[PATCH 0/3] Enable quad SPI mode for SPI-NAND on IPQ RDP boards

[PATCH 0/3] Enable quad SPI mode for SPI-NAND on IPQ RDP boards

[Md Sadre Alam]

Several Qualcomm IPQ RDP platforms support quad (x4) SPI transfers
between the QPIC SPI-NAND controller and the attached SPI-NAND device.
However, the corresponding device trees do not currently describe the
bus width capabilities of the flash device, causing transfers to fall
back to the default single-bit (x1) mode.

This series enables quad SPI operation on supported IPQ reference
design platforms by adding spi-rx-bus-width and spi-tx-bus-width
properties to the SPI-NAND device nodes.

The series updates the IPQ9574, IPQ5424 and IPQ5332 based RDPs.

Signed-off-by: Md Sadre Alam <md.alam@oss.qualcomm.com>
---
Md Sadre Alam (3):
      arm64: dts: qcom: ipq9574-rdp-common: Enable quad SPI mode for SPI-NAND
      arm64: dts: qcom: ipq5424-rdp466: Enable quad SPI mode for SPI-NAND
      arm64: dts: qcom: ipq5332-rdp-common: Enable quad SPI mode for SPI-NAND

 arch/arm64/boot/dts/qcom/ipq5332-rdp-common.dtsi | 2 ++
 arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts      | 2 ++
 arch/arm64/boot/dts/qcom/ipq9574-rdp-common.dtsi | 2 ++
 3 files changed, 6 insertions(+)
---
base-commit: 19827e7930a5511c68e12aac6e4522f3661a1709
change-id: 20260716-quad_dts-6bac0484c08c
prerequisite-change-id: 20260716-quad-ec2765317214:v1
prerequisite-patch-id: 912ede01168ddf0476ba69ab0db786186073f817
prerequisite-patch-id: cdb88acd348e7dc5136fa9b94cc06dcafb0f478d
prerequisite-patch-id: 932ca3dc3893df6de25928b24c7c24550907088d

Best regards,
-- 
Md Sadre Alam <md.alam@oss.qualcomm.com>

[PATCH 1/3] arm64: dts: qcom: ipq9574-rdp-common: Enable quad SPI mode for SPI-NAND

[Md Sadre Alam]

Set the SPI-NAND device node to use 4-bit transmit and receive bus widths.

The board supports quad SPI transfers, but the device tree currently does
not describe the wider bus. Add spi-tx-bus-width and spi-rx-bus-width so
the controller and flash can use quad mode instead of single-bit transfers.

Signed-off-by: Md Sadre Alam <md.alam@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/ipq9574-rdp-common.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/ipq9574-rdp-common.dtsi b/arch/arm64/boot/dts/qcom/ipq9574-rdp-common.dtsi
index 62877b46f9b3..86138529ba77 100644
--- a/arch/arm64/boot/dts/qcom/ipq9574-rdp-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq9574-rdp-common.dtsi
@@ -249,6 +249,8 @@ flash@0 {
 		nand-ecc-engine = <&qpic_nand>;
 		nand-ecc-strength = <4>;
 		nand-ecc-step-size = <512>;
+		spi-rx-bus-width = <4>;
+		spi-tx-bus-width = <4>;
 	};
 };
 

-- 
2.34.1

[PATCH 2/3] arm64: dts: qcom: ipq5424-rdp466: Enable quad SPI mode for SPI-NAND

[Md Sadre Alam]

Enable quad SPI transfers for the SPI-NAND device by setting both spi-rx-
bus-width and spi-tx-bus-width to 4.

Without these properties, the device uses the default single-bit bus width.
Configure the board to use 4-bit read and write transfers so the controller
and flash can operate in quad SPI mode.

Signed-off-by: Md Sadre Alam <md.alam@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts b/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
index be8657239c46..793afc3ee82e 100644
--- a/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
+++ b/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
@@ -261,6 +261,8 @@ flash@0 {
 		nand-ecc-engine = <&qpic_nand>;
 		nand-ecc-strength = <4>;
 		nand-ecc-step-size = <512>;
+		spi-rx-bus-width = <4>;
+		spi-tx-bus-width = <4>;
 	};
 };
 

-- 
2.34.1

[PATCH 3/3] arm64: dts: qcom: ipq5332-rdp-common: Enable quad SPI mode for SPI-NAND

[Md Sadre Alam]

The SPI-NAND device on the IPQ5332 RDP supports 4-bit data transfers, but
the device tree does not describe the bus width, so transfers use the
default single-bit mode.

Set spi-rx-bus-width and spi-tx-bus-width to 4 to enable quad read and
write transfers and improve SPI-NAND throughput.

Signed-off-by: Md Sadre Alam <md.alam@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/ipq5332-rdp-common.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/ipq5332-rdp-common.dtsi b/arch/arm64/boot/dts/qcom/ipq5332-rdp-common.dtsi
index 3bbf748f2e5c..6f5b193a204b 100644
--- a/arch/arm64/boot/dts/qcom/ipq5332-rdp-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq5332-rdp-common.dtsi
@@ -141,5 +141,7 @@ flash@0 {
 		nand-ecc-engine = <&qpic_nand>;
 		nand-ecc-strength = <4>;
 		nand-ecc-step-size = <512>;
+		spi-rx-bus-width = <4>;
+		spi-tx-bus-width = <4>;
 	};
 };

-- 
2.34.1

Re: [PATCH 0/3] Enable quad SPI mode for SPI-NAND on IPQ RDP boards

[Mukesh Ojha]

On Thu, Jul 16, 2026 at 11:25:11AM +0530, Md Sadre Alam wrote:
> Several Qualcomm IPQ RDP platforms support quad (x4) SPI transfers
> between the QPIC SPI-NAND controller and the attached SPI-NAND device.
> However, the corresponding device trees do not currently describe the
> bus width capabilities of the flash device, causing transfers to fall
> back to the default single-bit (x1) mode.
> 
> This series enables quad SPI operation on supported IPQ reference
> design platforms by adding spi-rx-bus-width and spi-tx-bus-width
> properties to the SPI-NAND device nodes.
> 
> The series updates the IPQ9574, IPQ5424 and IPQ5332 based RDPs.
> 
> Signed-off-by: Md Sadre Alam <md.alam@oss.qualcomm.com>
> ---
> Md Sadre Alam (3):
>       arm64: dts: qcom: ipq9574-rdp-common: Enable quad SPI mode for SPI-NAND
>       arm64: dts: qcom: ipq5424-rdp466: Enable quad SPI mode for SPI-NAND
>       arm64: dts: qcom: ipq5332-rdp-common: Enable quad SPI mode for SPI-NAND
> 
>  arch/arm64/boot/dts/qcom/ipq5332-rdp-common.dtsi | 2 ++
>  arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts      | 2 ++
>  arch/arm64/boot/dts/qcom/ipq9574-rdp-common.dtsi | 2 ++
>  3 files changed, 6 insertions(+)
> ---
> base-commit: 19827e7930a5511c68e12aac6e4522f3661a1709
> change-id: 20260716-quad_dts-6bac0484c08c
> prerequisite-change-id: 20260716-quad-ec2765317214:v1

Above does not help.  Be explicit here in the cover letter by
providing the dependency link directly.

> prerequisite-patch-id: 912ede01168ddf0476ba69ab0db786186073f817
> prerequisite-patch-id: cdb88acd348e7dc5136fa9b94cc06dcafb0f478d
> prerequisite-patch-id: 932ca3dc3893df6de25928b24c7c24550907088d
> 
> Best regards,
> -- 
> Md Sadre Alam <md.alam@oss.qualcomm.com>
> 

-- 
-Mukesh Ojha

Re: [PATCH 1/3] arm64: dts: qcom: ipq9574-rdp-common: Enable quad SPI mode for SPI-NAND

[Konrad Dybcio]

On 7/16/26 7:55 AM, Md Sadre Alam wrote:
> Set the SPI-NAND device node to use 4-bit transmit and receive bus widths.
> 
> The board supports quad SPI transfers, but the device tree currently does
> not describe the wider bus. Add spi-tx-bus-width and spi-rx-bus-width so
> the controller and flash can use quad mode instead of single-bit transfers.
> 
> Signed-off-by: Md Sadre Alam <md.alam@oss.qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

Re: [PATCH 2/3] arm64: dts: qcom: ipq5424-rdp466: Enable quad SPI mode for SPI-NAND

[Konrad Dybcio]

On 7/16/26 7:55 AM, Md Sadre Alam wrote:
> Enable quad SPI transfers for the SPI-NAND device by setting both spi-rx-
> bus-width and spi-tx-bus-width to 4.
> 
> Without these properties, the device uses the default single-bit bus width.
> Configure the board to use 4-bit read and write transfers so the controller
> and flash can operate in quad SPI mode.
> 
> Signed-off-by: Md Sadre Alam <md.alam@oss.qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

Re: [PATCH 3/3] arm64: dts: qcom: ipq5332-rdp-common: Enable quad SPI mode for SPI-NAND

[Konrad Dybcio]

On 7/16/26 7:55 AM, Md Sadre Alam wrote:
> The SPI-NAND device on the IPQ5332 RDP supports 4-bit data transfers, but
> the device tree does not describe the bus width, so transfers use the
> default single-bit mode.
> 
> Set spi-rx-bus-width and spi-tx-bus-width to 4 to enable quad read and
> write transfers and improve SPI-NAND throughput.
> 
> Signed-off-by: Md Sadre Alam <md.alam@oss.qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

Re: [PATCH 0/3] Enable quad SPI mode for SPI-NAND on IPQ RDP boards

[Md Sadre Alam]

On Thu, Jul 16, 2026 at 12:17:33PM +0530, Mukesh Ojha wrote:
> On Thu, Jul 16, 2026 at 11:25:11AM +0530, Md Sadre Alam wrote:
> > Several Qualcomm IPQ RDP platforms support quad (x4) SPI transfers
> > between the QPIC SPI-NAND controller and the attached SPI-NAND device.
> > However, the corresponding device trees do not currently describe the
> > bus width capabilities of the flash device, causing transfers to fall
> > back to the default single-bit (x1) mode.
> > 
> > This series enables quad SPI operation on supported IPQ reference
> > design platforms by adding spi-rx-bus-width and spi-tx-bus-width
> > properties to the SPI-NAND device nodes.
> > 
> > The series updates the IPQ9574, IPQ5424 and IPQ5332 based RDPs.
> > 
> > Signed-off-by: Md Sadre Alam <md.alam@oss.qualcomm.com>
> > ---
> > Md Sadre Alam (3):
> >       arm64: dts: qcom: ipq9574-rdp-common: Enable quad SPI mode for SPI-NAND
> >       arm64: dts: qcom: ipq5424-rdp466: Enable quad SPI mode for SPI-NAND
> >       arm64: dts: qcom: ipq5332-rdp-common: Enable quad SPI mode for SPI-NAND
> > 
> >  arch/arm64/boot/dts/qcom/ipq5332-rdp-common.dtsi | 2 ++
> >  arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts      | 2 ++
> >  arch/arm64/boot/dts/qcom/ipq9574-rdp-common.dtsi | 2 ++
> >  3 files changed, 6 insertions(+)
> > ---
> > base-commit: 19827e7930a5511c68e12aac6e4522f3661a1709
> > change-id: 20260716-quad_dts-6bac0484c08c
> > prerequisite-change-id: 20260716-quad-ec2765317214:v1
> 
> Above does not help.  Be explicit here in the cover letter by
> providing the dependency link directly.

Updated in revision 2 [1]. Please review

Thanks,
Alam.

1 - https://lore.kernel.org/linux-arm-msm/20260807-quad_dts-v2-0-6f578d4152b7@oss.qualcomm.com/