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extcon: rt8973a: Add Richtek RT8973A extcon driver

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This patch add support for Richtek RT8973A which is Micro USB Switch OVP
and i2c interface. The RT8973A is a USB port accessory detector and switch
that is optimized to protect low voltage system from abnormal high input
voltage (up to 28V) and supports high speed USB operation. Also, RT8973A
support 'auto-configuration' mode. If auto-configuration mode is enabled,
RT8973A would control internal h/w patch for USB D-/D+ switching.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
This commit is contained in:
Chanwoo Choi
2014-08-18 09:05:21 +09:00
parent fbae30d8dd
commit c03e017c4d
4 changed files with 956 additions and 0 deletions
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12
drivers/extcon/Kconfig
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@@ -70,6 +70,18 @@ config EXTCON_PALMAS
Say Y here to enable support for USB peripheral and USB host
detection by palmas usb.
config EXTCON_RT8973A
tristate "RT8973A EXTCON support"
depends on I2C
select IRQ_DOMAIN
select REGMAP_I2C
select REGMAP_IRQ
help
If you say yes here you get support for the MUIC device of
Richtek RT8973A. The RT8973A is a USB port accessory detector
and switch that is optimized to protect low voltage system
from abnormal high input voltage (up to 28V).
config EXTCON_SM5502
tristate "SM5502 EXTCON support"
depends on I2C