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path: root/drivers/extcon/extcon-usb-gpio.c
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* extcon: Split out extcon header file for consumer and provider deviceChanwoo Choi2017-10-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The extcon has two type of extcon devices as following. - 'extcon provider deivce' adds new extcon device and detect the state/properties of external connector. Also, it notifies the state/properties to the extcon consumer device. - 'extcon consumer device' gets the change state/properties from extcon provider device. Prior to that, include/linux/extcon.h contains all exported API for both provider and consumer device driver. To clarify the meaning of header file and to remove the wrong use-case on consumer device, this patch separates into extcon.h and extcon-provider.h. [Description for include/linux/{extcon.h|extcon-provider.h}] - extcon.h includes the extcon API and data structure for extcon consumer device driver. This header file contains the following APIs: : Register/unregister the notifier to catch the change of extcon device : Get the extcon device instance : Get the extcon device name : Get the state of each external connector : Get the property value of each external connector : Get the property capability of each external connector - extcon-provider.h includes the extcon API and data structure for extcon provider device driver. This header file contains the following APIs: : Include 'include/linux/extcon.h' : Allocate the memory for extcon device instance : Register/unregister extcon device : Set the state of each external connector : Set the property value of each external connector : Set the property capability of each external connector Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Acked-by: Chen-Yu Tsai <wens@csie.org> Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
* extcon: usb-gpio: Don't miss event during suspend/resumeRoger Quadros2017-04-061-3/+2
| | | | | | | | | | | We must check for ID/VBUS changes during resume irrespective of whether our device wakeup is enabled or not. Without this we seem to be missing ID/VBUS events after system suspend/resume. Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: usb-gpio: Do not enable USB as wakeup source by defaultPeter Chen2017-04-061-1/+1
| | | | | | | | Whether the USB port as a wakeup source should be determined by user, but not enabled by default. Signed-off-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* Revert "extcon: usb-gpio: add support for ACPI gpio interface"Andy Shevchenko2017-03-271-2/+1
| | | | | | | | | | | | The commit 942c7924a51e introduced a check for ACPI handle for the device that never appears on any ACPI-enabled platform so far. It seems a confusion with extcon-intel-int3496 which does support ACPI-enabled platforms. Revert commit 942c7924a51e to avoid any confusion in the future. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: usb-gpio: Add pinctrl operation during system PMPeter Chen2017-01-091-0/+7
| | | | | | | | | | | At some systems, the pinctrl setting will be lost or needs to set as "sleep" state to save power consumption. So, we need to configure pinctrl as "sleep" state when system enters suspend, and as "default" state after system resumes. In this way, the pinctrl value can be recovered as "default" state after resuming. Signed-off-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: usb-gpio: Add VBUS detection supportRoger Quadros2016-11-201-40/+129
| | | | | | | | | | | | | | | | | | | | | | | | | | Driver can now work with both ID and VBUS pins or either one of them. There can be the following 3 cases 1) Both ID and VBUS GPIOs are available: ID = LOW -> USB_HOST active, USB inactive ID = HIGH -> USB_HOST inactive, USB state is same as VBUS. 2) Only ID GPIO is available: ID = LOW -> USB_HOST active, USB inactive ID = HIGH -> USB_HOST inactive, USB active 3) Only VBUS GPIO is available: VBUS = LOW -> USB_HOST inactive, USB inactive VBUS = HIGH -> USB_HOST inactive, USB active Signed-off-by: Roger Quadros <rogerq@ti.com> Reviewed-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: Use the extcon_set_state_sync() instead of deprecated functionsChanwoo Choi2016-09-131-4/+4
| | | | | | | | | | | | | | | | | This patch alters the renamed extcon API to set the state of the external connectors instead of deprecated extcon_set_cable_state_(). Because the patch[1] modifies the function name to maintain the function naming pattern. - extcon_set_cable_state_() -> extcon_set_state_sync() - extcon_get_cable_state_() -> extcon_get_state() [1] https://lkml.org/lkml/2016/8/4/729 - extcon: Rename the extcon_set/get_state() to maintain the function naming pattern Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Roger Quadros <rogerq@ti.com>
* extcon: usb-gpio: add support for ACPI gpio interfaceLu Baolu2016-06-211-1/+2
| | | | | | | | | GPIO resource could be retrieved through APCI as well. Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Felipe Balbi <balbi@kernel.org> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: usb-gpio: add device binding for platform deviceLu Baolu2016-06-211-0/+7
| | | | | | | | | | This is needed to handle the GPIO connected USB ID pin found on Intel Baytrail devices. Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Felipe Balbi <balbi@kernel.org> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: usb-gpio: Don't miss event during suspend/resumeRoger Quadros2016-06-211-0/+3
| | | | | | | | | | Pin state might have changed during suspend/resume while our interrupts were disabled and if device doesn't support wakeup. Scan for change during resume for such case. Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: usb-gpio: switch to use pm wakeirq apisGrygorii Strashko2016-06-211-13/+6
| | | | | | | | | | Switch to use PM wakeirq APIs which automates wakeup IRQs enabling/disabling and so allows to make code simpler. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: palmas: Support GPIO based USB ID detectionRoger Quadros2015-08-101-0/+1
| | | | | | | | | | | | | Some palmas based chip variants do not have OTG based ID logic. For these variants we rely on GPIO based USB ID detection. These chips do have VBUS comparator for VBUS detection so we continue to use the old way of detecting VBUS. Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: Redefine the unique id of supported external connectors without ↵Chanwoo Choi2015-06-121-1/+1
| | | | | | | | | | | | | | | 'enum extcon' type This patch just redefine the unique id of supported external connectors without 'enum extcon' type. Because unique id would be used on devictree file(*.dts) to indicate the specific external connectors like key number of input framework. So, I have the plan to move this definitions to following header file which includes the unique id of supported external connectors. - include/dt-bindings/extcon/extcon.h Fixes: 2a9de9c0f08d ("extcon: Use the unique id for external connector instead of string") Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* extcon: Use the unique id for external connector instead of stringChanwoo Choi2015-05-221-24/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch uses the unique id to identify the type of external connector instead of string name. The string name have the many potential issues. So, this patch defines the 'extcon' enumeration which includes all supported external connector on EXTCON subsystem. If new external connector is necessary, the unique id of new connector have to be added in 'extcon' enumeration. There are current supported external connector in 'enum extcon' as following: enum extcon { EXTCON_NONE = 0x0, /* USB external connector */ EXTCON_USB = 0x1, EXTCON_USB_HOST = 0x2, /* Charger external connector */ EXTCON_TA = 0x10, EXTCON_FAST_CHARGER = 0x11, EXTCON_SLOW_CHARGER = 0x12, EXTCON_CHARGE_DOWNSTREAM = 0x13, /* Audio and video external connector */ EXTCON_LINE_IN = 0x20, EXTCON_LINE_OUT = 0x21, EXTCON_MICROPHONE = 0x22, EXTCON_HEADPHONE = 0x23, EXTCON_HDMI = 0x30, EXTCON_MHL = 0x31, EXTCON_DVI = 0x32, EXTCON_VGA = 0x33, EXTCON_SPDIF_IN = 0x34, EXTCON_SPDIF_OUT = 0x35, EXTCON_VIDEO_IN = 0x36, EXTCON_VIDEO_OUT = 0x37, /* Miscellaneous external connector */ EXTCON_DOCK = 0x50, EXTCON_JIG = 0x51, EXTCON_MECHANICAL = 0x52, EXTCON_END, }; For example in extcon-arizona.c: To use unique id removes the potential issue about handling the inconsistent name of external connector with string. - Previously, use the string to register the type of arizona jack connector static const char *arizona_cable[] = { "Mechanical", "Microphone", "Headphone", "Line-out", }; - Newly, use the unique id to register the type of arizona jack connector static const enum extcon arizona_cable[] = { EXTCON_MECHANICAL, EXTCON_MICROPHONE, EXTCON_HEADPHONE, EXTCON_LINE_OUT, EXTCON_NONE, }; And this patch modify the prototype of extcon_{get|set}_cable_state_() which uses the 'enum extcon id' instead of 'cable_index'. Because although one more extcon drivers support USB cable, each extcon driver might has the differnt 'cable_index' for USB cable. All extcon drivers can use the unique id number for same external connector with modified extcon_{get|set}_cable_state_(). - Previously, use 'cable_index' on these functions: extcon_get_cable_state_(struct extcon_dev*, int cable_index) extcon_set_cable_state_(struct extcon_dev*, int cable_index, bool state) -Newly, use 'enum extcon id' on these functions: extcon_get_cable_state_(struct extcon_dev*, enum extcon id) extcon_set_cable_state_(struct extcon_dev*, enum extcon id, bool state) Cc: Arnd Bergmann <arnd@arndb.de> Cc: Felipe Balbi <balbi@ti.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Roger Quadros <rogerq@ti.com> Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> [arnd: Report the build break about drivers/usb/phy/phy-tahvo.c after using the unique id for external connector insteadf of string] Reported-by: Arnd Bergmann <arnd@arndb.de> [dan.carpenter: Report the build warning of extcon_{set|get}_cable_state_()] Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
* extcon: usb-gpio: use flags argument of devm_gpiod_get to set directionUwe Kleine-König2015-05-201-1/+1
| | | | | | | | | | | | | Since 39b2bbe3d715 (gpio: add flags argument to gpiod_get*() functions) which appeared in v3.17-rc1, the gpiod_get* functions take an additional parameter that allows to specify direction and initial value for output. Without this patch there is no call to gpiod_direction_input but the gpio is used for irq reporting and for that the line should be in input mode. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: Allow compile test of GPIO consumers if !GPIOLIBGeert Uytterhoeven2015-05-191-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | The GPIO subsystem provides dummy GPIO consumer functions if GPIOLIB is not enabled. Hence drivers that depend on GPIOLIB, but use GPIO consumer functionality only, can still be compiled if GPIOLIB is not enabled. Relax the dependency on GPIOLIB if COMPILE_TEST is enabled, where appropriate. If GPIOLIB=n and asm-generic/gpio.h is not used: drivers/extcon/extcon-usb-gpio.c: In function ‘usb_extcon_detect_cable’: drivers/extcon/extcon-usb-gpio.c:63: error: implicit declaration of function ‘gpiod_get_value_cansleep’ drivers/extcon/extcon-usb-gpio.c: In function ‘usb_extcon_probe’: drivers/extcon/extcon-usb-gpio.c:116: error: implicit declaration of function ‘devm_gpiod_get’ drivers/extcon/extcon-usb-gpio.c:116: warning: assignment makes pointer from integer without a cast drivers/extcon/extcon-usb-gpio.c:122: error: implicit declaration of function ‘gpiod_set_debounce’ drivers/extcon/extcon-usb-gpio.c:129: error: implicit declaration of function ‘gpiod_to_irq’ Add the missing #include <linux/gpio/consumer.h> to fix this. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: usb-gpio: register extcon device before IRQ registrationRobert Baldyga2015-04-271-12/+12
| | | | | | | | | | IRQ handler touches info->edev, so if interrupt occurs before extcon device initialization it can cause NULL pointer dereference. Doing extcon initialization before IRQ handler registration fixes this problem. Signed-off-by: Robert Baldyga <r.baldyga@samsung.com> Acked-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: Fix the checkpatch warningChanwoo Choi2015-03-071-1/+1
| | | | | | This patch fixes the checkpatch warning about coding style. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
* extcon: usb-gpio: Introduce gpio usb extcon driverRoger Quadros2015-02-241-0/+237
This driver observes the USB ID pin connected over a GPIO and updates the USB cable extcon states accordingly. The existing GPIO extcon driver is not suitable for this purpose as it needs to be taught to understand USB cable states and it can't handle more than one cable per instance. For the USB case we need to handle 2 cable states. 1) USB (attach/detach) 2) USB-HOST (attach/detach) This driver can be easily updated in the future to handle VBUS events in case it happens to be available on GPIO for any platform. Signed-off-by: Roger Quadros <rogerq@ti.com> Reviewed-by: Felipe Balbi <balbi@ti.com> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
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