linux-kernel - Re: [PATCH 2/2] arm64: dts: ti: k3-am64-evm/sk: Add OSPI flash DT node

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Date:   Tue, 9 Mar 2021 18:47:45 +0530
From:   Pratyush Yadav <p.yadav@...com>
To:     Vignesh Raghavendra <vigneshr@...com>
CC:     Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Lokesh Vutla <lokeshvutla@...com>
Subject: Re: [PATCH 2/2] arm64: dts: ti: k3-am64-evm/sk: Add OSPI flash DT
 node

On 09/03/21 06:35PM, Vignesh Raghavendra wrote:
> Both AM64 EVM and SK have a 512Mb S28HS512T Octal SPI NOR flash.
> Add DT node for the same.
> 
> Signed-off-by: Vignesh Raghavendra <vigneshr@...com>

Reviewed-by: Pratyush Yadav <p.yadav@...com>

> ---
> 
> Bootlog:
> 
> SK: https://pastebin.ubuntu.com/p/gvxg7cFrXH/
> EVM: https://pastebin.ubuntu.com/p/jb39GqkB78/
> 
>  arch/arm64/boot/dts/ti/k3-am642-evm.dts | 36 +++++++++++++++++++++++++
>  arch/arm64/boot/dts/ti/k3-am642-sk.dts  | 36 +++++++++++++++++++++++++
>  2 files changed, 72 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
> index 1f1787750fef..7dd8e94b108d 100644
> --- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
> @@ -133,6 +133,22 @@ AM64X_IOPAD(0x0268, PIN_INPUT_PULLUP, 0) /* (C18) I2C1_SCL */
>  			AM64X_IOPAD(0x026c, PIN_INPUT_PULLUP, 0) /* (B19) I2C1_SDA */
>  		>;
>  	};
> +
> +	ospi0_pins_default: ospi0-pins-default {
> +		pinctrl-single,pins = <
> +			AM64X_IOPAD(0x0000, PIN_OUTPUT, 0) /* (N20) OSPI0_CLK */
> +			AM64X_IOPAD(0x002c, PIN_OUTPUT, 0) /* (L19) OSPI0_CSn0 */
> +			AM64X_IOPAD(0x000c, PIN_INPUT, 0) /* (M19) OSPI0_D0 */
> +			AM64X_IOPAD(0x0010, PIN_INPUT, 0) /* (M18) OSPI0_D1 */
> +			AM64X_IOPAD(0x0014, PIN_INPUT, 0) /* (M20) OSPI0_D2 */
> +			AM64X_IOPAD(0x0018, PIN_INPUT, 0) /* (M21) OSPI0_D3 */
> +			AM64X_IOPAD(0x001c, PIN_INPUT, 0) /* (P21) OSPI0_D4 */
> +			AM64X_IOPAD(0x0020, PIN_INPUT, 0) /* (P20) OSPI0_D5 */
> +			AM64X_IOPAD(0x0024, PIN_INPUT, 0) /* (N18) OSPI0_D6 */
> +			AM64X_IOPAD(0x0028, PIN_INPUT, 0) /* (M17) OSPI0_D7 */
> +			AM64X_IOPAD(0x0008, PIN_INPUT, 0) /* (N19) OSPI0_DQS */
> +		>;
> +	};
>  };
>  
>  &main_uart0 {
> @@ -244,3 +260,23 @@ &sdhci1 {
>  	ti,driver-strength-ohm = <50>;
>  	disable-wp;
>  };
> +
> +&ospi0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&ospi0_pins_default>;
> +
> +	flash@0{
> +		compatible = "jedec,spi-nor";
> +		reg = <0x0>;
> +		spi-tx-bus-width = <8>;
> +		spi-rx-bus-width = <8>;
> +		spi-max-frequency = <25000000>;
> +		cdns,tshsl-ns = <60>;
> +		cdns,tsd2d-ns = <60>;
> +		cdns,tchsh-ns = <60>;
> +		cdns,tslch-ns = <60>;
> +		cdns,read-delay = <4>;
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/ti/k3-am642-sk.dts b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
> index aa6ca4c49153..fc27470fc083 100644
> --- a/arch/arm64/boot/dts/ti/k3-am642-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
> @@ -90,6 +90,22 @@ AM64X_IOPAD(0x0268, PIN_INPUT_PULLUP, 0) /* (C18) I2C1_SCL */
>  			AM64X_IOPAD(0x026c, PIN_INPUT_PULLUP, 0) /* (B19) I2C1_SDA */
>  		>;
>  	};
> +
> +	ospi0_pins_default: ospi0-pins-default {
> +		pinctrl-single,pins = <
> +			AM64X_IOPAD(0x0000, PIN_OUTPUT, 0) /* (N20) OSPI0_CLK */
> +			AM64X_IOPAD(0x002c, PIN_OUTPUT, 0) /* (L19) OSPI0_CSn0 */
> +			AM64X_IOPAD(0x000c, PIN_INPUT, 0) /* (M19) OSPI0_D0 */
> +			AM64X_IOPAD(0x0010, PIN_INPUT, 0) /* (M18) OSPI0_D1 */
> +			AM64X_IOPAD(0x0014, PIN_INPUT, 0) /* (M20) OSPI0_D2 */
> +			AM64X_IOPAD(0x0018, PIN_INPUT, 0) /* (M21) OSPI0_D3 */
> +			AM64X_IOPAD(0x001c, PIN_INPUT, 0) /* (P21) OSPI0_D4 */
> +			AM64X_IOPAD(0x0020, PIN_INPUT, 0) /* (P20) OSPI0_D5 */
> +			AM64X_IOPAD(0x0024, PIN_INPUT, 0) /* (N18) OSPI0_D6 */
> +			AM64X_IOPAD(0x0028, PIN_INPUT, 0) /* (M17) OSPI0_D7 */
> +			AM64X_IOPAD(0x0008, PIN_INPUT, 0) /* (N19) OSPI0_DQS */
> +		>;
> +	};
>  };
>  
>  &mcu_uart0 {
> @@ -171,3 +187,23 @@ &sdhci1 {
>  	ti,driver-strength-ohm = <50>;
>  	disable-wp;
>  };
> +
> +&ospi0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&ospi0_pins_default>;
> +
> +	flash@0{
> +		compatible = "jedec,spi-nor";
> +		reg = <0x0>;
> +		spi-tx-bus-width = <8>;
> +		spi-rx-bus-width = <8>;
> +		spi-max-frequency = <25000000>;
> +		cdns,tshsl-ns = <60>;
> +		cdns,tsd2d-ns = <60>;
> +		cdns,tchsh-ns = <60>;
> +		cdns,tslch-ns = <60>;
> +		cdns,read-delay = <4>;
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +	};
> +};
> -- 
> 2.30.1
> 

-- 
Regards,
Pratyush Yadav
Texas Instruments Inc.