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Message-ID: <1551922796.20144.7.camel@mtksdaap41>
Subject: Re: [PATCH v2 03/10] dt-binding: gce: add binding for gce subsys
 property
From:   CK Hu <ck.hu@mediatek.com>
To:     Bibby Hsieh <bibby.hsieh@mediatek.com>
CC:     Jassi Brar <jassisinghbrar@gmail.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Daniel Kurtz <djkurtz@chromium.org>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-mediatek@lists.infradead.org>,
        <srv_heupstream@mediatek.com>,
        Sascha Hauer <kernel@pengutronix.de>,
        "Philipp Zabel" <p.zabel@pengutronix.de>,
        Nicolas Boichat <drinkcat@chromium.org>,
        "YT Shen" <yt.shen@mediatek.com>,
        Daoyuan Huang <daoyuan.huang@mediatek.com>,
        Jiaguang Zhang <jiaguang.zhang@mediatek.com>,
        Dennis-YC Hsieh <dennis-yc.hsieh@mediatek.com>,
        Houlong Wei <houlong.wei@mediatek.com>,
        <ginny.chen@mediatek.com>, <kendrick.hsu@mediatek.com>,
        Frederic Chen <Frederic.Chen@mediatek.com>
Date:   Thu, 7 Mar 2019 09:39:56 +0800
In-Reply-To: <1551865835-50974-4-git-send-email-bibby.hsieh@mediatek.com>
References: <1551865835-50974-1-git-send-email-bibby.hsieh@mediatek.com>
         <1551865835-50974-4-git-send-email-bibby.hsieh@mediatek.com>
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Hi, Bibby:

On Wed, 2019-03-06 at 17:50 +0800, Bibby Hsieh wrote:
> cmdq driver provide a function that get the relationship
> of sub system number from device node for client.
> add specification for #subsys-cells, mediatek,gce-subsys.
> 
> Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
> ---
>  Documentation/devicetree/bindings/mailbox/mtk-gce.txt | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/mailbox/mtk-gce.txt b/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
> index 812698f..07b2adf 100644
> --- a/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
> +++ b/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
> @@ -26,6 +26,13 @@ Required properties:
>  	phandle: Label name of a gce node.
>  	event_number: the event number defined in 'dt-bindings/gce/mt8173-gce.h'
>  		      or 'dt-binding/gce/mt8183-gce.h'.
> +#subsys-cells: Should be 2.
> +	<&phandle register_base_address subsys_number>
> +	phandle: Label name of a gce node.
> +	register_base_address: the register base address that client
> +			       want to write or read.

This look like the same as 'reg' property. I would prefer use
already-defined property, for example:

		mmsys: clock-controller@14000000 {
			compatible = "mediatek,mt8173-mmsys", "syscon";
			reg = <0 0x14000000 0 0x1000>;
			mediatek,gce-subsys = <&gce SUBSYS_1400XXXX>;
		};

Regards,
CK

> +	subsys_number: specify the sub-system id which is corresponding
> +		       to the register address.
>  
>  Required properties for a client device:
>  - mboxes: Client use mailbox to communicate with GCE, it should have this
> @@ -50,6 +57,7 @@ Example:
>  		thread-num = CMDQ_THR_MAX_COUNT;
>  		#mbox-cells = <3>;
>  		#event-cells = <1>;
> +		#subsys-cells = <2>;
>  	};
>  
>  Example for a client device:
> @@ -58,7 +66,8 @@ Example for a client device:
>  		compatible = "mediatek,mt8173-mmsys";
>  		mboxes = <&gce 0 CMDQ_THR_PRIO_LOWEST 1>,
>  			 <&gce 1 CMDQ_THR_PRIO_LOWEST 1>;
> -		mediatek,gce-subsys = <SUBSYS_1400XXXX>;
> +		mediatek,gce-subsys = <&gce 0x14000000 SUBSYS_1400XXXX>,
> +				      <&gce 0x14010000 SUBSYS_1401XXXX>;
>  		mediatek,gce-event-names = "rdma0_sof",
>  					   "rsz0_sof";
>  		mediatek,gce-events = <&gce CMDQ_EVENT_MDP_RDMA0_SOF>,