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authorViresh Kumar <viresh.kumar@linaro.org>2013-10-25 19:45:48 +0530
committerRafael J. Wysocki <rjw@rjwysocki.net>2013-10-25 22:42:24 +0200
commit9c0ebcf78fde0ffa348a95a544c6d3f2dac5af65 (patch)
tree0aa1814b3cdbd6900a6494d8f0c56551d90cf693 /drivers/cpufreq/ia64-acpi-cpufreq.c
parent6ddee424fea2d269c2f402278d93165c7b92dc58 (diff)
downloadleg-kernel-9c0ebcf78fde0ffa348a95a544c6d3f2dac5af65.tar.gz
cpufreq: Implement light weight ->target_index() routine
Currently, the prototype of cpufreq_drivers target routines is: int target(struct cpufreq_policy *policy, unsigned int target_freq, unsigned int relation); And most of the drivers call cpufreq_frequency_table_target() to get a valid index of their frequency table which is closest to the target_freq. And they don't use target_freq and relation after that. So, it makes sense to just do this work in cpufreq core before calling cpufreq_frequency_table_target() and simply pass index instead. But this can be done only with drivers which expose their frequency table with cpufreq core. For others we need to stick with the old prototype of target() until those drivers are converted to expose frequency tables. This patch implements the new light weight prototype for target_index() routine. It looks like this: int target_index(struct cpufreq_policy *policy, unsigned int index); CPUFreq core will call cpufreq_frequency_table_target() before calling this routine and pass index to it. Because CPUFreq core now requires to call routines present in freq_table.c CONFIG_CPU_FREQ_TABLE must be enabled all the time. This also marks target() interface as deprecated. So, that new drivers avoid using it. And Documentation is updated accordingly. It also converts existing .target() to newly defined light weight .target_index() routine for many driver. Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Russell King <linux@arm.linux.org.uk> Acked-by: David S. Miller <davem@davemloft.net> Tested-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rjw@rjwysocki.net>
Diffstat (limited to 'drivers/cpufreq/ia64-acpi-cpufreq.c')
-rw-r--r--drivers/cpufreq/ia64-acpi-cpufreq.c21
1 files changed, 3 insertions, 18 deletions
diff --git a/drivers/cpufreq/ia64-acpi-cpufreq.c b/drivers/cpufreq/ia64-acpi-cpufreq.c
index 90c6598415fd..4695fa22406a 100644
--- a/drivers/cpufreq/ia64-acpi-cpufreq.c
+++ b/drivers/cpufreq/ia64-acpi-cpufreq.c
@@ -227,26 +227,11 @@ acpi_cpufreq_get (
static int
acpi_cpufreq_target (
struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
+ unsigned int index)
{
- struct cpufreq_acpi_io *data = acpi_io_data[policy->cpu];
- unsigned int next_state = 0;
- unsigned int result = 0;
-
- pr_debug("acpi_cpufreq_setpolicy\n");
-
- result = cpufreq_frequency_table_target(policy,
- data->freq_table, target_freq, relation, &next_state);
- if (result)
- return (result);
-
- result = processor_set_freq(data, policy, next_state);
-
- return (result);
+ return processor_set_freq(acpi_io_data[policy->cpu], policy, index);
}
-
static int
acpi_cpufreq_cpu_init (
struct cpufreq_policy *policy)
@@ -379,7 +364,7 @@ acpi_cpufreq_cpu_exit (
static struct cpufreq_driver acpi_cpufreq_driver = {
.verify = cpufreq_generic_frequency_table_verify,
- .target = acpi_cpufreq_target,
+ .target_index = acpi_cpufreq_target,
.get = acpi_cpufreq_get,
.init = acpi_cpufreq_cpu_init,
.exit = acpi_cpufreq_cpu_exit,