[PATCH v1 0/2] spi: spidev: Add Toradex LAVA HAT

[PATCH v1 0/2] spi: spidev: Add Toradex LAVA HAT

[Francesco Dolcini]

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

Add a compatible string for the SPI loopback device present on the
Toradex LAVA HAT test fixture and add it to the spidev driver.

The Toradex LAVA HAT is a board used for automated hardware-in-the-loop
(HIL) testing, it provides several test-related functionalities, and
exists in multiple variants depending on the board it is mated with. The
SPI function is implemented with a loopback on the MISO/MOSI signals.

Link: https://lore.kernel.org/all/20260310133254.GA51497@francesco-nb/
Link: https://lore.kernel.org/all/20260316073547.11437-3-francesco@dolcini.it/

Francesco Dolcini (2):
  dt-bindings: trivial-devices: add toradex,lava-hat-spi
  spi: spidev: Add Toradex LAVA HAT OF compatible

 Documentation/devicetree/bindings/trivial-devices.yaml | 2 ++
 drivers/spi/spidev.c                                   | 2 ++
 2 files changed, 4 insertions(+)

-- 
2.47.3

[PATCH v1 1/2] dt-bindings: trivial-devices: add toradex,lava-hat-spi

[Francesco Dolcini]

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

Add a compatible string for the SPI loopback device present on the
Toradex LAVA HAT test fixture.

The Toradex LAVA HAT is a board used for automated hardware-in-the-loop
(HIL) testing, it provides several test-related functionalities, and
exists in multiple variants depending on the board it is mated with. The
SPI function is implemented with a loopback on the MISO/MOSI signals.

As the device can be fully described using only "compatible" and "reg",
it is appropriate to list it under trivial-devices.yaml rather than
introducing a dedicated binding.

The SPI implementation is identical across all Toradex LAVA HAT
variants, so a single compatible string is sufficient.

Link: https://lore.kernel.org/all/20260310133254.GA51497@francesco-nb/
Link: https://lore.kernel.org/all/20260316073547.11437-3-francesco@dolcini.it/
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
---
 Documentation/devicetree/bindings/trivial-devices.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Documentation/devicetree/bindings/trivial-devices.yaml
index 23fd4513933a..95e78ff804af 100644
--- a/Documentation/devicetree/bindings/trivial-devices.yaml
+++ b/Documentation/devicetree/bindings/trivial-devices.yaml
@@ -519,6 +519,8 @@ properties:
           - ti,tps546d24
             # I2C Touch-Screen Controller
           - ti,tsc2003
+            # Toradex Lava Hat SPI
+          - toradex,lava-hat-spi
             # Winbond/Nuvoton H/W Monitor
           - winbond,w83793
 
-- 
2.47.3

[PATCH v1 2/2] spi: spidev: Add Toradex LAVA HAT OF compatible

[Francesco Dolcini]

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

Add "toradex,lava-hat-spi" OF compatible, that describes the SPI
interface implemented in the Toradex LAVA HAT. The Toradex
LAVA HAT is a test fixture used in Toradex automated testing lab, it
provides various functionality, including SPI MISO-MOSI loopback on
various SPI interface.

Link: https://lore.kernel.org/all/20260310133254.GA51497@francesco-nb/
Link: https://lore.kernel.org/all/20260316073547.11437-3-francesco@dolcini.it/
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
---
 drivers/spi/spidev.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index 638221178384..2a92dfdc5331 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -701,6 +701,7 @@ static const struct spi_device_id spidev_spi_ids[] = {
 	{ .name = /* semtech */ "sx1301" },
 	{ .name = /* silabs */ "em3581" },
 	{ .name = /* silabs */ "si3210" },
+	{ .name = /* toradex */ "lava-hat-spi" },
 	{},
 };
 MODULE_DEVICE_TABLE(spi, spidev_spi_ids);
@@ -735,6 +736,7 @@ static const struct of_device_id spidev_dt_ids[] = {
 	{ .compatible = "semtech,sx1301", .data = &spidev_of_check },
 	{ .compatible = "silabs,em3581", .data = &spidev_of_check },
 	{ .compatible = "silabs,si3210", .data = &spidev_of_check },
+	{ .compatible = "toradex,lava-hat-spi", .data = &spidev_of_check },
 	{},
 };
 MODULE_DEVICE_TABLE(of, spidev_dt_ids);
-- 
2.47.3

Re: [PATCH v1 1/2] dt-bindings: trivial-devices: add toradex,lava-hat-spi

[Conor Dooley]

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On Mon, Apr 20, 2026 at 01:45:35PM +0200, Francesco Dolcini wrote:
> From: Francesco Dolcini <francesco.dolcini@toradex.com>
> 
> Add a compatible string for the SPI loopback device present on the
> Toradex LAVA HAT test fixture.
> 
> The Toradex LAVA HAT is a board used for automated hardware-in-the-loop
> (HIL) testing, it provides several test-related functionalities, and
> exists in multiple variants depending on the board it is mated with. The
> SPI function is implemented with a loopback on the MISO/MOSI signals.
> 
> As the device can be fully described using only "compatible" and "reg",
> it is appropriate to list it under trivial-devices.yaml rather than
> introducing a dedicated binding.
> 
> The SPI implementation is identical across all Toradex LAVA HAT
> variants, so a single compatible string is sufficient.
> 
> Link: https://lore.kernel.org/all/20260310133254.GA51497@francesco-nb/
> Link: https://lore.kernel.org/all/20260316073547.11437-3-francesco@dolcini.it/
> Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>

Acked-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

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Re: [PATCH v1 1/2] dt-bindings: trivial-devices: add toradex,lava-hat-spi

[Krzysztof Kozlowski]

On 20/04/2026 18:02, Conor Dooley wrote:
> On Mon, Apr 20, 2026 at 01:45:35PM +0200, Francesco Dolcini wrote:
>> From: Francesco Dolcini <francesco.dolcini@toradex.com>
>>
>> Add a compatible string for the SPI loopback device present on the
>> Toradex LAVA HAT test fixture.
>>
>> The Toradex LAVA HAT is a board used for automated hardware-in-the-loop
>> (HIL) testing, it provides several test-related functionalities, and
>> exists in multiple variants depending on the board it is mated with. The
>> SPI function is implemented with a loopback on the MISO/MOSI signals.
>>
>> As the device can be fully described using only "compatible" and "reg",
>> it is appropriate to list it under trivial-devices.yaml rather than
>> introducing a dedicated binding.
>>
>> The SPI implementation is identical across all Toradex LAVA HAT
>> variants, so a single compatible string is sufficient.
>>
>> Link: https://lore.kernel.org/all/20260310133254.GA51497@francesco-nb/
>> Link: https://lore.kernel.org/all/20260316073547.11437-3-francesco@dolcini.it/
>> Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
> 
> Acked-by: Conor Dooley <conor.dooley@microchip.com>
> pw-bot: not-applicable


Heh, let's wait. That's a test device, so it won't be ever used in any
final product, right? So not in final DTS?

Then why it's here? I think I directed previously to document it with
the rest of test devices - in incomplete-devices schema?

Best regards,
Krzysztof

Re: [PATCH v1 1/2] dt-bindings: trivial-devices: add toradex,lava-hat-spi

[Conor Dooley]

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On Mon, Apr 20, 2026 at 06:10:08PM +0200, Krzysztof Kozlowski wrote:
> On 20/04/2026 18:02, Conor Dooley wrote:
> > On Mon, Apr 20, 2026 at 01:45:35PM +0200, Francesco Dolcini wrote:
> >> From: Francesco Dolcini <francesco.dolcini@toradex.com>
> >>
> >> Add a compatible string for the SPI loopback device present on the
> >> Toradex LAVA HAT test fixture.
> >>
> >> The Toradex LAVA HAT is a board used for automated hardware-in-the-loop
> >> (HIL) testing, it provides several test-related functionalities, and
> >> exists in multiple variants depending on the board it is mated with. The
> >> SPI function is implemented with a loopback on the MISO/MOSI signals.
> >>
> >> As the device can be fully described using only "compatible" and "reg",
> >> it is appropriate to list it under trivial-devices.yaml rather than
> >> introducing a dedicated binding.
> >>
> >> The SPI implementation is identical across all Toradex LAVA HAT
> >> variants, so a single compatible string is sufficient.
> >>
> >> Link: https://lore.kernel.org/all/20260310133254.GA51497@francesco-nb/
> >> Link: https://lore.kernel.org/all/20260316073547.11437-3-francesco@dolcini.it/
> >> Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
> > 
> > Acked-by: Conor Dooley <conor.dooley@microchip.com>
> > pw-bot: not-applicable
> 
> 
> Heh, let's wait. That's a test device, so it won't be ever used in any
> final product, right? So not in final DTS?
> 
> Then why it's here? I think I directed previously to document it with
> the rest of test devices - in incomplete-devices schema?

Oh it's that, I forgot about this discussion, sorry!

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