Traditionally, firmware loading for Serial Engines (SE) in the QUP hardware
of Qualcomm SoCs has been managed by TrustZone (TZ). While this approach
ensures secure SE assignment and access control, it limits flexibility for
developers who need to enable various protocols on different SEs.

Add the firmware-name property to QUPv3 nodes in the device tree to enable
firmware loading from the Linux environment. Handle SE assignments and
access control permissions directly within Linux, removing the dependency
on TrustZone.

Signed-off-by: Viken Dadhaniya <viken.dadhaniya@oss.qualcomm.com>
---
v1 -> v2:

- Updated the commit log.

v1 Link: https://lore.kernel.org/all/20250923143431.3490452-1-viken.dadhaniya@oss.qualcomm.com/
---
 arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
index 18cea8812001..4e361580ddf1 100644
--- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
+++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
@@ -1009,10 +1009,12 @@ &qup_uart7_tx {
 };
 
 &qupv3_id_0 {
+	firmware-name = "qcom/qcs6490/qupv3fw.elf";
 	status = "okay";
 };
 
 &qupv3_id_1 {
+	firmware-name = "qcom/qcs6490/qupv3fw.elf";
 	status = "okay";
 };
 
-- 
2.34.1

On Tue, Sep 23, 2025 at 09:41:07PM +0530, Viken Dadhaniya wrote:
> Traditionally, firmware loading for Serial Engines (SE) in the QUP hardware
> of Qualcomm SoCs has been managed by TrustZone (TZ). While this approach
> ensures secure SE assignment and access control, it limits flexibility for
> developers who need to enable various protocols on different SEs.
> 
> Add the firmware-name property to QUPv3 nodes in the device tree to enable
> firmware loading from the Linux environment. Handle SE assignments and
> access control permissions directly within Linux, removing the dependency
> on TrustZone.
> 
> Signed-off-by: Viken Dadhaniya <viken.dadhaniya@oss.qualcomm.com>
> ---
> v1 -> v2:
> 
> - Updated the commit log.
> 
> v1 Link: https://lore.kernel.org/all/20250923143431.3490452-1-viken.dadhaniya@oss.qualcomm.com/
> ---
>  arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 2 ++
>  1 file changed, 2 insertions(+)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>


-- 
With best wishes
Dmitry