From de55d8716ac50a356cea736c29bb7db5ac3d0190 Mon Sep 17 00:00:00 2001 From: MyungJoo Ham Date: Fri, 20 Apr 2012 14:16:22 +0900 Subject: Extcon (external connector): import Android's switch class and modify. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit External connector class (extcon) is based on and an extension of Android kernel's switch class located at linux/drivers/switch/. This patch provides the before-extension switch class moved to the location where the extcon will be located (linux/drivers/extcon/) and updates to handle class properly. The before-extension class, switch class of Android kernel, commits imported are: switch: switch class and GPIO drivers. (splitted) Author: Mike Lockwood switch: Use device_create instead of device_create_drvdata. Author: Arve Hjønnevåg In this patch, upon the commits of Android kernel, we have added: - Relocated and renamed for extcon. - Comments, module name, and author information are updated - Code clean for successing patches - Bugfix: enabling write access without write functions - Class/device/sysfs create/remove handling - Added comments about uevents - Format changes for extcon_dev_register() to have a parent dev. Signed-off-by: MyungJoo Ham Signed-off-by: Kyungmin Park Reviewed-by: Mark Brown -- Changes from v7 - Compiler error fixed when it is compiled as a module. - Removed out-of-date Kconfig entry Changes from v6 - Updated comment/strings - Revised "Android-compatible" mode. * Automatically activated if CONFIG_ANDROID && !CONFIG_ANDROID_SWITCH * Creates /sys/class/switch/*, which is a copy of /sys/class/extcon/* Changes from v5 - Split the patch - Style fixes - "Android-compatible" mode is enabled by Kconfig option. Changes from v2 - Updated name_show - Sysfs entries are handled by class itself. - Updated the method to add/remove devices for the class - Comments on uevent send - Able to become a module - Compatible with Android platform Changes from RFC - Renamed to extcon (external connector) from multistate switch - Added a seperated directory (drivers/extcon) - Added kerneldoc comments - Removed unused variables from extcon_gpio.c - Added ABI Documentation. Signed-off-by: Greg Kroah-Hartman --- drivers/extcon/Kconfig | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 drivers/extcon/Kconfig (limited to 'drivers/extcon/Kconfig') diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig new file mode 100644 index 0000000..7932e1b --- /dev/null +++ b/drivers/extcon/Kconfig @@ -0,0 +1,17 @@ +menuconfig EXTCON + tristate "External Connector Class (extcon) support" + help + Say Y here to enable external connector class (extcon) support. + This allows monitoring external connectors by userspace + via sysfs and uevent and supports external connectors with + multiple states; i.e., an extcon that may have multiple + cables attached. For example, an external connector of a device + may be used to connect an HDMI cable and a AC adaptor, and to + host USB ports. Many of 30-pin connectors including PDMI are + also good examples. + +if EXTCON + +comment "Extcon Device Drivers" + +endif # MULTISTATE_SWITCH -- cgit v1.1