soc/amd/common/block/spi: introduce SOC_AMD_COMMON_BLOCK_SPI_4DW_BURST

Add a new Kconfig option to enable or disable the 4 DWORD burst support
of the SPI controller and use this setting to determine if the
corresponding feature bit in SPI100_HOST_PREF_CONFIG will be set or
cleared. Since fch_spi_disable_4dw_burst can now enable or disable the
feature, rename it to fch_spi_configure_4dw_burst. On Stoneyridge the
SPI_RD4DW_EN_HOST bit needs to be cleared (see the Rd4dw_en_host bit
definition in the SPIx2C SPI100 Host Prefetch Config register in the
public BKDG #55072 Rev 3.09), so add a SoC dependency to the Kconfig
option.

Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Id754fa8d5f9554ed25cf9f3341bfdd1968693788
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56814
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jason Glenesk <jason.glenesk@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>

0 files changed, 0 insertions, 0 deletions