4 Commits

Author SHA1 Message Date
Paul Cercueil
e3ee0e740c usb: common: usb-conn-gpio: Register charger
Register a power supply charger, whose online state depends on whether
the USB role is set to device or not.

This is useful when the USB role is the only way to know if the device
is charging from USB. The API is the standard power supply charger API,
you get a /sys/class/power_supply/xxx/online node which tells you the
state of the charger.

The sole purpose of this is to give userspace applications a way to
know whether or not the charger is plugged.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20200727170413.23131-1-paul@crapouillou.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-30 08:45:24 +02:00
Lee Jones
11d96a5912 usb: common: usb-conn-gpio: Demote comment block which is clearly not kerneldoc
This block lacks a title and argument descriptions.

Fixes the following W=1 kernel build warning:

 drivers/usb/common/usb-conn-gpio.c:44: warning: Cannot understand  * "DEVICE" = VBUS and "HOST" = !ID, so we have:
 on line 44 - I thought it was a doc line

Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200702144625.2533530-5-lee.jones@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-03 09:34:11 +02:00
Bryan O'Donoghue
59120962e4 usb: common: usb-conn-gpio: Don't log an error on probe deferral
This patch makes the printout of the error message for failing to get a
VBUS regulator handle conditional on the error code being something other
than -EPROBE_DEFER.

Deferral is a normal thing, we don't need an error message for this.

Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>
Cc: Nagarjuna Kristam <nkristam@nvidia.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191128134358.3880498-2-bryan.odonoghue@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-10 11:41:20 +01:00
Chunfeng Yun
4602f3bff2 usb: common: add USB GPIO based connection detection driver
Due to the requirement of usb-connector.txt binding, the old way
using extcon to support USB Dual-Role switch is now deprecated
when use Type-B connector.
This patch introduces a USB GPIO based connection detection driver,
used to support Type-B connector which typically uses an input GPIO
to detect USB ID pin, and try to replace the function provided
by the extcon-usb-gpio driver

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Tested-by: Nagarjuna Kristam <nkristam@nvidia.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/1567070558-29417-11-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-03 19:01:04 +02:00