[PATCH v1 0/2] arm64: dts: freescale: Remove Toradex OSM Development Board ETH_A PHY interrupt

[PATCH v1 0/2] arm64: dts: freescale: Remove Toradex OSM Development Board ETH_A PHY interrupt

[Francesco Dolcini]

From: Francesco Dolcini <francesco.dolcini@toradex.com>

GPIO_A7 is a boot strap on the OSM iMX95 module. The pull-up on the OSM
Development Board Ethernet PHY interrupt line causes the module to enter USB
loader mode instead of booting normally when the reset button is held for more
than 0.5 seconds.

To resolve this issue, the PHY interrupt connection has been removed from the
carrier board, and GPIO_A7 is now exposed in the jumper area for
general-purpose use.

Since the OSM Development Board is shared across OSM modules, update the Device
Trees for OSM iMX95, iMX93 and iMX91 accordingly. The Ethernet PHY now operates
in polling mode on all three modules.

Francesco Dolcini (2):
  arm64: dts: freescale: imx95-toradex-osm-dev: Remove ETH_A PHY
    interrupt
  arm64: dts: freescale: imx93-imx91-toradex-osm-dev: Remove ETH_A PHY
    interrupt

 .../freescale/imx93-imx91-toradex-osm-dev-common.dtsi    | 6 +-----
 arch/arm64/boot/dts/freescale/imx95-toradex-osm-dev.dts  | 9 +++++----
 2 files changed, 6 insertions(+), 9 deletions(-)

-- 
2.47.3

[PATCH v1 1/2] arm64: dts: freescale: imx95-toradex-osm-dev: Remove ETH_A PHY interrupt

[Francesco Dolcini]

From: Francesco Dolcini <francesco.dolcini@toradex.com>

GPIO_A7 is a boot strap on the OSM iMX95 module. The pull-up on the OSM
Development Board Ethernet PHY interrupt line causes the module to enter
USB loader mode instead of booting normally when the reset button is
held for more than 0.5 seconds.

The PHY interrupt connection has been removed from the carrier board,
and GPIO_A7 is now available in the jumper area for general-purpose use.

Remove the PHY interrupt configuration to use polling, and move the
GPIO_A7 pinctrl configuration to the GPIO controller.

Fixes: 39be5a7e3ecc ("arm64: dts: freescale: Add Toradex OSM iMX95")
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
---
 arch/arm64/boot/dts/freescale/imx95-toradex-osm-dev.dts | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx95-toradex-osm-dev.dts b/arch/arm64/boot/dts/freescale/imx95-toradex-osm-dev.dts
index b3d54be07c43..8f56c2bafb66 100644
--- a/arch/arm64/boot/dts/freescale/imx95-toradex-osm-dev.dts
+++ b/arch/arm64/boot/dts/freescale/imx95-toradex-osm-dev.dts
@@ -115,6 +115,11 @@ &flexcan3 {
 	status = "okay";
 };
 
+&gpio1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_gpio_a7>;
+};
+
 &gpio5 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_gpio_a1>, <&pinctrl_gpio_a2>, <&pinctrl_gpio_a3>,
@@ -317,10 +322,6 @@ &netc_emdio {
 
 	ethphy_a: ethernet-phy@2 {
 		reg = <2>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&pinctrl_gpio_a7>;
-		interrupt-parent = <&gpio1>;
-		interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
 		ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
 		ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
 	};
-- 
2.47.3

Re: [PATCH v1 1/2] arm64: dts: freescale: imx95-toradex-osm-dev: Remove ETH_A PHY interrupt

[Frank Li]

On Wed, Oct 14, 2026 at 09:58:09AM +0200, Francesco Dolcini wrote:
> From: Francesco Dolcini <francesco.dolcini@toradex.com>
>
> GPIO_A7 is a boot strap on the OSM iMX95 module. The pull-up on the OSM
> Development Board Ethernet PHY interrupt line causes the module to enter
> USB loader mode instead of booting normally when the reset button is
> held for more than 0.5 seconds.
>
> The PHY interrupt connection has been removed from the carrier board,

Look like it is hardware modification, can declear the version number here

Since V_x.y, the PHY interrupt connection has been removed...

Frank

Re: [PATCH v1 1/2] arm64: dts: freescale: imx95-toradex-osm-dev: Remove ETH_A PHY interrupt

[Francesco Dolcini]

Hello Frank,

On Wed, Oct 14, 2026 at 09:20:23AM -0500, Frank Li wrote:
> On Wed, Oct 14, 2026 at 09:58:09AM +0200, Francesco Dolcini wrote:
> > From: Francesco Dolcini <francesco.dolcini@toradex.com>
> >
> > GPIO_A7 is a boot strap on the OSM iMX95 module. The pull-up on the OSM
> > Development Board Ethernet PHY interrupt line causes the module to enter
> > USB loader mode instead of booting normally when the reset button is
> > held for more than 0.5 seconds.
> >
> > The PHY interrupt connection has been removed from the carrier board,
> 
> Look like it is hardware modification, can declear the version number here
> 
> Since V_x.y, the PHY interrupt connection has been removed...

Valid point. It deserves a better explanation.

 1. There is no change in the actual board revision.
 2. Moving from interrupt to polling works always, so it does not
    require any change on the board.
 3. On our board is possible to disconnect the interrupt just removing a
    jumper. The actual board revision stay the same. This is a new
    product, that is going to be generally available in a few days. We
    are going to ship boards with such jumper removed to
    solve the i.MX95 strap option issue on reset.
 4. Future board revisions might completely disconnect the ethernet
    interrupt, removing the actual connection from the schematics. Given
    we work in polling (after this patch is merged), this will be a
    transparent change that will not create any kind of software
    incompatibility.


Should I incorporate this detailed information in the commit message and
send a v2 or the current commit message is fine ?

Francesco

[PATCH v1 2/2] arm64: dts: freescale: imx93-imx91-toradex-osm-dev: Remove ETH_A PHY interrupt

[Francesco Dolcini]

From: Francesco Dolcini <francesco.dolcini@toradex.com>

The OSM Development Board is shared across OSM modules. The Ethernet PHY
interrupt connection to GPIO_A7 has been removed to resolve a boot strap
conflict on OSM iMX95.

Update the OSM iMX93 and iMX91 Device Trees accordingly. Remove the PHY
interrupt configuration to use polling, and move the GPIO_A7 pinctrl
configuration to the GPIO controller. The pin is now available in the
jumper area for general-purpose use.

Fixes: e8a8c86875f4 ("arm64: dts: freescale: Add Toradex OSM iMX93")
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
---
 .../dts/freescale/imx93-imx91-toradex-osm-dev-common.dtsi   | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx93-imx91-toradex-osm-dev-common.dtsi b/arch/arm64/boot/dts/freescale/imx93-imx91-toradex-osm-dev-common.dtsi
index 566671b32308..24b4bf579835 100644
--- a/arch/arm64/boot/dts/freescale/imx93-imx91-toradex-osm-dev-common.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx93-imx91-toradex-osm-dev-common.dtsi
@@ -93,7 +93,7 @@ &gpio2 {
 
 &gpio4 {
 	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_gpio_a6>;
+	pinctrl-0 = <&pinctrl_gpio_a6>, <&pinctrl_gpio_a7>;
 };
 
 /* OSM I2C_B */
@@ -262,10 +262,6 @@ &mdio {
 
 	ethphy_a: ethernet-phy@2 {
 		reg = <2>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&pinctrl_gpio_a7>;
-		interrupt-parent = <&gpio4>;
-		interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
 		ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
 		ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
 	};
-- 
2.47.3