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path: root/drivers/cpufreq/kirkwood-cpufreq.c
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Diffstat (limited to 'drivers/cpufreq/kirkwood-cpufreq.c')
-rw-r--r--drivers/cpufreq/kirkwood-cpufreq.c107
1 files changed, 26 insertions, 81 deletions
diff --git a/drivers/cpufreq/kirkwood-cpufreq.c b/drivers/cpufreq/kirkwood-cpufreq.c
index ba10658a9394..0767a4e29dfe 100644
--- a/drivers/cpufreq/kirkwood-cpufreq.c
+++ b/drivers/cpufreq/kirkwood-cpufreq.c
@@ -55,69 +55,37 @@ static unsigned int kirkwood_cpufreq_get_cpu_frequency(unsigned int cpu)
return kirkwood_freq_table[0].frequency;
}
-static void kirkwood_cpufreq_set_cpu_state(struct cpufreq_policy *policy,
- unsigned int index)
+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;
-
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
- 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;
- }
+ local_irq_disable();
- /* Wait-for-Interrupt, while the hardware changes frequency */
- cpu_do_idle();
+ /* Disable 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();
+ switch (state) {
+ case STATE_CPU_FREQ:
+ clk_disable(priv.powersave_clk);
+ break;
+ case STATE_DDR_FREQ:
+ clk_enable(priv.powersave_clk);
+ break;
}
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-};
-
-static int kirkwood_cpufreq_verify(struct cpufreq_policy *policy)
-{
- return cpufreq_frequency_table_verify(policy, kirkwood_freq_table);
-}
-static int kirkwood_cpufreq_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- unsigned int index = 0;
+ /* Wait-for-Interrupt, while the hardware changes frequency */
+ cpu_do_idle();
- if (cpufreq_frequency_table_target(policy, kirkwood_freq_table,
- target_freq, relation, &index))
- return -EINVAL;
+ /* Enable interrupts to the CPU */
+ reg = readl_relaxed(priv.base);
+ reg &= ~CPU_SW_INT_BLK;
+ writel_relaxed(reg, priv.base);
- kirkwood_cpufreq_set_cpu_state(policy, index);
+ local_irq_enable();
return 0;
}
@@ -125,40 +93,17 @@ static int kirkwood_cpufreq_target(struct cpufreq_policy *policy,
/* Module init and exit code */
static int kirkwood_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
- int result;
-
- /* cpuinfo and default policy values */
- policy->cpuinfo.transition_latency = 5000; /* 5uS */
- policy->cur = kirkwood_cpufreq_get_cpu_frequency(0);
-
- result = cpufreq_frequency_table_cpuinfo(policy, kirkwood_freq_table);
- if (result)
- return result;
-
- cpufreq_frequency_table_get_attr(kirkwood_freq_table, policy->cpu);
-
- return 0;
-}
-
-static int kirkwood_cpufreq_cpu_exit(struct cpufreq_policy *policy)
-{
- cpufreq_frequency_table_put_attr(policy->cpu);
- return 0;
+ return cpufreq_generic_init(policy, kirkwood_freq_table, 5000);
}
-static struct freq_attr *kirkwood_cpufreq_attr[] = {
- &cpufreq_freq_attr_scaling_available_freqs,
- NULL,
-};
-
static struct cpufreq_driver kirkwood_cpufreq_driver = {
.get = kirkwood_cpufreq_get_cpu_frequency,
- .verify = kirkwood_cpufreq_verify,
- .target = kirkwood_cpufreq_target,
+ .verify = cpufreq_generic_frequency_table_verify,
+ .target_index = kirkwood_cpufreq_target,
.init = kirkwood_cpufreq_cpu_init,
- .exit = kirkwood_cpufreq_cpu_exit,
+ .exit = cpufreq_generic_exit,
.name = "kirkwood-cpufreq",
- .attr = kirkwood_cpufreq_attr,
+ .attr = cpufreq_generic_attr,
};
static int kirkwood_cpufreq_probe(struct platform_device *pdev)