linux-kernel - Re: [PATCH] arm64: dts: ti: k3-am62d2-evm: Add support for OSPI flash

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Message-ID: <f207b2e9-a910-40f3-a01e-1af33c7f4e6f@ti.com>
Date: Sat, 23 Aug 2025 09:03:28 +0530
From: Paresh Bhagat <p-bhagat@...com>
To: Nishanth Menon <nm@...com>
CC: <vigneshr@...com>, <praneeth@...com>, <kristo@...nel.org>,
        <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <khasim@...com>, <v-singh1@...com>,
        <afd@...com>, <bb@...com>, <s-k6@...com>
Subject: Re: [PATCH] arm64: dts: ti: k3-am62d2-evm: Add support for OSPI flash

Hi Nishanth,


On 23/08/25 00:00, Nishanth Menon wrote:
> On 14:33-20250813, Paresh Bhagat wrote:
>> AM62D2 EVM has S28HS512T 64 MiB Octal SPI NOR flash connected to the
>> OSPI interface. Add support for the flash and describe the partition
>> information as per bootloader.
>>
>> Signed-off-by: Paresh Bhagat <p-bhagat@...com>
>> ---
>> Boot logs
>> https://gist.github.com/paresh-bhagat12/262d8c64e692d22c4e48363d246fb083
> We already have issues with am62d that needs fixing:
> cpu cpu0: _of_add_opp_table_v2: no supported OPPs
> cpu cpu0: OPP table can't be empty
>
> and
>
> Please enable defconfig for this device
> arch/arm64/boot/dts/ti/k3-am62d2-evm.dts:       typec_pd0: usb-power-controller@3f {
>
> We can look at adding features for am62d after the above are done.


The above fixes are now posted in upstream.

Thanks
>> Tech Ref Manual-https://www.ti.com/lit/pdf/sprujd4
>> Schematics Link-https://www.ti.com/lit/zip/sprcal5
>>
>>   arch/arm64/boot/dts/ti/k3-am62d2-evm.dts | 86 ++++++++++++++++++++++++
>>   1 file changed, 86 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts b/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts
>> index daea18b0bc61..aa943ef52fb5 100644
>> --- a/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts
>> +++ b/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts
>> @@ -25,6 +25,7 @@ aliases {
>>   		rtc0 = &wkup_rtc0;
>>   		ethernet0 = &cpsw_port1;
>>   		ethernet1 = &cpsw_port2;
>> +		spi0 = &ospi0;
>>   	};
>>   
>>   	chosen {
>> @@ -367,6 +368,26 @@ usr_led_pins_default: usr-led-default-pins {
>>   			AM62DX_IOPAD(0x0244, PIN_INPUT, 7) /* (D18) MMC1_SDWP.GPIO1_49 */
>>   		>;
>>   	};
>> +
>> +	ospi0_pins_default: ospi0-default-pins {
>> +		pinctrl-single,pins = <
>> +			AM62DX_IOPAD(0x0000, PIN_OUTPUT, 0) /* (L22) OSPI0_CLK */
>> +			AM62DX_IOPAD(0x002c, PIN_OUTPUT, 0) /* (H21) OSPI0_CSn0 */
>> +			AM62DX_IOPAD(0x0030, PIN_OUTPUT, 0) /* (G19) OSPI0_CSn1 */
>> +			AM62DX_IOPAD(0x0034, PIN_OUTPUT, 0) /* (K20) OSPI0_CSn2 */
>> +			AM62DX_IOPAD(0x0038, PIN_OUTPUT, 0) /* (G20) OSPI0_CSn3 */
>> +			AM62DX_IOPAD(0x000c, PIN_INPUT, 0) /* (J21) OSPI0_D0 */
>> +			AM62DX_IOPAD(0x0010, PIN_INPUT, 0) /* (J18) OSPI0_D1 */
>> +			AM62DX_IOPAD(0x0014, PIN_INPUT, 0) /* (J19) OSPI0_D2 */
>> +			AM62DX_IOPAD(0x0018, PIN_INPUT, 0) /* (H18) OSPI0_D3 */
>> +			AM62DX_IOPAD(0x001c, PIN_INPUT, 0) /* (K21) OSPI0_D4 */
>> +			AM62DX_IOPAD(0x0020, PIN_INPUT, 0) /* (H19) OSPI0_D5 */
>> +			AM62DX_IOPAD(0x0024, PIN_INPUT, 0) /* (J20) OSPI0_D6 */
>> +			AM62DX_IOPAD(0x0028, PIN_INPUT, 0) /* (J22) OSPI0_D7 */
>> +			AM62DX_IOPAD(0x0008, PIN_INPUT, 0) /* (L21) OSPI0_DQS */
>> +		>;
>> +		bootph-all;
>> +	};
>>   };
>>   
>>   &mcu_gpio0 {
>> @@ -613,3 +634,68 @@ &c7x_0 {
>>   &main_rti4 {
>>   	status = "reserved";
>>   };
>> +
>> +&fss {
>> +	status = "okay";
>> +};
>> +
>> +&ospi0 {
>> +	pinctrl-names = "default";
>> +	pinctrl-0 = <&ospi0_pins_default>;
>> +	status = "okay";
>> +
>> +	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>;
>> +			};
>> +
>> +			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>;
>> +				bootph-all;
>> +			};
>> +		};
>> +	};
>> +};
>> -- 
>> 2.34.1
>>
>>