linux-kernel - Re: [LINUX PATCH v2 3/3] spi: spi-mem: Add support for Zynq QSPI controller

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Date:   Mon, 8 Apr 2019 10:51:57 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Naga Sureshkumar Relli <naga.sureshkumar.relli@...inx.com>
Cc:     broonie@...nel.org, bbrezillon@...nel.org, vigneshr@...com,
        linux-spi@...r.kernel.org, dwmw2@...radead.org,
        marek.vasut@...il.com, richard@....at,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        michal.simek@...inx.com, nagasuresh12@...il.com
Subject: Re: [LINUX PATCH v2 3/3] spi: spi-mem: Add support for Zynq QSPI
 controller

On Mon, Apr 01, 2019 at 01:29:13PM +0530, Naga Sureshkumar Relli wrote:
> Add support for QSPI controller driver used by Xilinx Zynq SOC.
> 
> Signed-off-by: Naga Sureshkumar Relli <naga.sureshkumar.relli@...inx.com>
> ---
> Changes in v2
>  - Updated the driver to call spi_mem_default_supports_op() from
>    ctrl->supports_op()
> Changes in v1
>  - Added COMPILE_TEST macro
>  - converted MASKs to GENMASK() and BIT() macros
>  - Renamed MODEBITS to ZYNQ_QSPI_MODEBITS
>  - Removed checking buswidth() code, as it is already handled by framework
>  - Updated in comments regarding baud rate calculation
> ---
>  drivers/spi/Kconfig         |  10 +-
>  drivers/spi/Makefile        |   1 +
>  drivers/spi/spi-zynq-qspi.c | 761 ++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 771 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/spi/spi-zynq-qspi.c
> 
> diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
> index 9f89cb1..7bf7d38 100644
> --- a/drivers/spi/Kconfig
> +++ b/drivers/spi/Kconfig
> @@ -816,9 +816,17 @@ config SPI_XTENSA_XTFPGA
>  	  16 bit words in SPI mode 0, automatically asserting CS on transfer
>  	  start and deasserting on end.
>  
> +config SPI_ZYNQ_QSPI
> +	tristate "Xilinx Zynq QSPI controller"
> +	depends on ARCH_ZYNQ || COMPILE_TEST

This results in

drivers/spi/spi-zynq-qspi.c: In function 'zynq_qspi_write_op':
drivers/spi/spi-zynq-qspi.c:410:3: error: implicit declaration of function 'writesl'; did you mean 'writel'?

drivers/spi/spi-zynq-qspi.c: In function 'zynq_qspi_read_op':
drivers/spi/spi-zynq-qspi.c:436:3: error: implicit declaration of function 'readsl'; did you mean 'readl'?

when building allmodconfig/allyesconfig on architectures not supporting
writesl/readsl (such as alpha or parisc).

Guenter