Hi, These patches add support for USB ID pin detection using extcon framework. The ID pin on DRA7xx is connected via the gpio expander pcf8575. The interrupt line of the same is connected to the gpio 11 of bank 6. The following driver relies on the gpio interrupt to notify the actual ID pin values by which the dwc3 driver determines the HOST/Peripheral roles. Optionally a polling method is also available if the gpio interrupts are not used on boards. These patches are on top of following merges. v3.11-rc3 dra7 baseport tree [1] , with balbi/next ,control-usb multi instance support [2], chanwoo/extcon-next, roger's patches for USB host adaptation[3] and Archit's patch to Enable pcf857x GPIO expander for Device Tree[4]. Patches are available at extcon_dra7xx-v2 in git tree git://git.ti.com/~georgecherian/ti-linux-kernel/georgec-connectivity-linux-feature-tree.git [1] - dra7 base tree https://github.com/lokeshvutla/linux/tree/dra7-3.11-rc3-base [2] - multiple control-usb instances https://github.com/rogerq/linux/tree/usb-control-module [3] - [PATCH 0/4] ARM: DRA7-evm: USB host adaptation https://lkml.org/lkml/2013/8/1/335 [4] - [PATCH] gpio: Enable pcf857x GPIO expander for Device Tree https://lkml.org/lkml/2013/6/6/333 George Cherian (2): extcon: extcon-dra7xx: Add extcon driver for USB ID detection arm: dts: dra7-evm: Add extcon dt nodes for USB ID detection .../devicetree/bindings/extcon/extcon-dra7xx.txt | 19 ++ arch/arm/boot/dts/dra7-evm.dts | 42 +++- drivers/extcon/Kconfig | 7 + drivers/extcon/Makefile | 1 + drivers/extcon/extcon-dra7xx.c | 234 +++++++++++++++++++++ 5 files changed, 302 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/extcon/extcon-dra7xx.txt create mode 100644 drivers/extcon/extcon-dra7xx.c -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
