linux-kernel - Re: [PATCH v2 3/3] arm64: dts: ti: k3-j7200-som-p0: Add nodes for OSPI0

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Date:   Fri, 5 Mar 2021 21:43:32 +0530
From:   Vignesh Raghavendra <vigneshr@...com>
To:     Pratyush Yadav <p.yadav@...com>, 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>
Subject: Re: [PATCH v2 3/3] arm64: dts: ti: k3-j7200-som-p0: Add nodes for
 OSPI0



On 3/5/21 9:09 PM, Pratyush Yadav wrote:
> TI J7200 has the Cadence OSPI controller for interfacing with OSPI
> flashes. Add its node to allow using SPI flashes.
> 
> Signed-off-by: Pratyush Yadav <p.yadav@...com>
> ---

Reviewed-by: Vignesh Raghavendra <vigneshr@...com>



> 
> Notes:
>     Changes in v2:
>     - Do not force a pulldown on the DQS line because it already has a
>       pulldown resistor.
> 
>  .../boot/dts/ti/k3-j7200-mcu-wakeup.dtsi      | 17 +++++++++
>  arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi   | 36 +++++++++++++++++++
>  2 files changed, 53 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
> index 359e3e8a8cd0..5408ec815d58 100644
> --- a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
> @@ -269,6 +269,23 @@ hbmc: hyperbus@...34000 {
>  			#size-cells = <1>;
>  			mux-controls = <&hbmc_mux 0>;
>  		};
> +
> +		ospi0: spi@...40000 {
> +			compatible = "ti,am654-ospi";
> +			reg = <0x0 0x47040000 0x0 0x100>,
> +			      <0x5 0x00000000 0x1 0x0000000>;
> +			interrupts = <GIC_SPI 840 IRQ_TYPE_LEVEL_HIGH>;
> +			cdns,fifo-depth = <256>;
> +			cdns,fifo-width = <4>;
> +			cdns,trigger-address = <0x0>;
> +			clocks = <&k3_clks 103 0>;
> +			assigned-clocks = <&k3_clks 103 0>;
> +			assigned-clock-parents = <&k3_clks 103 2>;
> +			assigned-clock-rates = <166666666>;
> +			power-domains = <&k3_pds 103 TI_SCI_PD_EXCLUSIVE>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +		};
>  	};
>  
>  	tscadc0: tscadc@...00000 {
> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi
> index a988e2ab2ba1..34724440171a 100644
> --- a/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi
> @@ -100,6 +100,22 @@ J721E_WKUP_IOPAD(0x24, PIN_INPUT, 1) /* (A8) MCU_OSPI0_D6.MCU_HYPERBUS0_DQ6 */
>  			J721E_WKUP_IOPAD(0x28, PIN_INPUT, 1) /* (A7) MCU_OSPI0_D7.MCU_HYPERBUS0_DQ7 */
>  		>;
>  	};
> +
> +	mcu_fss0_ospi0_pins_default: mcu-fss0-ospi0-pins-default {
> +		pinctrl-single,pins = <
> +			J721E_WKUP_IOPAD(0x0000, PIN_OUTPUT, 0) /* MCU_OSPI0_CLK */
> +			J721E_WKUP_IOPAD(0x002c, PIN_OUTPUT, 0) /* MCU_OSPI0_CSn0 */
> +			J721E_WKUP_IOPAD(0x000c, PIN_INPUT, 0)  /* MCU_OSPI0_D0 */
> +			J721E_WKUP_IOPAD(0x0010, PIN_INPUT, 0)  /* MCU_OSPI0_D1 */
> +			J721E_WKUP_IOPAD(0x0014, PIN_INPUT, 0)  /* MCU_OSPI0_D2 */
> +			J721E_WKUP_IOPAD(0x0018, PIN_INPUT, 0)  /* MCU_OSPI0_D3 */
> +			J721E_WKUP_IOPAD(0x001c, PIN_INPUT, 0)  /* MCU_OSPI0_D4 */
> +			J721E_WKUP_IOPAD(0x0020, PIN_INPUT, 0)  /* MCU_OSPI0_D5 */
> +			J721E_WKUP_IOPAD(0x0024, PIN_INPUT, 0)  /* MCU_OSPI0_D6 */
> +			J721E_WKUP_IOPAD(0x0028, PIN_INPUT, 0)  /* MCU_OSPI0_D7 */
> +			J721E_WKUP_IOPAD(0x0008, PIN_INPUT, 0)  /* MCU_OSPI0_DQS */
> +		>;
> +	};
>  };
>  
>  &main_pmx0 {
> @@ -235,3 +251,23 @@ exp_som: gpio@21 {
>  				  "GPIO_LIN_EN", "CAN_STB";
>  	};
>  };
> +
> +&ospi0 {
> +	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>;
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +	};
> +};
>