linux-kernel - Re: [PATCH v2 2/3] soc: qcom: geni: move struct geni

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Message-ID: <YMzTjMNNCR9bsvfu@yoga>
Date:   Fri, 18 Jun 2021 12:10:36 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] soc: qcom: geni: move struct geni_wrapper to
 header

On Fri 18 Jun 09:18 CDT 2021, Vinod Koul wrote:

> SPI & I2C geni driver needs to access struct geni_wrapper, so move it to
> header. The drivers needs this header to find the geni device and use it
> in dma mapping.
> 

How does this differ from engine->dev->parent?

> Using this method works for both DT and ACPI systems
> 

I was under the impression that the wrapper and engines are describe
completely independently in ACPI, so we don't have a link between them.

If that's not the case, then I guess that answers the above question
about ->parent.

Regards,
Bjorn

> Signed-off-by: Vinod Koul <vkoul@...nel.org>
> ---
>  drivers/soc/qcom/qcom-geni-se.c | 14 --------------
>  include/linux/qcom-geni-se.h    | 14 ++++++++++++++
>  2 files changed, 14 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c
> index fe666ea0c487..08d645b90ed3 100644
> --- a/drivers/soc/qcom/qcom-geni-se.c
> +++ b/drivers/soc/qcom/qcom-geni-se.c
> @@ -78,20 +78,6 @@
>   */
>  
>  #define MAX_CLK_PERF_LEVEL 32
> -#define NUM_AHB_CLKS 2
> -
> -/**
> - * struct geni_wrapper - Data structure to represent the QUP Wrapper Core
> - * @dev:		Device pointer of the QUP wrapper core
> - * @base:		Base address of this instance of QUP wrapper core
> - * @ahb_clks:		Handle to the primary & secondary AHB clocks
> - * @to_core:		Core ICC path
> - */
> -struct geni_wrapper {
> -	struct device *dev;
> -	void __iomem *base;
> -	struct clk_bulk_data ahb_clks[NUM_AHB_CLKS];
> -};
>  
>  static const char * const icc_path_names[] = {"qup-core", "qup-config",
>  						"qup-memory"};
> diff --git a/include/linux/qcom-geni-se.h b/include/linux/qcom-geni-se.h
> index 5114e2144b17..5fda675c5cfe 100644
> --- a/include/linux/qcom-geni-se.h
> +++ b/include/linux/qcom-geni-se.h
> @@ -38,6 +38,20 @@ struct geni_icc_path {
>  	unsigned int avg_bw;
>  };
>  
> +#define NUM_AHB_CLKS 2
> +
> +/**
> + * @struct geni_wrapper - Data structure to represent the QUP Wrapper Core
> + * @dev:		Device pointer of the QUP wrapper core
> + * @base:		Base address of this instance of QUP wrapper core
> + * @ahb_clks:		Handle to the primary & secondary AHB clocks
> + */
> +struct geni_wrapper {
> +	struct device *dev;
> +	void __iomem *base;
> +	struct clk_bulk_data ahb_clks[NUM_AHB_CLKS];
> +};
> +
>  /**
>   * struct geni_se - GENI Serial Engine
>   * @base:		Base Address of the Serial Engine's register block
> -- 
> 2.31.1
>