linux-kernel - Re: [PATCH v6 2/3] spi: spacemit: introduce SpacemiT K1 SPI controller driver

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Message-ID: <FFC4D2691116C9D4+aQAgeeG28SpSI7YR@kernel.org>
Date: Tue, 28 Oct 2025 09:46:33 +0800
From: Troy Mitchell <troy.mitchell@...ux.spacemit.com>
To: Alex Elder <elder@...cstar.com>, broonie@...nel.org, dlan@...too.org
Cc: p.zabel@...gutronix.de, linux-spi@...r.kernel.org,
	spacemit@...ts.linux.dev, linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Troy Mitchell <troy.mitchell@...ux.spacemit.com>
Subject: Re: [PATCH v6 2/3] spi: spacemit: introduce SpacemiT K1 SPI
 controller driver

On Mon, Oct 27, 2025 at 07:55:02AM -0500, Alex Elder wrote:
> This patch introduces the driver for the SPI controller found in the
> SpacemiT K1 SoC.  Currently the driver supports master mode only.
> The SPI hardware implements RX and TX FIFOs, 32 entries each, and
> supports both PIO and DMA mode transfers.
> 
> Signed-off-by: Alex Elder <elder@...cstar.com>
> ---
>  drivers/spi/Kconfig           |   9 +
>  drivers/spi/Makefile          |   1 +
>  drivers/spi/spi-spacemit-k1.c | 965 ++++++++++++++++++++++++++++++++++
>  3 files changed, 975 insertions(+)
>  create mode 100644 drivers/spi/spi-spacemit-k1.c
> 
> diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
> index 4d8f00c850c14..2e933edab1718 100644
> --- a/drivers/spi/Kconfig
> +++ b/drivers/spi/Kconfig
> @@ -1071,6 +1071,15 @@ config SPI_SG2044_NOR
>  	  also supporting 3Byte address devices and 4Byte address
>  	  devices.
>  
> +config SPI_SPACEMIT_K1
> +	tristate "K1 SPI Controller"
> +	depends on ARCH_SPACEMIT || COMPILE_TEST
> +	depends on OF
> +	imply MMP_PDMA if ARCH_SPACEMIT
> +	default ARCH_SPACEMIT
SPI needs to be a built-in feature?
if not, how about:
default m if ARCH_SPACEMIT

                  - Troy