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Diffstat (limited to 'zephyr/Kconfig.host_interface')
| -rw-r--r-- | zephyr/Kconfig.host_interface | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/zephyr/Kconfig.host_interface b/zephyr/Kconfig.host_interface new file mode 100644 index 0000000000..242406a14e --- /dev/null +++ b/zephyr/Kconfig.host_interface @@ -0,0 +1,59 @@ +# Copyright 2021 The Chromium OS Authors. All rights reserved. +# Use of this source code is governed by a BSD-style license that can be +# found in the LICENSE file. + +if PLATFORM_EC_HOSTCMD + +choice PLATFORM_EC_HOST_INTERFACE_TYPE + prompt "Select the host interface type" + default PLATFORM_EC_HOST_INTERFACE_ESPI if AP_X86 + default PLATFORM_EC_HOST_INTERFACE_SHI if AP_ARM + help + The AP communicates with the EC using one of several host interface + types. The selection of the host interface type is based on the + capability of both the AP and the EC. + + x86-compatible application processors typically use the enhanced SPI + (ESPI) interface while other application processors use the SPI host + interface (SHI). + +config PLATFORM_EC_HOST_INTERFACE_ESPI + bool "eSPI" + depends on ESPI && AP + help + Enable the Enhanced Serial Peripheral Interface (eSPI) host interface. + eSPI supports a shared physical connection between several on-board + devices, similar to SPI. It adds a few optional signals and a protocol + layer to provide independent 'channels' for each device to communicate + over. + + eSPI is the replacement for LPC (Low-Pin-Count bus). + + See here for information about eSPI: + + https://www.intel.com/content/dam/support/us/en/documents/software/chipset-software/327432-004_espi_base_specification_rev1.0_cb.pdf + +config PLATFORM_EC_HOST_INTERFACE_HECI + bool "HECI" + depends on AP + help + Enable the Host Embedded Controller Interface (HECI). + + +config PLATFORM_EC_HOST_INTERFACE_LPC + bool "LPC" + depends on AP + help + Enable the Low-Pin-Count (LPC) bus. + +config PLATFORM_EC_HOST_INTERFACE_SHI + bool "SPI Host Interface" + depends on AP + help + Enable the SPI Host Interface (SHI). This is a traditional SPI (serial + peripheral interface), where the AP is the SPI controller and the EC + is the SPI peripheral. + +endchoice # PLATFORM_EC_HOST_INTERFACE_TYPE + +endif # PLATFORM_EC_HOSTCMD
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