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

[Grant Likely]

On Fri, 25 Apr 2014 21:20:08 +0800, Hanjun Guo <hanjun.guo at 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 at linaro.org>
> Signed-off-by: Graeme Gregory <graeme.gregory at linaro.org>
> Signed-off-by: Hanjun Guo <hanjun.guo at 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 at 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 at linaro.org>

Acked-by: Grant Likely <grant.likely at 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
>