diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2014-01-09 20:38:43 +0530 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-01-17 02:00:44 +0100 |
| commit | 652ed95d5fa6074b3c4ea245deb0691f1acb6656 (patch) | |
| tree | 7b01079f3a582b0d6b08f541a8a344440bec8eae /drivers/cpufreq/unicore2-cpufreq.c | |
| parent | 0ad04fb30db0341d0b1134e2f592d9146c9abb64 (diff) | |
| download | linux-652ed95d5fa6074b3c4ea245deb0691f1acb6656.tar.bz2 | |
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.c | 19 |
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", }; |