diff mbox

[v3,part1,02/11] ARM64 / ACPI: Introduce the skeleton of _PDC related for ARM64

Message ID 1398432017-8506-3-git-send-email-hanjun.guo@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Hanjun Guo April 25, 2014, 1:20 p.m. UTC
The _PDC (Processor Driver Capabilities) object provides OSPM a
mechanism to convey to the platform the capabilities supported
by OSPM for processor power management.

OSPM evaluates _PDC prior to evaluating any other processor
power management objects returning configuration information.

This patch introduces the skeleton of _PDC related file to make
ACPI core can be compiled on ARM64, and should be revisited when
implementing CPU power control.

Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
---
 arch/arm64/include/asm/acpi.h |   37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 arch/arm64/include/asm/acpi.h

Comments

Grant Likely April 29, 2014, 9:39 a.m. UTC | #1
On Fri, 25 Apr 2014 21:20:08 +0800, Hanjun Guo <hanjun.guo@linaro.org> wrote:
> The _PDC (Processor Driver Capabilities) object provides OSPM a
> mechanism to convey to the platform the capabilities supported
> by OSPM for processor power management.
> 
> OSPM evaluates _PDC prior to evaluating any other processor
> power management objects returning configuration information.
> 
> This patch introduces the skeleton of _PDC related file to make
> ACPI core can be compiled on ARM64, and should be revisited when
> implementing CPU power control.
> 
> Signed-off-by: Al Stone <al.stone@linaro.org>
> Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
> ---
>  arch/arm64/include/asm/acpi.h |   37 +++++++++++++++++++++++++++++++++++++
>  1 file changed, 37 insertions(+)
>  create mode 100644 arch/arm64/include/asm/acpi.h
> 
> diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
> new file mode 100644
> index 0000000..e3e990e
> --- /dev/null
> +++ b/arch/arm64/include/asm/acpi.h
> @@ -0,0 +1,37 @@
> +/*
> + *  Copyright (C) 2013~2014, Al Stone <al.stone@linaro.org>

Not really a correct copyright assignement. The copyright is held by
Linaro, but the author is Al. It should instead read:

 * Copyright (C0 2013-2014, Linaro Ltd.
 * Author: Al Stone <al.stone@linaro.org>

Acked-by: Grant Likely <grant.likely@linaro.org>

> + *
> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> + *
> + *  This program is free software; you can redistribute it and/or modify
> + *  it under the terms of the GNU General Public License as published by
> + *  the Free Software Foundation; either version 2 of the License, or
> + *  (at your option) any later version.
> + *
> + *  This program is distributed in the hope that it will be useful,
> + *  but WITHOUT ANY WARRANTY; without even the implied warranty of
> + *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + *  GNU General Public License for more details.
> + *
> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> + */
> +
> +#ifndef _ASM_ACPI_H
> +#define _ASM_ACPI_H
> +
> +static inline bool arch_has_acpi_pdc(void)
> +{
> +	/*
> +	 * Always false for now, should be revisited when
> +	 * implementing CPU power management
> +	 */
> +	return false;
> +}
> +
> +static inline void arch_acpi_set_pdc_bits(u32 *buf)
> +{
> +	/* Should be revisited when implementing CPU power management */
> +	return;
> +}
> +
> +#endif /*_ASM_ACPI_H*/
> -- 
> 1.7.9.5
>
Hanjun Guo May 4, 2014, 8:58 a.m. UTC | #2
On 2014-4-29 17:39, Grant Likely wrote:
> On Fri, 25 Apr 2014 21:20:08 +0800, Hanjun Guo <hanjun.guo@linaro.org> wrote:
>> The _PDC (Processor Driver Capabilities) object provides OSPM a
>> mechanism to convey to the platform the capabilities supported
>> by OSPM for processor power management.
>>
>> OSPM evaluates _PDC prior to evaluating any other processor
>> power management objects returning configuration information.
>>
>> This patch introduces the skeleton of _PDC related file to make
>> ACPI core can be compiled on ARM64, and should be revisited when
>> implementing CPU power control.
>>
>> Signed-off-by: Al Stone <al.stone@linaro.org>
>> Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
>> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
>> ---
>>  arch/arm64/include/asm/acpi.h |   37 +++++++++++++++++++++++++++++++++++++
>>  1 file changed, 37 insertions(+)
>>  create mode 100644 arch/arm64/include/asm/acpi.h
>>
>> diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
>> new file mode 100644
>> index 0000000..e3e990e
>> --- /dev/null
>> +++ b/arch/arm64/include/asm/acpi.h
>> @@ -0,0 +1,37 @@
>> +/*
>> + *  Copyright (C) 2013~2014, Al Stone <al.stone@linaro.org>
> 
> Not really a correct copyright assignement. The copyright is held by
> Linaro, but the author is Al. It should instead read:
> 
>  * Copyright (C0 2013-2014, Linaro Ltd.
>  * Author: Al Stone <al.stone@linaro.org>
> 
> Acked-by: Grant Likely <grant.likely@linaro.org>

We will update this patch accordingly.

Thanks
Hanjun
diff mbox

Patch

diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
new file mode 100644
index 0000000..e3e990e
--- /dev/null
+++ b/arch/arm64/include/asm/acpi.h
@@ -0,0 +1,37 @@ 
+/*
+ *  Copyright (C) 2013~2014, Al Stone <al.stone@linaro.org>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#ifndef _ASM_ACPI_H
+#define _ASM_ACPI_H
+
+static inline bool arch_has_acpi_pdc(void)
+{
+	/*
+	 * Always false for now, should be revisited when
+	 * implementing CPU power management
+	 */
+	return false;
+}
+
+static inline void arch_acpi_set_pdc_bits(u32 *buf)
+{
+	/* Should be revisited when implementing CPU power management */
+	return;
+}
+
+#endif /*_ASM_ACPI_H*/