linux-kernel - Re: [PATCH v12 3/8] arm64: dts: ti: k3-j721s2-mcu-wakeup: Add support of OSPI

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Message-ID: <61fab807-42df-cc2c-51de-f54e9ea477c8@ti.com>
Date:   Wed, 1 Mar 2023 09:57:55 -0600
From:   Andrew Davis <afd@...com>
To:     Ravi Gunasekaran <r-gunasekaran@...com>, <nm@...com>,
        <vigneshr@...com>, <kristo@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <s-vadapalli@...com>,
        <vaishnav.a@...com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v12 3/8] arm64: dts: ti: k3-j721s2-mcu-wakeup: Add support
 of OSPI

On 3/1/23 3:11 AM, Ravi Gunasekaran wrote:
> From: Aswath Govindraju <a-govindraju@...com>
> 
> Add support for two instance of OSPI in J721S2 SoC.
> 
> Reviewed-by: Vaishnav Achath <vaishnav.a@...com>
> Signed-off-by: Aswath Govindraju <a-govindraju@...com>
> Signed-off-by: Matt Ranostay <mranostay@...com>
> Signed-off-by: Ravi Gunasekaran <r-gunasekaran@...com>
> ---
> Changes from v11:
> * Cleaned up comments
> 
> Changes from v10:
> * Documented the reason for disabling the nodes by default.
> * Removed Link tag from commmit message
> 
> Changes from v9:
> * Disabled fss, ospi nodes by default in common DT file
> 
> Changes from v8:
> * Updated "ranges" property to fix dtbs warnings
> 
> Changes from v7:
> * Removed "reg" property from syscon node
> * Renamed the "syscon" node to "bus" to after change in
>    compatible property
> 
> Changes from v6:
> * Fixed the syscon node's compatible property
> 
> Changes from v5:
> * Updated the syscon node's compatible property
> * Removed Cc tags from commit message
> 
> Changes from v4:
> * No change
> 
> Changes from v3:
> * No change
> 
> Changes from v2:
> * No change
> 
> Changes from v1:
> * No change
> 
>   .../boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi     | 46 +++++++++++++++++++
>   1 file changed, 46 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
> index 0af242aa9816..ab3ce8be7216 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
> @@ -306,4 +306,50 @@
>   			ti,cpts-periodic-outputs = <2>;
>   		};
>   	};
> +
> +	fss: bus@...00000 {
> +		compatible = "simple-bus";
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges = <0x00 0x47000000 0x00 0x47000000 0x00 0x00068400>,
> +			 <0x05 0x00000000 0x05 0x00000000 0x01 0x00000000>,
> +			 <0x07 0x00000000 0x07 0x00000000 0x01 0x00000000>;
> +
> +		status = "disabled";

Since this node doesn't need pinmux, why is it default disabled? Same for
the other parent nodes in this series.

Andrew

> +
> +		ospi0: spi@...40000 {
> +			compatible = "ti,am654-ospi", "cdns,qspi-nor";
> +			reg = <0x00 0x47040000 0x00 0x100>,
> +			      <0x05 0x00000000 0x01 0x00000000>;
> +			interrupts = <GIC_SPI 840 IRQ_TYPE_LEVEL_HIGH>;
> +			cdns,fifo-depth = <256>;
> +			cdns,fifo-width = <4>;
> +			cdns,trigger-address = <0x0>;
> +			clocks = <&k3_clks 109 5>;
> +			assigned-clocks = <&k3_clks 109 5>;
> +			assigned-clock-parents = <&k3_clks 109 7>;
> +			assigned-clock-rates = <166666666>;
> +			power-domains = <&k3_pds 109 TI_SCI_PD_EXCLUSIVE>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			status = "disabled"; /* Needs pinmux */
> +		};
> +
> +		ospi1: spi@...50000 {
> +			compatible = "ti,am654-ospi", "cdns,qspi-nor";
> +			reg = <0x00 0x47050000 0x00 0x100>,
> +			      <0x07 0x00000000 0x01 0x00000000>;
> +			interrupts = <GIC_SPI 841 IRQ_TYPE_LEVEL_HIGH>;
> +			cdns,fifo-depth = <256>;
> +			cdns,fifo-width = <4>;
> +			cdns,trigger-address = <0x0>;
> +			clocks = <&k3_clks 110 5>;
> +			power-domains = <&k3_pds 110 TI_SCI_PD_EXCLUSIVE>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			status = "disabled"; /* Needs pinmux */
> +		};
> +	};
>   };