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authorViresh Kumar <viresh.kumar@linaro.org>2014-01-09 19:08:43 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-01-17 05:00:44 +0400
commit652ed95d5fa6074b3c4ea245deb0691f1acb6656 (patch)
tree7b01079f3a582b0d6b08f541a8a344440bec8eae /drivers/cpufreq/unicore2-cpufreq.c
parent0ad04fb30db0341d0b1134e2f592d9146c9abb64 (diff)
downloadlinux-652ed95d5fa6074b3c4ea245deb0691f1acb6656.tar.xz
cpufreq: introduce cpufreq_generic_get() routine
CPUFreq drivers that use clock frameworks interface,i.e. clk_get_rate(), to get CPUs clk rate, have similar sort of code used in most of them. This patch adds a generic ->get() which will do the same thing for them. All those drivers are required to now is to set .get to cpufreq_generic_get() and set their clk pointer in policy->clk during ->init(). Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no> Acked-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/unicore2-cpufreq.c')
-rw-r--r--drivers/cpufreq/unicore2-cpufreq.c19
1 files changed, 7 insertions, 12 deletions
diff --git a/drivers/cpufreq/unicore2-cpufreq.c b/drivers/cpufreq/unicore2-cpufreq.c
index 86f6cfec2e09..36cc330b8747 100644
--- a/drivers/cpufreq/unicore2-cpufreq.c
+++ b/drivers/cpufreq/unicore2-cpufreq.c
@@ -11,6 +11,7 @@
* published by the Free Software Foundation.
*/
+#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
@@ -33,28 +34,18 @@ static int ucv2_verify_speed(struct cpufreq_policy *policy)
return 0;
}
-static unsigned int ucv2_getspeed(unsigned int cpu)
-{
- struct clk *mclk = clk_get(NULL, "MAIN_CLK");
-
- if (cpu)
- return 0;
- return clk_get_rate(mclk)/1000;
-}
-
static int ucv2_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
struct cpufreq_freqs freqs;
- struct clk *mclk = clk_get(NULL, "MAIN_CLK");
int ret;
freqs.old = policy->cur;
freqs.new = target_freq;
cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
- ret = clk_set_rate(mclk, target_freq * 1000);
+ ret = clk_set_rate(policy->mclk, target_freq * 1000);
cpufreq_notify_post_transition(policy, &freqs, ret);
return ret;
@@ -64,9 +55,13 @@ static int __init ucv2_cpu_init(struct cpufreq_policy *policy)
{
if (policy->cpu != 0)
return -EINVAL;
+
policy->min = policy->cpuinfo.min_freq = 250000;
policy->max = policy->cpuinfo.max_freq = 1000000;
policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
+ policy->clk = clk_get(NULL, "MAIN_CLK");
+ if (IS_ERR(policy->clk))
+ return PTR_ERR(policy->clk);
return 0;
}
@@ -74,7 +69,7 @@ static struct cpufreq_driver ucv2_driver = {
.flags = CPUFREQ_STICKY,
.verify = ucv2_verify_speed,
.target = ucv2_target,
- .get = ucv2_getspeed,
+ .get = cpufreq_generic_get,
.init = ucv2_cpu_init,
.name = "UniCore-II",
};