Hi, On 03/07/2013 06:14 PM, Viresh Kumar wrote:
big LITTLE is ARM's new Architecture focussing power/performance needs of modern world. More information about big LITTLE can be found here:
http://www.arm.com/products/processors/technologies/biglittleprocessing.php http://lwn.net/Articles/481055/
In order to keep cpufreq support for all big LITTLE platforms simple/generic, this patch tries to add a generic cpufreq driver layer for all big LITTLE platforms.
The driver is divided into two parts:
- Core driver: Generic and shared across all big LITTLE SoC's
- Glue drivers: Per platform drivers providing ops to the core driver
This patch adds in a generic glue driver which would extract information from Device Tree.
Future SoC's can either reuse the DT glue or write their own depending on the need.
Signed-off-by: Sudeep KarkadaNagesha sudeep.karkadanagesha@arm.com Signed-off-by: Viresh Kumar viresh.kumar@linaro.org
[...]
+void bL_cpufreq_unregister(struct cpufreq_arm_bL_ops *ops) +{
- if (arm_bL_ops != ops) {
pr_info("%s: Registered with: %s, can't unregister, exiting\n",
__func__, arm_bL_ops->name);
- }
The code is not doing what the info message says.
- cpufreq_unregister_driver(&bL_cpufreq_driver);
- pr_info("%s: Un-registered platform driver: %s\n", __func__,
arm_bL_ops->name);
- arm_bL_ops = NULL;
+} +EXPORT_SYMBOL_GPL(bL_cpufreq_unregister);
-- Francesco