linux-kernel - Re: [PATCH V3] arm64: dts: ti: k3-am68-sk-som: Add support for OSPI flash

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Message-ID: <e7320b4c-d6c3-4164-a39b-d77c9ebcc7b7@ti.com>
Date: Fri, 8 Mar 2024 13:40:50 +0530
From: "Kumar, Udit" <u-kumar1@...com>
To: Sinthu Raja <sinthu.raja@...tralsolutions.com>,
        Nishanth Menon
	<nm@...com>, Tero Kristo <kristo@...nel.org>,
        Vignesh Raghavendra
	<vigneshr@...com>
CC: <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Sinthu Raja <sinthu.raja@...com>
Subject: Re: [PATCH V3] arm64: dts: ti: k3-am68-sk-som: Add support for OSPI
 flash

Hi Sinthu,

On 2/26/2024 3:22 PM, Sinthu Raja wrote:
> From: Sinthu Raja <sinthu.raja@...com>
>
> AM68 SK has an OSPI NOR flash on its SOM connected to OSPI0 instance.
> Enable support for the same. Also, describe the OSPI flash partition
> information through the device tree, according to the offsets in the
> bootloader.
>
> Signed-off-by: Sinthu Raja <sinthu.raja@...com>
> ---
>
> Changes in V3:
> Address review comments:
>     a. Fix the make dtbs_check error related to ospi pinctrl
>     b. Increase the partition 0 size to 1MB and update the following
> partitions start address accordingly.
>
> V2: https://lore.kernel.org/linux-arm-kernel/20240219075932.6458-1-sinthu.raja@ti.com/
>
>   arch/arm64/boot/dts/ti/k3-am68-sk-som.dtsi | 78 ++++++++++++++++++++++
>   1 file changed, 78 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-am68-sk-som.dtsi b/arch/arm64/boot/dts/ti/k3-am68-sk-som.dtsi
> index 0f4a5da0ebc4..d3e869c250a2 100644
> --- a/arch/arm64/boot/dts/ti/k3-am68-sk-som.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am68-sk-som.dtsi
> @@ -130,6 +130,24 @@ rtos_ipc_memory_region: ipc-memories@...00000 {
>   	};
>   };
>   
> +&wkup_pmx0 {
> +	mcu_fss0_ospi0_pins_default: mcu-fss0-ospi0-pins {
> +		pinctrl-single,pins = <
> +			J721S2_WKUP_IOPAD(0x000, PIN_OUTPUT, 0) /* (D19) MCU_OSPI0_CLK */
> +			J721S2_WKUP_IOPAD(0x02c, PIN_OUTPUT, 0) /* (F15) MCU_OSPI0_CSn0 */
> +			J721S2_WKUP_IOPAD(0x00c, PIN_INPUT, 0) /* (C19) MCU_OSPI0_D0 */
> +			J721S2_WKUP_IOPAD(0x010, PIN_INPUT, 0) /* (F16) MCU_OSPI0_D1 */
> +			J721S2_WKUP_IOPAD(0x014, PIN_INPUT, 0) /* (G15) MCU_OSPI0_D2 */
> +			J721S2_WKUP_IOPAD(0x018, PIN_INPUT, 0) /* (F18) MCU_OSPI0_D3 */
> +			J721S2_WKUP_IOPAD(0x01c, PIN_INPUT, 0) /* (E19) MCU_OSPI0_D4 */
> +			J721S2_WKUP_IOPAD(0x020, PIN_INPUT, 0) /* (G19) MCU_OSPI0_D5 */
> +			J721S2_WKUP_IOPAD(0x024, PIN_INPUT, 0) /* (F19) MCU_OSPI0_D6 */
> +			J721S2_WKUP_IOPAD(0x028, PIN_INPUT, 0) /* (F20) MCU_OSPI0_D7 */
> +			J721S2_WKUP_IOPAD(0x008, PIN_INPUT, 0) /* (E18) MCU_OSPI0_DQS */


I see there is one pin SOC_MCU_OSPI0_INT# connected over F17 GPIO.

Please suggest, if this is being used ?

> +		>;
> +	};
> +};
> +
>   &wkup_pmx2 {
>   	wkup_i2c0_pins_default: wkup-i2c0-default-pins {
>   		pinctrl-single,pins = <
> @@ -152,6 +170,66 @@ eeprom@51 {
>   	};
>   };
>   
> +&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 {
> +			compatible = "fixed-partitions";
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +
> +			partition@0 {
> +				label = "ospi.tiboot3";
> +				reg = <0x0 0x100000>;
> +			};
> +
> +			partition@...000 {
> +				label = "ospi.tispl";
> +				reg = <0x100000 0x200000>;
> +			};
> +
> +			partition@...000 {
> +				label = "ospi.u-boot";
> +				reg = <0x300000 0x400000>;
> +			};
> +
> +			partition@...000 {
> +				label = "ospi.env";
> +				reg = <0x700000 0x40000>;
> +			};
> +
> +			partition@...000 {
> +				label = "ospi.env.backup";
> +				reg = <0x740000 0x40000>;
> +			};
> +
> +			partition@...000 {
> +				label = "ospi.rootfs";
> +				reg = <0x800000 0x37c0000>;
> +			};
> +
> +			partition@...0000 {
> +				label = "ospi.phypattern";
> +				reg = <0x3fc0000 0x40000>;
> +			};
> +		};
> +	};
> +};
> +
>   &mailbox0_cluster0 {
>   	status = "okay";
>   	interrupts = <436>;