linux-kernel - Re: [PATCH v11 6/8] arm64: dts: ti: k3-j721s2: Add support for OSPI Flashes

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Message-ID: <e20f5d80-e53a-559d-9a21-fcf77c1cf968@linaro.org>
Date:   Fri, 24 Feb 2023 12:11:14 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Ravi Gunasekaran <r-gunasekaran@...com>, nm@...com, afd@...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 v11 6/8] arm64: dts: ti: k3-j721s2: Add support for OSPI
 Flashes

On 24/02/2023 11:24, Ravi Gunasekaran wrote:
> From: Aswath Govindraju <a-govindraju@...com>
> 
> J721S2 has an OSPI NOR flash on its SOM connected the OSPI0 instance and a
> QSPI NOR flash on the common processor board connected to the OSPI1
> instance. Add support for the same
> 
> 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 v10:
> * Removed Link tag from commit message
> 
> Changes from v9:
> * Enabled fss and ospi nodes
> 
> Changes from v8:
> * No change
> 
> Changes from v7:
> * No change
> 
> Changes from v6:
> * No change
> 
> Changes from v5:
> * 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
> 
>  .../dts/ti/k3-j721s2-common-proc-board.dts    | 39 +++++++++++++++++
>  arch/arm64/boot/dts/ti/k3-j721s2-som-p0.dtsi  | 43 +++++++++++++++++++
>  2 files changed, 82 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
> index fa38940fe6cd..76b420379645 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
> @@ -206,6 +206,20 @@
>  			J721S2_WKUP_IOPAD(0x0c8, PIN_INPUT, 7) /* (C28) WKUP_GPIO0_2 */
>  		>;
>  	};
> +
> +	mcu_fss0_ospi1_pins_default: mcu-fss0-ospi1-pins-default {
> +		pinctrl-single,pins = <
> +			J721S2_WKUP_IOPAD(0x040, PIN_OUTPUT, 0) /* (A19) MCU_OSPI1_CLK */
> +			J721S2_WKUP_IOPAD(0x05c, PIN_OUTPUT, 0) /* (D20) MCU_OSPI1_CSn0 */
> +			J721S2_WKUP_IOPAD(0x060, PIN_OUTPUT, 0) /* (C21) MCU_OSPI1_CSn1 */
> +			J721S2_WKUP_IOPAD(0x04c, PIN_INPUT, 0) /* (D21) MCU_OSPI1_D0 */
> +			J721S2_WKUP_IOPAD(0x050, PIN_INPUT, 0) /* (G20) MCU_OSPI1_D1 */
> +			J721S2_WKUP_IOPAD(0x054, PIN_INPUT, 0) /* (C20) MCU_OSPI1_D2 */
> +			J721S2_WKUP_IOPAD(0x058, PIN_INPUT, 0) /* (A20) MCU_OSPI1_D3 */
> +			J721S2_WKUP_IOPAD(0x048, PIN_INPUT, 0) /* (B19) MCU_OSPI1_DQS */
> +			J721S2_WKUP_IOPAD(0x044, PIN_INPUT, 0) /* (B20) MCU_OSPI1_LBCLKO */
> +		>;
> +	};
>  };
>  
>  &main_gpio2 {
> @@ -347,6 +361,31 @@
>  	maximum-speed = "high-speed";
>  };
>  
> +&fss {
> +	status = "okay";

Where is the pinmux usage you said is required for the bus?

> +};
> +
> +&ospi1 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mcu_fss0_ospi1_pins_default>;
> +
> +	flash@0{
> +		compatible = "jedec,spi-nor";
> +		reg = <0x0>;
> +		spi-tx-bus-width = <1>;
> +		spi-rx-bus-width = <4>;
> +		spi-max-frequency = <40000000>;
> +		cdns,tshsl-ns = <60>;
> +		cdns,tsd2d-ns = <60>;
> +		cdns,tchsh-ns = <60>;
> +		cdns,tslch-ns = <60>;
> +		cdns,read-delay = <2>;
> +		#address-cells = <1>;
> +		#size-cells = <1>;

Are you sure these are correct? Aren't they marked as deprecated?



Best regards,
Krzysztof