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Apparently Intel had decided to use different clock speeds for
some of its IP blocks in some of its designs. The i2c designware driver
has already been moved into common code allowing for its own Kconfig
value. That currently leaves SPI (UART isn't using the clock currently).
Therefore, remove SOC_INTEL_COMMON_LPSS_CLOCK_MHZ and add
SOC_INTEL_COMMON_BLOCK_GSPI_CLOCK_MHZ to allow for the different clock
speeds present in the system for the various IP blocks.
BUG=b:75306520
Change-Id: I6cb8c2de0ff446b6006bc37645fca64f2b70bf17
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/25608
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Hannah Williams <hannah.williams@intel.com>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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Even though kaby lake and cannon lake are using the same GSPI
controller, bit meanings (for polarity and state) in SPI_CS_CONTROL
register are significantly different. This change provides a new
Kconfig option that can be selected by SoCs using these new bit
definitions of SPI_CS_CONTROL. Common code takes care of setting the
right value for polarity and state field depending upon the version
selected by SoC.
BUG=b:70628116
Change-Id: Ic69321483a58bb29f939b0d8b37f33ca30eb53b8
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/22954
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Shelley Chen <shchen@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
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Add support for GSPI controller in Intel PCH. This controller is
compliant with PXA2xx SPI controller with some additional registers to
provide more fine-grained control of the SPI bus. Currently, DMA is
not enabled as this driver might be used before memory is up (e.g. TPM
on SPI).
Also, provide common GSPI config structure that can be included by
SoCs in chip config to allow mainboards to configure GSPI
bus. Additionally, provide an option for SoCs to configure BAR for
GSPI controllers before memory is up.
BUG=b:35583330
Change-Id: I0eb91eba2c523be457fee8922c44fb500a9fa140
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/19098
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
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