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path: root/include/linux/extcon.h
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* extcon: Add devm_extcon_dev_allocate/free to manage the resource of extcon ↵Chanwoo Choi2014-04-291-0/+11
| | | | | | | | | | device This patch add device managed devm_extcon_dev_{allocate,free} to automatically free the memory of extcon_dev structure without handling free operation. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Reviewed-by: Felipe Balbi <balbi@ti.com>
* extcon: Add extcon_dev_allocate/free() to control the memory of extcon deviceChanwoo Choi2014-04-291-0/+13
| | | | | | | | | | | This patch add APIs to control the extcon device on extcon provider driver. The extcon_dev_allocate() allocates the memory of extcon device and initializes supported cables. And then extcon_dev_free() decrement the reference of the device of extcon device and free the memory of the extcon device. This APIs must need to implement devm_extcon_dev_allocate()/free() APIs. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Reviewed-by: Felipe Balbi <balbi@ti.com>
* extcon: Add resource-managed extcon register functionSangjung Woo2014-04-241-0/+13
| | | | | | | | | | | Add resource-managed extcon device register function for convenience. For example, if a extcon device is attached with new devm_extcon_dev_register(), that extcon device is automatically unregistered on driver detach. Signed-off-by: Sangjung Woo <sangjung.woo@samsung.com> [Fix bug about devm_extcon_dev_match/release() and code clean by Chanwoo Choi] Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: Move OF helper function to extcon core and change function nameChanwoo Choi2014-03-191-0/+12
| | | | | | | | | This patch move simply OF helper function to extcon core and change function name as following: - of_extcon_get_extcon_dev() -> extcon_get_edev_by_phandle() Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Felipe Balbi <balbi@ti.com>
* extcon: Simplify extcon_dev_register() prototype by removing unnecessary ↵Chanwoo Choi2013-09-271-3/+2
| | | | | | | | | | | | | | | | | parameter This patch remove extcon_dev_register()'s second parameter which means the pointer of parent device to simplify prototype of this function. So, if extcon device has the parent device, it should set the pointer of parent device to edev.dev.parent in extcon device driver instead of in extcon_dev_register(). Cc: Graeme Gregory <gg@slimlogic.co.uk> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Cc: Mark Brown <broonie@kernel.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
* extcon: Change field type of 'dev' in extcon_dev structureChanwoo Choi2013-09-271-2/+2
| | | | | | | | | The extcon device must always need 'struct device' so this patch change field type of 'dev' instead of allocating memory for 'struct device' on extcon_dev_register() function. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <cw00.choi@samsung.com>
* extcon: Fix indentation coding style to improve readabilityChanwoo Choi2013-09-271-32/+35
| | | | | Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
* extcon: kernel_doc style fixMyungJoo Ham2012-11-221-24/+24
| | | | | | Corrected kernel_doc entries. Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
* extcon: Add missing header file to extcon.hChanwoo Choi2012-11-201-0/+2
| | | | | | | | | This patch add missing header file(sysfs.h/device.h) to extcon.h because 'struct extcon_dev' define attribute field(attr_g_muex/ attrs_muex/d_attrs_mues) and device_type field(extcon_dev_type). Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
* extcon: standard cable names definition and declaration changedanish kumar2012-10-221-1/+1
| | | | | | | | | | | | | | With this change now individual drivers can use standard cable names as below: static const char *arizona_cable[] = { extcon_cable_name[EXTCON_USB], extcon_cable_name[EXTCON_USB_HOST], "CUSTOM_CABLE" NULL, } Signed-off-by: anish kumar <anish198519851985@gmail.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
* extcon: fixing typosPeter Meerwald2012-09-051-9/+9
| | | | | | Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* extcon: Add EXTCON_MECHANICAL cable type for physical presenceMark Brown2012-05-041-0/+1
| | | | | | | | | | | Some accessory detection mechanisms are able to detect that something is physically present in the socket separately to identifying what is present in the socket. This information can be useful to applications, for example allowing them to indicate that a potentially broken accessory is present, so provide a standard way to report it to userspace. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Extcon: support mutually exclusive relation between cables.MyungJoo Ham2012-04-201-5/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | There could be cables that t recannot be attaches simulatenously. Extcon device drivers may express such information via mutually_exclusive in struct extcon_dev. For example, for an extcon device with 16 cables (bits 0 to 15 are available), if mutually_exclusive = { 0x7, 0xC0, 0x81, 0 }, then, the following attachments are prohibitted. {0, 1} {0, 2} {1, 2} {6, 7} {0, 7} and every attachment set that are superset of one of the above. For the detail, please refer to linux/include/linux/extcon.h. The concept is suggested by NeilBrown <neilb@suse.de> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> -- Changes from V5: - Updated sysfs format Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Extcon: support multiple states at a device.MyungJoo Ham2012-04-201-0/+185
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | One switch device (e.g., MUIC(MAX8997, MAX77686, ...), and some 30-pin devices) may have multiple cables attached. For example, one 30-pin port may inhabit a USB cable, an HDMI cable, and a mic. Thus, one switch device requires multiple state bits each representing a type of cable. For such purpose, we use the 32bit state variable; thus, up to 32 different type of cables may be defined for a switch device. The list of possible cables is defined by the array of cable names in the switch_dev struct given to the class. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> -- Changes from V7 - Bugfixed in _call_per_cable() (incorrect nb) (Chanwoo Choi) - Compiler error in header for !CONFIG_EXTCON (Chanwoo Choi) Changes from V5 - Sysfs style reformed: subdirectory per cable. - Updated standard cable names - Removed unnecessary printf - Bugfixes after testing Changes from V4 - Bugfixes after more testing at Exynos4412 boards with userspace processses. Changes from V3 - Bugfixes after more testing at Exynos4412 boards. Changes from V2 - State can be stored by user - Documentation updated Changes from RFC - Switch is renamed to extcon - Added kerneldoc comments - Added APIs to support "standard" cable names - Added helper APIs to support notifier block registration with cable name. - Regrouped function list in the header file. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Extcon: support notification based on the state changes.Donggeun Kim2012-04-201-0/+38
| | | | | | | | | | | | | | | | | | | | | | State changes of extcon devices have been notified via kobjet_uevent. This patch adds notifier interfaces in order to allow device drivers to get notified easily. Along with notifier interface, extcon_get_extcon_dev() function is added so that device drivers may discover a extcon_dev easily. Signed-off-by: Donggeun Kim <dg77.kim@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> -- Changes from RFC - Renamed switch to extcon - Bugfix: extcon_dev_unregister() - Bugfix: "edev->dev" is "internal" data. - Added kerneldoc comments. - Reworded comments. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Extcon (external connector): import Android's switch class and modify.MyungJoo Ham2012-04-201-0/+82
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 <lockwood@android.com> switch: Use device_create instead of device_create_drvdata. Author: Arve Hjønnevåg <arve@android.com> 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 <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> -- 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 <gregkh@linuxfoundation.org>
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