[U-Boot] [PATCH v4] dm: spi: Read default speed and mode values from DT

[Jagan Teki]

On Wed, Feb 27, 2019 at 8:06 PM Patrick Delaunay
<patrick.delaunay at st.com> wrote:
>
> This patch update the behavior introduced by
> commit 96907c0fe50a ("dm: spi: Read default speed and mode values from DT")
>
> In case of DT boot, don't read default speed and mode for SPI from
> CONFIG_* but instead read from DT node. This will make sure that boards
> with multiple SPI/QSPI controllers can be probed at different
> bus frequencies and SPI modes.
>
> Remove also use in boards of the value speed=0 (no more supported)
> for ENV in SPI by using CONFIG_ENV_SPI_MAX_HZ=0.
>
> DT values will be always used when available (full DM support of
> SPI slave with available DT node) even if speed and mode are requested;
> for example in splash screen support (in splash_sf_read_raw)
> or in SPL boot (in spl_spi_load_image).
> The caller of spi_get_bus_and_cs() no more need to force speed=0.
>
> But the current behavior don't change if the SPI slave is not
> present (device with generic driver is created automatically)
> or if platdata is used (CONFIG_OF_PLATDATA).
>
> Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
> ---
>

Applied to u-boot-spi/master