linux-kernel - Re: [PATCH v2] mailbox: pcc: Add PCC request and free channel declarations

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Date:	Thu, 23 Jun 2016 02:49:34 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Hoan Tran <hotran@....com>,
	Ashwin Chaugule <ashwin.chaugule@...aro.org>,
	pprakash@...eaurora.org
Cc:	Jassi Brar <jassisinghbrar@...il.com>, Len Brown <lenb@...nel.org>,
	Robert Moore <robert.moore@...el.com>,
	Lv Zheng <lv.zheng@...el.com>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, devel@...ica.org, lho@....com,
	Duc Dang <dhdang@....com>
Subject: Re: [PATCH v2] mailbox: pcc: Add PCC request and free channel declarations

On Thursday, June 16, 2016 02:09:38 PM Hoan Tran wrote:
> Exports pcc_mbox_request_channel() and pcc_mbox_free_channel()
> declarations into a pcc.h header file.
> 
> v2
>  * Introduce pcc.h header file for pcc client methods
> 
> v1
>  * Initial
> 
> Signed-off-by: Hoan Tran <hotran@....com>

Ashwin, Prakash, any comments anyone?

> ---
>  include/acpi/cppc_acpi.h |  7 +------
>  include/acpi/pcc.h       | 29 +++++++++++++++++++++++++++++
>  2 files changed, 30 insertions(+), 6 deletions(-)
>  create mode 100644 include/acpi/pcc.h
> 
> diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h
> index 259683a..ab1da43 100644
> --- a/include/acpi/cppc_acpi.h
> +++ b/include/acpi/cppc_acpi.h
> @@ -15,10 +15,9 @@
>  #define _CPPC_ACPI_H
>  
>  #include <linux/acpi.h>
> -#include <linux/mailbox_controller.h>
> -#include <linux/mailbox_client.h>
>  #include <linux/types.h>
>  
> +#include <acpi/pcc.h>
>  #include <acpi/processor.h>
>  
>  /* Only support CPPCv2 for now. */
> @@ -131,8 +130,4 @@ extern int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls);
>  extern int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps);
>  extern int acpi_get_psd_map(struct cpudata **);
>  
> -/* Methods to interact with the PCC mailbox controller. */
> -extern struct mbox_chan *
> -	pcc_mbox_request_channel(struct mbox_client *, unsigned int);
> -
>  #endif /* _CPPC_ACPI_H*/
> diff --git a/include/acpi/pcc.h b/include/acpi/pcc.h
> new file mode 100644
> index 0000000..17a940a
> --- /dev/null
> +++ b/include/acpi/pcc.h
> @@ -0,0 +1,29 @@
> +/*
> + * PCC (Platform Communications Channel) methods
> + *
> + * 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; version 2
> + * of the License.
> + */
> +
> +#ifndef _PCC_H
> +#define _PCC_H
> +
> +#include <linux/mailbox_controller.h>
> +#include <linux/mailbox_client.h>
> +
> +#ifdef CONFIG_PCC
> +extern struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
> +						  int subspace_id);
> +extern void pcc_mbox_free_channel(struct mbox_chan *chan);
> +#else
> +static inline struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
> +							 int subspace_id)
> +{
> +	return NULL;
> +}
> +static inline void pcc_mbox_free_channel(struct mbox_chan *chan) { }
> +#endif
> +
> +#endif /* _PCC_H */
> 

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.