[PATCH] arm: dts: k3-j721s2*: Enable OSPI1 with 32-bit address mappings for R5 SPL

[Dutta, Anurag]

On 22-01-2026 08:51, Kumar, Udit wrote:
> Thanks Anurag
>
> On 1/21/2026 11:08 AM, Anurag Dutta wrote:
>> The R5 SPL requires 32-bit address mappings for OSPI1(QSPI) access.
>> Override the OSPI1 node with appropriate 32-bit register ranges to
>> enable proper address translation on the 32-bit R5 core, while
>> preserving 64-bit mappings for A72 cores. While at it, remove the
>> disabled status override for ospi1 node to support booting from
>> qspi.
>>
>> Signed-off-by: Anurag Dutta <a-dutta at ti.com>
>> ---
>> Test logs : 
>> https://gist.github.com/anuragdutta731/b65f63f22c69317d714b65a201438cbc
>
> Could you check, for below error in logs
>
> jedec_spi_nor flash at 0: Software reset enable failed: -524
>
> If this needs some parameter tuning in QSPI node or something to look 
> at driver itself.
>
Hi Udit
This warning seems to be expected. In file : drivers/mtd/spi/spi-nor-core.c,
In function spi_nor_soft_reset(), we can see that spi_nor_setup_op() is 
being invoked
with SNOR_PROTO_8_8_8_DTR as default. However, ours being QSPI(1 1 4) it 
fails to enable
software reset for qspi. This can be confirmed from ospi nor logs :
https://gist.github.com/anuragdutta731/cc30688b596ee063178e6c47947146c0

We do not see the jedec_spi_nor flash at 0: Software reset enable failed: 
-524 warning.

Also, the spi_nor_soft_reset() description clearly mentions that :
The soft reset is executed in Octal DTR mode.

Regards
Anurag

>>
>>   arch/arm/dts/k3-j721s2-common-proc-board-u-boot.dtsi | 4 ----
>>   arch/arm/dts/k3-j721s2-r5.dtsi                       | 5 +++++
>>   2 files changed, 5 insertions(+), 4 deletions(-)
>>
>> diff --git a/arch/arm/dts/k3-j721s2-common-proc-board-u-boot.dtsi 
>> b/arch/arm/dts/k3-j721s2-common-proc-board-u-boot.dtsi
>> index 54eb9b4072c..8d51fea72b8 100644
>> --- a/arch/arm/dts/k3-j721s2-common-proc-board-u-boot.dtsi
>> +++ b/arch/arm/dts/k3-j721s2-common-proc-board-u-boot.dtsi
>> @@ -107,10 +107,6 @@
>>       };
>>   };
>>   -&ospi1 {
>> -    status = "disabled";
>> -};
>> -
>>   &usbss0 {
>>       bootph-all;
>>   };
>> diff --git a/arch/arm/dts/k3-j721s2-r5.dtsi 
>> b/arch/arm/dts/k3-j721s2-r5.dtsi
>> index c1c12e217d2..f3f7dbd86c1 100644
>> --- a/arch/arm/dts/k3-j721s2-r5.dtsi
>> +++ b/arch/arm/dts/k3-j721s2-r5.dtsi
>> @@ -90,6 +90,11 @@
>>                 <0x0 0x50000000 0x0 0x8000000>;
>>   };
>>   +&ospi1 {
>> +        reg = <0x0 0x47050000 0x0 0x100>,
>> +              <0x0 0x58000000 0x0 0x8000000>;
>> +};
>> +
>>   &fss {
>>       /* fss node has 64 bit address regions mapped to it and since 
>> the ospi
>>        * nodes is being override, override the fss node ranges as well