* [PATCH v2 4/8] ARM: shmobile: add cpufreq-cpu0 driver for common SH-Mobile
@ 2014-06-03 12:02 Gaku Inami
2014-06-04 23:37 ` Simon Horman
0 siblings, 1 reply; 2+ messages in thread
From: Gaku Inami @ 2014-06-03 12:02 UTC (permalink / raw)
To: linux-sh
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>
---
Changes since version 1:
- changed the method of checking the device tree.
arch/arm/mach-shmobile/Makefile | 1 +
arch/arm/mach-shmobile/cpufreq.c | 31 ++++++++++++++++++++++++++
arch/arm/mach-shmobile/include/mach/common.h | 7 ++++++
3 files changed, 39 insertions(+)
create mode 100644 arch/arm/mach-shmobile/cpufreq.c
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile
index 29034aa..ccb0563 100644
--- a/arch/arm/mach-shmobile/Makefile
+++ b/arch/arm/mach-shmobile/Makefile
@@ -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
diff --git a/arch/arm/mach-shmobile/cpufreq.c b/arch/arm/mach-shmobile/cpufreq.c
new file mode 100644
index 0000000..e2c868f
--- /dev/null
+++ b/arch/arm/mach-shmobile/cpufreq.c
@@ -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;
+}
diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h
index 8f0cd57..ab5a9b2 100644
--- a/arch/arm/mach-shmobile/include/mach/common.h
+++ b/arch/arm/mach-shmobile/include/mach/common.h
@@ -47,12 +47,19 @@ 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 */
--
1.7.9.5
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2 4/8] ARM: shmobile: add cpufreq-cpu0 driver for common SH-Mobile
2014-06-03 12:02 [PATCH v2 4/8] ARM: shmobile: add cpufreq-cpu0 driver for common SH-Mobile Gaku Inami
@ 2014-06-04 23:37 ` Simon Horman
0 siblings, 0 replies; 2+ messages in thread
From: Simon Horman @ 2014-06-04 23:37 UTC (permalink / raw)
To: linux-sh
On Tue, Jun 03, 2014 at 09:02:45PM +0900, Gaku Inami wrote:
> 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>
Thanks, I have queued this up with Magnus's ack.
> ---
>
> Changes since version 1:
> - changed the method of checking the device tree.
>
> arch/arm/mach-shmobile/Makefile | 1 +
> arch/arm/mach-shmobile/cpufreq.c | 31 ++++++++++++++++++++++++++
> arch/arm/mach-shmobile/include/mach/common.h | 7 ++++++
> 3 files changed, 39 insertions(+)
> create mode 100644 arch/arm/mach-shmobile/cpufreq.c
>
> diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile
> index 29034aa..ccb0563 100644
> --- a/arch/arm/mach-shmobile/Makefile
> +++ b/arch/arm/mach-shmobile/Makefile
> @@ -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
> diff --git a/arch/arm/mach-shmobile/cpufreq.c b/arch/arm/mach-shmobile/cpufreq.c
> new file mode 100644
> index 0000000..e2c868f
> --- /dev/null
> +++ b/arch/arm/mach-shmobile/cpufreq.c
> @@ -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;
> +}
> diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h
> index 8f0cd57..ab5a9b2 100644
> --- a/arch/arm/mach-shmobile/include/mach/common.h
> +++ b/arch/arm/mach-shmobile/include/mach/common.h
> @@ -47,12 +47,19 @@ 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 */
> --
> 1.7.9.5
>
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