From ec2f33ab582bf6bb14ef3e1ce4ed5f1973edd9f6 Mon Sep 17 00:00:00 2001 From: Bill Richardson Date: Mon, 2 Feb 2015 12:26:24 +0100 Subject: platform/chrome: Add cros_ec_lpc driver for x86 devices Chromebooks have an Embedded Controller (EC) that is used to implement various functions such as keyboard, power and battery. The AP can communicate with the EC through different bus types such as I2C, SPI or LPC. The cros_ec mfd driver is then composed of a core driver that register the sub-devices as mfd cells and provide a high level communication interface that is used by the rest of the kernel and bus specific interfaces modules. Each connection method then has its own driver, which register with the EC driver interface-agnostic interface. Currently, there are drivers to communicate with the EC over I2C and SPI and this driver adds support for LPC. Signed-off-by: Bill Richardson Signed-off-by: Javier Martinez Canillas Tested-by: Gwendal Grignou Reviewed-by: Gwendal Grignou Signed-off-by: Olof Johansson --- drivers/platform/chrome/Kconfig | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/platform/chrome/Kconfig') diff --git a/drivers/platform/chrome/Kconfig b/drivers/platform/chrome/Kconfig index 440ed776efd4..6c5f5a1e1175 100644 --- a/drivers/platform/chrome/Kconfig +++ b/drivers/platform/chrome/Kconfig @@ -39,4 +39,16 @@ config CHROMEOS_PSTORE The module will be called chromeos_pstore. +config CROS_EC_LPC + tristate "ChromeOS Embedded Controller (LPC)" + depends on MFD_CROS_EC + help + If you say Y here, you get support for talking to the ChromeOS EC + over an LPC bus. This uses a simple byte-level protocol with a + checksum. This is used for userspace access only. The kernel + typically has its own communication methods. + + To compile this driver as a module, choose M here: the + module will be called cros_ec_lpc. + endif # CHROMEOS_PLATFORMS -- cgit v1.2.3-59-g8ed1b