[PATCH 0/5] phy: cpcap-usb: improve charger detection and export cable state

[Ivaylo Dimitrov]

The Motorola CPCAP USB PHY contains the hardware state machine used for
USB cable detection. Besides distinguishing USB peripheral and host
connections, it can also detect dedicated charging ports (DCP).

This series starts with a prerequisite fix from Tony Lindgren to prevent
spurious SysRq events when switching between USB and UART modes. It then
adds DCP detection support to the CPCAP USB PHY, updates the Device Tree
binding and corresponding mapphone Device Tree to use the charger
detection interrupt, and finally exports the detected cable state through
the Extcon framework.

The existing driver already interprets the CPCAP USB detection state
machine to determine the attached cable type. This series extends that
logic to distinguish DCP connections and exposes the detected cable state
through Extcon using a standard kernel interface. It also makes the idle
UART mode optional, allowing the PHY to remain in its default USB
detection configuration unless UART support is explicitly requested.

The series has been tested on Motorola Droid 4 hardware.

Ivaylo Dimitrov (4):
  phy: cpcap-usb: add DCP detection and make UART idle mode optional
  dt-bindings: phy: motorola,cpcap-usb: replace se1 interrupt with
    chrg_det
  ARM: dts: ti: cpcap-mapphone: use charger detection interrupt for
    CPCAP USB PHY
  phy: cpcap-usb: add extcon support

Tony Lindgren (1):
  phy: cpcap-usb: Prevent line glitches from triggering sysrq

 .../bindings/phy/motorola,cpcap-usb-phy.yaml  |   8 +-
 .../dts/ti/omap/motorola-cpcap-mapphone.dtsi  |   4 +-
 drivers/phy/motorola/phy-cpcap-usb.c          | 312 +++++++++++++++---
 3 files changed, 274 insertions(+), 50 deletions(-)

-- 
2.25.1