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Commit 32890b98 authored by Marc Dietrich's avatar Marc Dietrich Committed by Greg Kroah-Hartman
Browse files

Staging: initial version of the nvec driver 



This is an implementation of a NVidia compliant embedded controller
protocol driver. It is used on some ARM-Tegra boards for device
communication.

Signed-off-by: default avatarMarc Dietrich <marvin24@gmx.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 23a42311

drivers/staging/Kconfig

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@@ -175,5 +175,7 @@ source "drivers/staging/altera-stapl/Kconfig" 


source "drivers/staging/mei/Kconfig"



source "drivers/staging/nvec/Kconfig"



endif # !STAGING_EXCLUDE_BUILD

endif # STAGING

drivers/staging/Makefile

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@@ -70,3 +70,4 @@ obj-$(CONFIG_TOUCHSCREEN_CLEARPAD_TM1217) += cptm1217/ 
obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4)	+= ste_rmi4/

obj-$(CONFIG_DRM_PSB)		+= gma500/

obj-$(CONFIG_INTEL_MEI)		+= mei/

obj-$(CONFIG_MFD_NVEC)		+= nvec/

drivers/staging/nvec/Kconfig

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config MFD_NVEC

	bool "NV Tegra Embedded Controller SMBus Interface"

	depends on I2C && GPIOLIB && ARCH_TEGRA

	help

	    Say Y here to enable support for a nVidia compliant embedded

	    controller.



config KEYBOARD_NVEC

	bool "Keyboard on nVidia compliant EC"

	depends on MFD_NVEC

	help

	  Say Y here to enable support for a keyboard connected to 

	  a nVidia compliant embedded controller.



config SERIO_NVEC_PS2

	bool "PS2 on nVidia EC"

	depends on MFD_NVEC

	help

	  Say Y here to enable support for a Touchpad / Mouse connected

	  to a nVidia compliant embedded controller.



config NVEC_POWER

	bool "NVEC charger and battery"

	depends on MFD_NVEC

	help

	  Say Y to enable support for battery and charger interface for

	  nVidia compliant embedded controllers.

drivers/staging/nvec/Makefile

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obj-$(CONFIG_SERIO_NVEC_PS2)	+= nvec_ps2.o

obj-$(CONFIG_MFD_NVEC)		+= nvec.o

obj-$(CONFIG_NVEC_POWER) 	+= nvec_power.o

obj-$(CONFIG_KEYBOARD_NVEC) 	+= nvec_kbd.o

drivers/staging/nvec/README

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NVEC: An NVidia compliant Embedded Controller Protocol Implemenation



This is an implementation of the NVEC protocol used to communicate with an

embedded controller (EC) via I2C bus. The EC is an I2C master while the host

processor is the I2C slave. Requests from the host processor to the EC are

started by triggering a gpio line.



There is no written documentation of the protocol available to the public,

but the source code[1] of the published nvec reference drivers can be a guide.

This driver is currently only used by the AC100 project[2], but it is likely,

that other Tegra boards (not yet mainlined, if ever) also use it.



[1] e.g. http://nv-tegra.nvidia.com/gitweb/?p=linux-2.6.git;a=tree;f=arch/arm/mach-tegra/nvec;hb=android-tegra-2.6.32

[2] http://gitorious.org/ac100, http://launchpad.net/ac100