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Message-ID: <ZVsdNGyVrTJ/Kv3n@francesco-nb.int.toradex.com>
Date: Mon, 20 Nov 2023 09:47:48 +0100
From: Francesco Dolcini <francesco@...cini.it>
To: linux@...ler.io
Cc: Stefan Moring <stefan.moring@...hnolution.nl>,
Linux regressions mailing list <regressions@...ts.linux.dev>,
Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
linux-spi@...r.kernel.org
Subject: Re: spi: imx: Increase imx51 ecspi burst length fails on imx6dl and
imx8mm
On Mon, Nov 20, 2023 at 09:27:10AM +0100, linux@...ler.io wrote:
> Load the spi-dma (imx-sdma 302c0000.dma-controller: loaded firmware
> 4.5), run the spi_imx and the spidev as kenelmodule.
>
> I run the code on a Toradex Verdin Development Board and use the
> imx8mm-verdin-nonwifi-dev.dts
>
> To add the spidev I patched imx8mm-verdin.dtsi
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
> index 6f0811587142..262500940adc 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi
> @@ -209,6 +209,15 @@ &ecspi2 {
> cs-gpios = <&gpio5 13 GPIO_ACTIVE_LOW>;
> pinctrl-names = "default";
> pinctrl-0 = <&pinctrl_ecspi2>;
> +
> + spidev@0{
> + compatible = "micron,spi-authenta";
> + reg = <0>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + spi-max-frequency = <20000000>;
> + status = "okay";
> + };
> };
>
> as a spidev test program I used
> https://raw.githubusercontent.com/raspberrypi/linux/rpi-3.10.y/Documentation/spi/spidev_test.c
Would you mind doing the following tests looping the SPI interface MISO/MOSI?
```
cd /tmp
dd if=/dev/urandom of=4k-spi-test-data.bin bs=1 count=4k
spidev_test -D "$device" -s 4000000 -i 4k-spi-test-data.bin -o 4k-spi-test-result.bin
dd if=/dev/urandom of=16bytes-spi-test-data.bin bs=1 count=16
spidev_test -D "$device" -s 16000 -i 16bytes-spi-test-data.bin -o 16bytes-spi-test-result.bin
```
with "$device" being your actual spidev device?
Those tests are passing on 6.7.0-rc2 for me.
Francesco
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