[v4 07/12] spi-mem: Add dirmap API from Linux

[Jagan Teki]

On Tue, May 24, 2022 at 11:28 AM Chin-Ting Kuo
<chin-ting_kuo at aspeedtech.com> wrote:
>
> This adds the dirmap API originally introduced in Linux commit aa167f3
> ("spi: spi-mem: Add a new API to support direct mapping"). This also
> includes several follow-up patches and fixes.
>
> Changes from Linux include:
> * Added Kconfig option
> * Changed struct device to struct udevice
> * Changed struct spi_mem to struct spi_slave
>
> This patch is obtained from the following patch
> https://patchwork.ozlabs.org/project/uboot/patch/20210205043924.149504-3-seanga2@gmail.com/
>
> Signed-off-by: Chin-Ting Kuo <chin-ting_kuo at aspeedtech.com>
> Signed-off-by: Sean Anderson <seanga2 at gmail.com>
> Acked-by: Pratyush Yadav <p.yadav at ti.com>
> ---
> v2: Remove "#if CONFIG_SPI_DIRMAP" compile wrapper.
> v3: Fix a grammatical error in spi-mem.h.
>
>  drivers/spi/Kconfig   |  10 ++
>  drivers/spi/spi-mem.c | 268 ++++++++++++++++++++++++++++++++++++++++++
>  include/spi-mem.h     |  79 +++++++++++++
>  3 files changed, 357 insertions(+)
>
> diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
> index a616294910..297253714a 100644
> --- a/drivers/spi/Kconfig
> +++ b/drivers/spi/Kconfig
> @@ -40,6 +40,16 @@ config SPI_MEM
>           This extension is meant to simplify interaction with SPI memories
>           by providing an high-level interface to send memory-like commands.
>
> +config SPI_DIRMAP

Look like the following code is not part of this if construct, we need
that to build only when SPI_DIRMAP is defined otherwise it footprint
increase for non-DIRMAPs. Also please take care of unnecessary code
while copying from Linux and add SHA1 in the commit message.

Jagan.