[PATCH] bsp/imx: Add cs_change support to SPI

[Chris Johns]

I think you or Sebastian are the imx maintainers so please push when you wish. :)

Thanks
Chris

On 1/10/21 4:31 pm, Christian Mauderer wrote:
> ---
>  bsps/arm/imx/spi/imx-ecspi.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/bsps/arm/imx/spi/imx-ecspi.c b/bsps/arm/imx/spi/imx-ecspi.c
> index 26ba812f62..4732b84713 100644
> --- a/bsps/arm/imx/spi/imx-ecspi.c
> +++ b/bsps/arm/imx/spi/imx-ecspi.c
> @@ -350,6 +350,9 @@ static void imx_ecspi_interrupt(void *arg)
>    } else if (bus->in_transfer > 0) {
>      regs->intreg = IMX_ECSPI_RR;
>    } else {
> +    if (bus->msg->cs_change) {
> +      imx_ecspi_set_chipsel(bus, IMX_ECSPI_CS_NONE);
> +    }
>      --bus->msg_todo;
>      ++bus->msg;
>      imx_ecspi_next_msg(bus, regs);
> @@ -376,9 +379,6 @@ static int imx_ecspi_check_messages(
>          (msg->cs > IMX_ECSPI_MAX_CHIPSELECTS || !bus->cspins[msg->cs].valid)) {
>        return -EINVAL;
>      }
> -    if (msg->cs_change != 0) {
> -      return -EINVAL;
> -    }
>  
>      ++msg;
>      --size;
> @@ -407,7 +407,9 @@ static int imx_ecspi_transfer(
>  
>      imx_ecspi_next_msg(bus, bus->regs);
>      rtems_event_transient_receive(RTEMS_WAIT, RTEMS_NO_TIMEOUT);
> -    imx_ecspi_set_chipsel(bus, IMX_ECSPI_CS_NONE);
> +    if (msgs[n-1].cs_change) {
> +      imx_ecspi_set_chipsel(bus, IMX_ECSPI_CS_NONE);
> +    }
>    }
>    return rv;
>  }
>