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Date:   Thu, 28 Nov 2019 09:53:27 -0800
From:   Bjorn Andersson <bjorn.andersson@linaro.org>
To:     Georgi Djakov <georgi.djakov@linaro.org>
Cc:     linux-pm@vger.kernel.org, evgreen@chromium.org, agross@kernel.org,
        daidavid1@codeaurora.org, masneyb@onstation.org,
        sibis@codeaurora.org, linux-kernel@vger.kernel.org,
        linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH 1/2] interconnect: Add a common standard aggregate
 function
Message-ID: <20191128175327.GD82109@yoga>
References: <20191128134839.27606-1-georgi.djakov@linaro.org>
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On Thu 28 Nov 05:48 PST 2019, Georgi Djakov wrote:

> Currently there is one very standard aggregation method that is used by
> several drivers. Let's add this as a common function, so that drivers
> could just point to it, instead of copy/pasting code.
> 
> Suggested-by: Evan Green <evgreen@chromium.org>
> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

> ---
>  drivers/interconnect/core.c           | 10 ++++++++++
>  include/linux/interconnect-provider.h |  8 ++++++++
>  2 files changed, 18 insertions(+)
> 
> diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
> index 0e4852feb395..2633fd223875 100644
> --- a/drivers/interconnect/core.c
> +++ b/drivers/interconnect/core.c
> @@ -221,6 +221,16 @@ static int apply_constraints(struct icc_path *path)
>  	return ret;
>  }
>  
> +int icc_std_aggregate(struct icc_node *node, u32 tag, u32 avg_bw,
> +		      u32 peak_bw, u32 *agg_avg, u32 *agg_peak)
> +{
> +	*agg_avg += avg_bw;
> +	*agg_peak = max(*agg_peak, peak_bw);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(icc_std_aggregate);
> +
>  /* of_icc_xlate_onecell() - Translate function using a single index.
>   * @spec: OF phandle args to map into an interconnect node.
>   * @data: private data (pointer to struct icc_onecell_data)
> diff --git a/include/linux/interconnect-provider.h b/include/linux/interconnect-provider.h
> index 31440c921216..0c494534b4d3 100644
> --- a/include/linux/interconnect-provider.h
> +++ b/include/linux/interconnect-provider.h
> @@ -92,6 +92,8 @@ struct icc_node {
>  
>  #if IS_ENABLED(CONFIG_INTERCONNECT)
>  
> +int icc_std_aggregate(struct icc_node *node, u32 tag, u32 avg_bw,
> +		      u32 peak_bw, u32 *agg_avg, u32 *agg_peak);
>  struct icc_node *icc_node_create(int id);
>  void icc_node_destroy(int id);
>  int icc_link_create(struct icc_node *node, const int dst_id);
> @@ -104,6 +106,12 @@ int icc_provider_del(struct icc_provider *provider);
>  
>  #else
>  
> +static inline int icc_std_aggregate(struct icc_node *node, u32 tag, u32 avg_bw,
> +				    u32 peak_bw, u32 *agg_avg, u32 *agg_peak)
> +{
> +	return -ENOTSUPP;
> +}
> +
>  static inline struct icc_node *icc_node_create(int id)
>  {
>  	return ERR_PTR(-ENOTSUPP);