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cpufreq: exynos: Convert exynos-cpufreq to platform driver

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To make the driver multiplatform-friendly, unconditional initialization
in an initcall is replaced with a platform driver probed only if
respective platform device is registered.

Tested at: Exynos4210 (TRATS) and Exynos4412 (TRATS2)

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Sachin Kamat <sachin.kamat@linaro.org>
Tested-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lukasz Majewski 2013-11-28 13:42:42 +01:00 committed by Rafael J. Wysocki
parent d3916691c9
commit d568b6f71d
5 changed files with 19 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm/mach-exynos/common.c
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@ -303,6 +303,11 @@ void __init exynos_cpuidle_init(void)
platform_device_register(&exynos_cpuidle); platform_device_register(&exynos_cpuidle);
} }
void __init exynos_cpufreq_init(void)
{
platform_device_register_simple("exynos-cpufreq", -1, NULL, 0);
}
void __init exynos_init_late(void) void __init exynos_init_late(void)
{ {
if (of_machine_is_compatible("samsung,exynos5440")) if (of_machine_is_compatible("samsung,exynos5440"))

1
arch/arm/mach-exynos/common.h
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@ -22,6 +22,7 @@ void exynos_init_io(void);
void exynos4_restart(enum reboot_mode mode, const char *cmd); void exynos4_restart(enum reboot_mode mode, const char *cmd);
void exynos5_restart(enum reboot_mode mode, const char *cmd); void exynos5_restart(enum reboot_mode mode, const char *cmd);
void exynos_cpuidle_init(void); void exynos_cpuidle_init(void);
void exynos_cpufreq_init(void);
void exynos_init_late(void); void exynos_init_late(void);
void exynos_firmware_init(void); void exynos_firmware_init(void);

1
arch/arm/mach-exynos/mach-exynos4-dt.c
View File

@ -22,6 +22,7 @@
static void __init exynos4_dt_machine_init(void) static void __init exynos4_dt_machine_init(void)
{ {
exynos_cpuidle_init(); exynos_cpuidle_init();
exynos_cpufreq_init();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
} }

1
arch/arm/mach-exynos/mach-exynos5-dt.c
View File

@ -44,6 +44,7 @@ static void __init exynos5_dt_machine_init(void)
} }
exynos_cpuidle_init(); exynos_cpuidle_init();
exynos_cpufreq_init();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
} }

13
drivers/cpufreq/exynos-cpufreq.c
View File

@ -17,6 +17,7 @@
#include <linux/regulator/consumer.h> #include <linux/regulator/consumer.h>
#include <linux/cpufreq.h> #include <linux/cpufreq.h>
#include <linux/suspend.h> #include <linux/suspend.h>
#include <linux/platform_device.h>
#include <plat/cpu.h> #include <plat/cpu.h>
@ -232,7 +233,7 @@ static struct cpufreq_driver exynos_driver = {
#endif #endif
}; };
static int __init exynos_cpufreq_init(void) static int exynos_cpufreq_probe(struct platform_device *pdev)
{ {
int ret = -EINVAL; int ret = -EINVAL;
@ -281,4 +282,12 @@ err_vdd_arm:
kfree(exynos_info); kfree(exynos_info);
return -EINVAL; return -EINVAL;
} }
late_initcall(exynos_cpufreq_init);
static struct platform_driver exynos_cpufreq_platdrv = {
.driver = {
.name = "exynos-cpufreq",
.owner = THIS_MODULE,
},
.probe = exynos_cpufreq_probe,
};
module_platform_driver(exynos_cpufreq_platdrv);