linux-kernel - Re: [PATCH] spi: s3c64xx: extend description of compatible's fifo

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Message-ID: <CAPLW+4n3bQOGDewkh1Yfftticp5n3sOnvmVxgNz=rnmWVf6vmg@mail.gmail.com>
Date: Fri, 14 Feb 2025 09:27:29 -0600
From: Sam Protsenko <semen.protsenko@...aro.org>
To: Tudor Ambarus <tudor.ambarus@...aro.org>
Cc: Andi Shyti <andi.shyti@...nel.org>, Mark Brown <broonie@...nel.org>, 
	Krzysztof Kozlowski <krzk@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>, 
	Denzeel Oliva <wachiturroxd150@...il.com>, linux-spi@...r.kernel.org, 
	linux-samsung-soc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] spi: s3c64xx: extend description of compatible's fifo_depth

On Fri, Feb 14, 2025 at 1:32 AM Tudor Ambarus <tudor.ambarus@...aro.org> wrote:
>
> The FIFO depth specified with the compatibles's data is used where all
> the instances of the IP define the same FIFO depth. It naturally has
> higher precedence than the FIFO depth specified via DT. Specifying FIFO
> depth in DT becomes superfluous in this case. Extend comment about
> compatible's FIFO depth.
>
> Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
> ---

Reviewed-by: Sam Protsenko <semen.protsenko@...aro.org>

>  drivers/spi/spi-s3c64xx.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
> index 389275dbc003..9c47f5741c5f 100644
> --- a/drivers/spi/spi-s3c64xx.c
> +++ b/drivers/spi/spi-s3c64xx.c
> @@ -139,7 +139,9 @@ struct s3c64xx_spi_dma_data {
>   * struct s3c64xx_spi_port_config - SPI Controller hardware info
>   * @fifo_lvl_mask: [DEPRECATED] use @{rx, tx}_fifomask instead.
>   * @rx_lvl_offset: [DEPRECATED] use @{rx,tx}_fifomask instead.
> - * @fifo_depth: depth of the FIFO.
> + * @fifo_depth: depth of the FIFOs. Used by compatibles where all the instances
> + *              of the IP define the same FIFO depth. It has higher precedence
> + *              than the FIFO depth specified via DT.
>   * @rx_fifomask: SPI_STATUS.RX_FIFO_LVL mask. Shifted mask defining the field's
>   *               length and position.
>   * @tx_fifomask: SPI_STATUS.TX_FIFO_LVL mask. Shifted mask defining the field's
>
> ---
> base-commit: 2014c95afecee3e76ca4a56956a936e23283f05b
> change-id: 20250214-spi-s3c64xx-fifo-depth-6787f108be83
>
> Best regards,
> --
> Tudor Ambarus <tudor.ambarus@...aro.org>
>