• Patrick Delaunay's avatar
    dm: spi: Read default speed and mode values from DT · b0cc1b84
    Patrick Delaunay authored
    This patch update the behavior introduced by
    commit 96907c0f ("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: default avatarPatrick Delaunay <patrick.delaunay@st.com>
    Acked-by: default avatarJagan Teki <jagan@amarulasolutions.com>
    b0cc1b84