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Some of the I2C buses are required to operate at different voltage level
compared to other I2C buses eg. I2C bus to Google Security Chip (GSC)
should be at 1.8V level. By default, all the I2C buses are initialized
to operate at 3.3 V. Add support to configure I2C pad RX select through
devicetree and update the concerned devicetree.
BUG=b:188538373
TEST=Build and boot to OS in Guybrush. Ensure that the communication
with GSC is fine. Build Majolica mainboard.
Change-Id: I595a64736fdac0274abffb68c5e521302275b845
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55149
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
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if ENV_X86 is not true we had several compile errors in i2c code. Fix
them before we add code for psp_verstage which is non-x86.
BUG=b:182477057
BRANCH=none
TEST=build
Signed-off-by: Kangheui Won <khwon@chromium.org>
Change-Id: I0796671dd34ab2d0f123c904a88c57cdad116a57
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52538
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
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Add macros, settings and callbacks to support I2C for cezanne.
Change-Id: Ic480681d4b7c6fb8591e729090e4faeb5fccf800
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51025
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
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