linux-kernel - Re: [RESEND PATCH V2 2/2] arm64: dts: ti: k3-am69-sk: Add support for OSPI flash

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Date: Mon, 19 Feb 2024 20:22:38 +0530
From: "Kumar, Udit" <u-kumar1@...com>
To: <sabiya.d@...tralsolutions.com>, <nm@...com>, <vigneshr@...com>,
        <kristo@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <linus.walleij@...aro.org>
CC: <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Dasnavis Sabiya <sabiya.d@...com>
Subject: Re: [RESEND PATCH V2 2/2] arm64: dts: ti: k3-am69-sk: Add support for
 OSPI flash


On 2/19/2024 4:44 PM, sabiya.d@...tralsolutions.com wrote:
> From: Dasnavis Sabiya <sabiya.d@...com>
>
> AM69 SK has S28HS512T OSPI flash connected to MCU OSPI0.
> Enable support for the same. Also describe the partition
> information according to the offsets in the bootloader.
>
> Signed-off-by: Dasnavis Sabiya <sabiya.d@...com>
> ---
>   arch/arm64/boot/dts/ti/k3-am69-sk.dts | 81 +++++++++++++++++++++++++++
>   1 file changed, 81 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-am69-sk.dts b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
> index 0ff4d1623cf4..acda25a9e814 100644
> --- a/arch/arm64/boot/dts/ti/k3-am69-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
> @@ -471,6 +471,25 @@ J784S4_IOPAD(0x09C, PIN_OUTPUT, 0) /* (AF35) MCAN7_TX */
>   	};
>   };
>   
> +&wkup_pmx0 {
> +	bootph-all;
> +	mcu_fss0_ospi0_pins_default: mcu-fss0-ospi0-default-pins {
> +		pinctrl-single,pins = <
> +			J784S4_WKUP_IOPAD(0x000, PIN_OUTPUT, 0) /* (E32) MCU_OSPI0_CLK */
> +			J784S4_WKUP_IOPAD(0x02c, PIN_OUTPUT, 0) /* (A32) MCU_OSPI0_CSn0 */
> +			J784S4_WKUP_IOPAD(0x00c, PIN_INPUT, 0) /* (B33) MCU_OSPI0_D0 */
> +			J784S4_WKUP_IOPAD(0x010, PIN_INPUT, 0) /* (B32) MCU_OSPI0_D1 */
> +			J784S4_WKUP_IOPAD(0x014, PIN_INPUT, 0) /* (C33) MCU_OSPI0_D2 */
> +			J784S4_WKUP_IOPAD(0x018, PIN_INPUT, 0) /* (C35) MCU_OSPI0_D3 */
> +			J784S4_WKUP_IOPAD(0x01c, PIN_INPUT, 0) /* (D33) MCU_OSPI0_D4 */
> +			J784S4_WKUP_IOPAD(0x020, PIN_INPUT, 0) /* (D34) MCU_OSPI0_D5 */
> +			J784S4_WKUP_IOPAD(0x024, PIN_INPUT, 0) /* (E34) MCU_OSPI0_D6 */
> +			J784S4_WKUP_IOPAD(0x028, PIN_INPUT, 0) /* (E33) MCU_OSPI0_D7 */
> +			J784S4_WKUP_IOPAD(0x008, PIN_INPUT, 0) /* (C34) MCU_OSPI0_DQS */
> +		>;
> +	};
> +};
> +
>   &wkup_pmx2 {
>   	bootph-all;
>   	pmic_irq_pins_default: pmic-irq-default-pins {
> @@ -1070,3 +1089,65 @@ &main_mcan7 {
>   	pinctrl-0 = <&main_mcan7_pins_default>;
>   	phys = <&transceiver4>;
>   };
> +
> +&ospi0 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mcu_fss0_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>;
> +
> +		partitions {
> +			bootph-all;
> +			compatible = "fixed-partitions";
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +
> +			partition@0 {
> +				label = "ospi.tiboot3";
> +				reg = <0x0 0x80000>;
> +			};


Recent update around u-boot shows, 512K is not sufficient for tiboot3.

Please consider to make it 1MB

> +
> +			partition@...00 {
> +				label = "ospi.tispl";
> +				reg = <0x80000 0x200000>;
> +			};
> +
> +			partition@...000 {
> +				label = "ospi.u-boot";
> +				reg = <0x280000 0x400000>;
> +			};
> +
> +			partition@...000 {
> +				label = "ospi.env";
> +				reg = <0x680000 0x40000>;
> +			};
> +
> +			partition@...000 {
> +				label = "ospi.env.backup";
> +				reg = <0x6c0000 0x40000>;
> +			};
> +
> +			partition@...000 {
> +				label = "ospi.rootfs";
> +				reg = <0x800000 0x37c0000>;
> +			};
> +
> +			partition@...0000 {
> +				bootph-pre-ram;
> +				label = "ospi.phypattern";
> +				reg = <0x3fc0000 0x40000>;
> +			};
> +		};
> +	};
> +};