequency); - dev_dbg(priv.dev, "old frequency was %i KHz\n", - kirkwood_cpufreq_get_cpu_frequency(0)); - - if (freqs.old != freqs.new) { - local_irq_disable(); - - /* Disable interrupts to the CPU */ - reg = readl_relaxed(priv.base); - reg |= CPU_SW_INT_BLK; - writel_relaxed(reg, priv.base); - - switch (state) { - case STATE_CPU_FREQ: - clk_disable(priv.powersave_clk); - break; - case STATE_DDR_FREQ: - clk_enable(priv.powersave_clk); - break; - } + switch (state) { + case STATE_CPU_FREQ: + clk_disable(priv.powersave_clk); + break; + case STATE_DDR_FREQ: + clk_enable(priv.powersave_clk); + break; + } - /* Wait-for-Interrupt, while the hardware changes frequency */ - cpu_do_idle(); + /* Wait-for-Interrupt, while the hardware changes frequency */ + cpu_do_idle(); - /* Enable interrupts to the CPU */ - reg = readl_relaxed(priv.base); - reg &= ~CPU_SW_INT_BLK; - writel_relaxed(reg, priv.base); + /* Enable interrupts to the CPU */ + reg = readl_relaxed(priv.base); + reg &= ~CPU_SW_INT_BLK; + writel_relaxed(reg, priv.base); - local_irq_enable(); - } - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); + local_irq_enable(); return 0; } -- cgit v1.1