linux-toradex.git/drivers/extcon/extcon.c, branch v4.9.16

extcon: return error code on failure

2017-01-19T19:18:03+00:00

commit 5b11ebedd6a8bb4271b796e498cd15c0fe1133b6 upstream.

Function get_zeroed_page() returns a NULL pointer if there is no enough
memory. In function extcon_sync(), it returns 0 if the call to
get_zeroed_page() fails. The return value 0 indicates success in the
context, which is incosistent with the execution status. This patch
fixes the bug by returning -ENOMEM.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=188611

Signed-off-by: Pan Bian 
Fixes: a580982f0836e
Acked-by: Chanwoo Choi 
Signed-off-by: Greg Kroah-Hartman

extcon: Add new EXTCON_CHG_WPT for Wireless Power Transfer device

2016-08-08T02:17:23+00:00

This patchs add the new EXTCON_CHG_WPT for Wireless Power Transfer[1].
The Wireless Power Transfer is the transmission of electronical energy
from a power source. The EXTCON_CHG_WPT has the EXTCON_TYPE_CHG.

[1] https://en.wikipedia.org/wiki/Wireless_power_transfer

Signed-off-by: Chanwoo Choi

extcon: Add new EXTCON_DISP_HMD for Head-mounted Display device

2016-08-08T02:17:23+00:00

This patch adds the new EXTCON_DISP_HMD id for Head-mounted Display[1] device.
The HMD device is usually for USB connector type So, the HMD connector
has the two extcon types of both EXTCON_TYPE_DISP and EXTCON_TYPE_USB.

[1] https://en.wikipedia.org/wiki/Head-mounted_display

Signed-off-by: Chanwoo Choi

extcon: Add EXTCON_DISP_DP and the property for USB Type-C

2016-08-08T02:17:23+00:00

Add EXTCON_DISP_DP for the Display external connector. For Type-C
connector the DisplayPort can work as an Alternate Mode(VESA DisplayPort
Alt Mode on USB Type-C Standard). The Type-C support both normal
and flipped orientation, so add a property to extcon.

Signed-off-by: Chris Zhong 
Signed-off-by: Chanwoo Choi 
Tested-by: Chris Zhong 
Tested-by: Guenter Roeck 
Reviewed-by: Guenter Roeck

extcon: Add the synchronization extcon APIs to support the notification

2016-08-08T02:17:22+00:00

This patch adds the synchronization extcon APIs to support the notifications
for both state and property. When extcon_*_sync() functions is called,
the extcon informs the information from extcon provider to extcon client.

The extcon driver may need to change the both state and multiple properties
at the same time. After setting the data of a external connector,
the extcon send the notification to client driver with the extcon_*_sync().

The list of new extcon APIs as following:
- extcon_sync() : Send the notification for each external connector to
		synchronize the information between extcon provider driver
		and extcon client driver.
- extcon_set_state_sync() : Set the state of external connector with noti.
- extcon_set_property_sync() : Set the property of external connector with noti.

For example,
case 1, change the state of external connector and synchronized the data.
	extcon_set_state_sync(edev, EXTCON_USB, 1);

case 2, change both the state and property of external connector
	and synchronized the data.
	extcon_set_state(edev, EXTCON_USB, 1);
	extcon_set_property(edev, EXTCON_USB, EXTCON_PROP_USB_VBUS 1);
	extcon_sync(edev, EXTCON_USB);

case 3, change the property of external connector and synchronized the data.
	extcon_set_property(edev, EXTCON_USB, EXTCON_PROP_USB_VBUS, 0);
	extcon_sync(edev, EXTCON_USB);

case 4, change the property of external connector and synchronized the data.
	extcon_set_property_sync(edev, EXTCON_USB, EXTCON_PROP_USB_VBUS, 0);

Signed-off-by: Chanwoo Choi 
Tested-by: Chris Zhong 
Tested-by: Guenter Roeck 
Reviewed-by: Guenter Roeck

extcon: Rename the extcon_set/get_state() to maintain the function naming pattern

2016-08-08T02:17:22+00:00

This patch just renames the existing extcon_get/set_cable_state_()
as following because of maintaining the function naming pattern
like as extcon APIs for property.
- extcon_set_cable_state_() -> extcon_set_state()
- extcon_get_cable_state_() -> extcon_get_state()

But, this patch remains the old extcon_set/get_cable_state_() functions
to prevent the build break. After altering new APIs, remove the old APIs.

Signed-off-by: Chanwoo Choi 
Tested-by: Chris Zhong 
Tested-by: Guenter Roeck 
Reviewed-by: Guenter Roeck

extcon: Add the support for the capability of each property

2016-08-08T02:17:22+00:00

This patch adds the support of the property capability setting. This function
decides the supported properties of each external connector on extcon provider
driver.

Ths list of new extcon APIs to get/set the capability of property as following:
- int extcon_get_property_capability(struct extcon_dev *edev,
					unsigned int id, unsigned int prop);
- int extcon_set_property_capability(struct extcon_dev *edev,
					unsigned int id, unsigned int prop);

Signed-off-by: Chanwoo Choi 
Tested-by: Chris Zhong 
Tested-by: Guenter Roeck 
Reviewed-by: Guenter Roeck

extcon: Add the support for extcon property according to extcon type

2016-08-08T02:17:22+00:00

This patch support the extcon property for the external connector
because each external connector might have the property according to
the H/W design and the specific characteristics.

- EXTCON_PROP_USB_[property name]
- EXTCON_PROP_CHG_[property name]
- EXTCON_PROP_JACK_[property name]
- EXTCON_PROP_DISP_[property name]

Add the new extcon APIs to get/set the property value as following:
- int extcon_get_property(struct extcon_dev *edev, unsigned int id,
			unsigned int prop,
			union extcon_property_value *prop_val)
- int extcon_set_property(struct extcon_dev *edev, unsigned int id,
			unsigned int prop,
			union extcon_property_value prop_val)

Signed-off-by: Chanwoo Choi 
Tested-by: Chris Zhong 
Tested-by: Guenter Roeck 
Reviewed-by: Guenter Roeck

extcon: Add the extcon_type to gather each connector into five category

2016-08-08T02:17:20+00:00

This patch adds the new extcon type to group the each connecotr
into following five category. This type would be used to handle
the connectors as a group unit instead of a connector unit.
- EXTCON_TYPE_USB  : USB connector
- EXTCON_TYPE_CHG  : Charger connector
- EXTCON_TYPE_JACK : Jack connector
- EXTCON_TYPE_DISP : Display connector
- EXTCON_TYPE_MISC : Miscellaneous connector

Also, each external connector is possible to belong to one more extcon type.
In caes of EXTCON_CHG_USB_SDP, it have the EXTCON_TYPE_CHG and EXTCON_TYPE_USB.

Signed-off-by: Chanwoo Choi 
Tested-by: Chris Zhong 
Tested-by: Guenter Roeck 
Signed-off-by: MyungJoo Ham 
Reviewed-by: Guenter Roeck

extcon: Fix compile time warning

2016-08-08T01:58:37+00:00

This patch fixes below compilation warning:-
drivers/extcon/extcon.c: In function extcon_register_notifier:
drivers/extcon/extcon.c:455:6: warning: idx may be used uninitialized in this function [-Wmaybe-uninitialized]
   if (idx >= 0) {

Signed-off-by: Vaneet Narang 
Signed-off-by: Maninder Singh 
[cw00.choi : Modify the patch title using the a captical letter for first char]
Signed-off-by: Chanwoo Choi