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ARM: shmobile: add cpufreq-cpu0 driver for common SH-Mobile 

I add a new file(cpufreq.c) for the following reasons.
- Registration of platform_device must be unified in SH-Mobile.
- We can't create a node of cpufreq drivers into device tree.
  (Because cpufreq driver is virtual device.)

Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Gaku Inami 2014-06-03 21:02:45 +09:00 committed by Simon Horman
parent 7171511eae
commit 06e32c91db
3 changed files with 39 additions and 0 deletions
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1
arch/arm/mach-shmobile/Makefile
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@ -48,6 +48,7 @@ obj-$(CONFIG_ARCH_SH7372) += entry-intc.o
# PM objects
obj-$(CONFIG_SUSPEND) += suspend.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
obj-$(CONFIG_CPU_FREQ) += cpufreq.o
obj-$(CONFIG_ARCH_SH7372) += pm-sh7372.o sleep-sh7372.o pm-rmobile.o
obj-$(CONFIG_ARCH_SH73A0) += pm-sh73a0.o
obj-$(CONFIG_ARCH_R8A7740) += pm-r8a7740.o pm-rmobile.o

31
arch/arm/mach-shmobile/cpufreq.c Normal file
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@ -0,0 +1,31 @@
/*
* CPUFreq support code for SH-Mobile ARM
*
* Copyright (C) 2014 Gaku Inami
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
int __init shmobile_cpufreq_init(void)
{
struct device_node *np;
np = of_cpu_device_node_get(0);
if (np == NULL) {
pr_err("failed to find cpu0 node\n");
return 0;
}
if (of_get_property(np, "operating-points", NULL))
platform_device_register_simple("cpufreq-cpu0", -1, NULL, 0);
of_node_put(np);
return 0;
}

7
arch/arm/mach-shmobile/include/mach/common.h
View File

@ -45,12 +45,19 @@ int shmobile_cpuidle_init(void);
static inline int shmobile_cpuidle_init(void) { return 0; }
#endif
#ifdef CONFIG_CPU_FREQ
int shmobile_cpufreq_init(void);
#else
static inline int shmobile_cpufreq_init(void) { return 0; }
#endif
extern void __iomem *shmobile_scu_base;
static inline void __init shmobile_init_late(void)
{
shmobile_suspend_init();
shmobile_cpuidle_init();
shmobile_cpufreq_init();
}
#endif /* __ARCH_MACH_COMMON_H */