diff options
| author | Shawn Guo <shawn.guo@linaro.org> | 2013-01-30 14:27:49 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-02-02 00:01:16 +0100 |
| commit | 5553f9e26f6f49a93ba732fd222eac6973a4cf35 (patch) | |
| tree | 039a24ab646dc51c047f7b6695dcbb73f190a6e0 /drivers/cpufreq/highbank-cpufreq.c | |
| parent | 58ddcead4f163a01cef96aa5ba88f374011d8aea (diff) | |
cpufreq: instantiate cpufreq-cpu0 as a platform_driver
As multiplatform build is being adopted by more and more ARM platforms,
initcall function should be used very carefully. For example, when
GENERIC_CPUFREQ_CPU0 is built in the kernel, cpu0_cpufreq_driver_init()
will be called on all the platforms to initialize cpufreq-cpu0 driver.
To eliminate this undesired the effect, the patch changes cpufreq-cpu0
driver to have it instantiated as a platform_driver. Then it will only
run on platforms that create the platform_device "cpufreq-cpu0".
Along with the change, it also changes cpu_dev to be &pdev->dev,
so that managed functions can start working, and module build gets
supported too.
The highbank-cpufreq driver is also updated accordingly to adapt the
changes on cpufreq-cpu0.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Mark Langsdorf <mark.langsdorf@calxeda.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/highbank-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/highbank-cpufreq.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/cpufreq/highbank-cpufreq.c b/drivers/cpufreq/highbank-cpufreq.c index 53f25e5aa6b7..66e3a71b81a3 100644 --- a/drivers/cpufreq/highbank-cpufreq.c +++ b/drivers/cpufreq/highbank-cpufreq.c @@ -20,6 +20,7 @@ #include <linux/err.h> #include <linux/of.h> #include <linux/mailbox.h> +#include <linux/platform_device.h> #define HB_CPUFREQ_CHANGE_NOTE 0x80000001 #define HB_CPUFREQ_IPC_LEN 7 @@ -65,6 +66,7 @@ static struct notifier_block hb_cpufreq_clk_nb = { static int hb_cpufreq_driver_init(void) { + struct platform_device_info devinfo = { .name = "cpufreq-cpu0", }; struct device *cpu_dev; struct clk *cpu_clk; struct device_node *np; @@ -104,6 +106,9 @@ static int hb_cpufreq_driver_init(void) goto out_put_node; } + /* Instantiate cpufreq-cpu0 */ + platform_device_register_full(&devinfo); + out_put_node: of_node_put(np); return ret; |