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This driver implements a slim layer to enable the ChromeOS EC kernel stack (cros_ec) to communicate with ChromeOS EC firmware running on the Intel Integrated Sensor Hub (ISH). The driver registers a ChromeOS EC MFD device to connect with cros_ec kernel stack (upper layer), and it registers a client with the ISH Transport Protocol bus (lower layer) to talk with the ISH firwmare. See description of the ISHTP protocol at Documentation/hid/intel-ish-hid.txt Signed-off-by: Rushikesh S Kadam <rushikesh.s.kadam@intel.com> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reviewed-by: Jett Rink <jettrink@chromium.org> Tested-by: Jett Rink <jettrink@chromium.org> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
195 lines
6.1 KiB
Plaintext
195 lines
6.1 KiB
Plaintext
#
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# Platform support for Chrome OS hardware (Chromebooks and Chromeboxes)
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#
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menuconfig CHROME_PLATFORMS
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bool "Platform support for Chrome hardware"
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depends on X86 || ARM || ARM64 || COMPILE_TEST
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---help---
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Say Y here to get to see options for platform support for
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various Chromebooks and Chromeboxes. This option alone does
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not add any kernel code.
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If you say N, all options in this submenu will be skipped and disabled.
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if CHROME_PLATFORMS
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config CHROMEOS_LAPTOP
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tristate "Chrome OS Laptop"
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depends on I2C && DMI && X86
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---help---
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This driver instantiates i2c and smbus devices such as
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light sensors and touchpads.
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If you have a supported Chromebook, choose Y or M here.
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The module will be called chromeos_laptop.
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config CHROMEOS_PSTORE
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tristate "Chrome OS pstore support"
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depends on X86
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---help---
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This module instantiates the persistent storage on x86 ChromeOS
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devices. It can be used to store away console logs and crash
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information across reboots.
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The range of memory used is 0xf00000-0x1000000, traditionally
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the memory used to back VGA controller memory.
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If you have a supported Chromebook, choose Y or M here.
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The module will be called chromeos_pstore.
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config CHROMEOS_TBMC
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tristate "ChromeOS Tablet Switch Controller"
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depends on ACPI
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depends on INPUT
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help
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This option adds a driver for the tablet switch on
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select Chrome OS systems.
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To compile this driver as a module, choose M here: the
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module will be called chromeos_tbmc.
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config CROS_EC_I2C
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tristate "ChromeOS Embedded Controller (I2C)"
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depends on MFD_CROS_EC && I2C
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help
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If you say Y here, you get support for talking to the ChromeOS
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EC through an I2C bus. This uses a simple byte-level protocol with
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a checksum. Failing accesses will be retried three times to
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improve reliability.
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config CROS_EC_RPMSG
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tristate "ChromeOS Embedded Controller (rpmsg)"
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depends on MFD_CROS_EC && RPMSG && OF
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help
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If you say Y here, you get support for talking to the ChromeOS EC
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through rpmsg. This uses a simple byte-level protocol with a
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checksum. Also since there's no addition EC-to-host interrupt, this
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use a byte in message to distinguish host event from host command.
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To compile this driver as a module, choose M here: the
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module will be called cros_ec_rpmsg.
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config CROS_EC_ISHTP
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tristate "ChromeOS Embedded Controller (ISHTP)"
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depends on MFD_CROS_EC
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depends on INTEL_ISH_HID
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help
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If you say Y here, you get support for talking to the ChromeOS EC
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firmware running on Intel Integrated Sensor Hub (ISH), using the
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ISH Transport protocol (ISH-TP). This uses a simple byte-level
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protocol with a checksum.
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To compile this driver as a module, choose M here: the
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module will be called cros_ec_ishtp.
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config CROS_EC_SPI
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tristate "ChromeOS Embedded Controller (SPI)"
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depends on MFD_CROS_EC && SPI
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---help---
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If you say Y here, you get support for talking to the ChromeOS EC
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through a SPI bus, using a byte-level protocol. Since the EC's
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response time cannot be guaranteed, we support ignoring
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'pre-amble' bytes before the response actually starts.
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config CROS_EC_LPC
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tristate "ChromeOS Embedded Controller (LPC)"
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depends on MFD_CROS_EC && ACPI && (X86 || COMPILE_TEST)
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help
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If you say Y here, you get support for talking to the ChromeOS EC
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over an LPC bus. This uses a simple byte-level protocol with a
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checksum. This is used for userspace access only. The kernel
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typically has its own communication methods.
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To compile this driver as a module, choose M here: the
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module will be called cros_ec_lpc.
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config CROS_EC_LPC_MEC
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bool "ChromeOS Embedded Controller LPC Microchip EC (MEC) variant"
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depends on CROS_EC_LPC
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default n
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help
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If you say Y here, a variant LPC protocol for the Microchip EC
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will be used. Note that this variant is not backward compatible
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with non-Microchip ECs.
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If you have a ChromeOS Embedded Controller Microchip EC variant
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choose Y here.
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config CROS_EC_PROTO
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bool
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help
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ChromeOS EC communication protocol helpers.
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config CROS_KBD_LED_BACKLIGHT
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tristate "Backlight LED support for Chrome OS keyboards"
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depends on LEDS_CLASS && ACPI
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help
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This option enables support for the keyboard backlight LEDs on
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select Chrome OS systems.
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To compile this driver as a module, choose M here: the
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module will be called cros_kbd_led_backlight.
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config CROS_EC_LIGHTBAR
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tristate "Chromebook Pixel's lightbar support"
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depends on MFD_CROS_EC_CHARDEV
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default MFD_CROS_EC_CHARDEV
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help
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This option exposes the Chromebook Pixel's lightbar to
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userspace.
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To compile this driver as a module, choose M here: the
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module will be called cros_ec_lightbar.
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config CROS_EC_VBC
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tristate "ChromeOS EC vboot context support"
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depends on MFD_CROS_EC_CHARDEV && OF
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default MFD_CROS_EC_CHARDEV
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help
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This option exposes the ChromeOS EC vboot context nvram to
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userspace.
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To compile this driver as a module, choose M here: the
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module will be called cros_ec_vbc.
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config CROS_EC_DEBUGFS
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tristate "Export ChromeOS EC internals in DebugFS"
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depends on MFD_CROS_EC_CHARDEV && DEBUG_FS
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default MFD_CROS_EC_CHARDEV
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help
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This option exposes the ChromeOS EC device internals to
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userspace.
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To compile this driver as a module, choose M here: the
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module will be called cros_ec_debugfs.
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config CROS_EC_SYSFS
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tristate "ChromeOS EC control and information through sysfs"
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depends on MFD_CROS_EC_CHARDEV && SYSFS
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default MFD_CROS_EC_CHARDEV
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help
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This option exposes some sysfs attributes to control and get
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information from ChromeOS EC.
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To compile this driver as a module, choose M here: the
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module will be called cros_ec_sysfs.
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config CROS_USBPD_LOGGER
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tristate "Logging driver for USB PD charger"
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depends on CHARGER_CROS_USBPD
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default y
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select RTC_LIB
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help
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This option enables support for logging event data for the USB PD charger
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available in the Embedded Controller on ChromeOS systems.
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To compile this driver as a module, choose M here: the
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module will be called cros_usbpd_logger.
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source "drivers/platform/chrome/wilco_ec/Kconfig"
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endif # CHROMEOS_PLATFORMS
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