linux-kernel - Re: [PATCH V2] arm64: dts: ti: k3-am68-sk-som: Add support for OSPI flash

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Message-ID: <623c9ed1-85f2-47a3-9ca2-8c7fa5b2251b@ti.com>
Date: Mon, 19 Feb 2024 13:40:03 +0530
From: Vignesh Raghavendra <vigneshr@...com>
To: Sinthu Raja <sinthu.raja@...tralsolutions.com>,
        Nishanth Menon
	<nm@...com>, Tero Kristo <kristo@...nel.org>
CC: <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Sinthu Raja <sinthu.raja@...com>
Subject: Re: [PATCH V2] arm64: dts: ti: k3-am68-sk-som: Add support for OSPI
 flash



On 19/02/24 13:29, 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 V2:
> =============
> 1. Address review comments
>    a. remove pin E20, which is not connected.
> 
> V1: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20240206092334.30307-1-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..afaf702cfc9d 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-default {

pinmux nodes should end with -pins                        ^^^^^^


Please run make dtbs_check and fix the issues pointed out

> +		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 */
> +		>;
> +	};
> +};
> +
>  &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 0x80000>;

Should this be 1MB similar to comment at [0]

[0] lore.kernel.org/r/0ca01a1b-8956-40dd-8286-77276e021633@...com

> +			};
> +
> +			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 {
> +				label = "ospi.phypattern";
> +				reg = <0x3fc0000 0x40000>;
> +			};
> +		};
> +	};
> +};
> +
>  &mailbox0_cluster0 {
>  	status = "okay";
>  	interrupts = <436>;

-- 
Regards
Vignesh