diff options
| author | Bryan O'Donoghue <bryan.odonoghue@linaro.org> | 2019-11-27 11:40:58 +0000 |
|---|---|---|
| committer | Bryan O'Donoghue <bryan.odonoghue@linaro.org> | 2019-12-11 10:47:58 +0000 |
| commit | d5ed583ba11d284a49d6869b099e664d007bd292 (patch) | |
| tree | b2f65c3745626f5401e349344d5eebd2036495d2 | |
| parent | a2392c269f6c9008e57c27576318b1ac7e9695b3 (diff) | |
usb: dwc3: Add support for usb-conn-gpio connectorsqcs404-usb-v4-for-upstream
This patch adds the ability to probe and enumerate a connector based on
usb-conn-gpio. A device node label gpio_usb_connector is used to identify
a usb-conn-gpio as a child of the USB interface.
You would use usb-conn-gpio when a regulator in your system provides VBUS
directly to the connector instead of supplying via the USB PHY.
The parent device must have the "usb-role-switch" property, so that when
the usb-conn-gpio driver calls usb_role_switch_set_role() the notification
in dwc3 will run and the block registers will be updated to match the state
detected at the connector.
Cc: John Stultz <john.stultz@linaro.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Jorge Ramirez-Ortiz <jorge.ramirez.ortiz@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
CC: ShuFan Lee <shufan_lee@richtek.com>
Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>
Cc: Yu Chen <chenyu56@huawei.com>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Jun Li <lijun.kernel@gmail.com>
Cc: Valentin Schneider <valentin.schneider@arm.com>
Cc: Jack Pham <jackp@codeaurora.org>
Cc: linux-usb@vger.kernel.org
Cc: devicetree@vger.kernel.org
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
| -rw-r--r-- | drivers/usb/dwc3/drd.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c index 865341facece..c6bb7cb809d5 100644 --- a/drivers/usb/dwc3/drd.c +++ b/drivers/usb/dwc3/drd.c @@ -11,6 +11,7 @@ #include <linux/of_graph.h> #include <linux/platform_device.h> #include <linux/property.h> +#include <linux/of_platform.h> #include "debug.h" #include "core.h" @@ -557,9 +558,32 @@ static int dwc3_setup_role_switch(struct dwc3 *dwc) dwc3_set_mode(dwc, mode); return 0; } + +static int dwc3_register_gpio_usb_connector(struct dwc3 *dwc) +{ + struct device *dev = dwc->dev; + struct device_node *np = dev->of_node, *con_np; + int ret; + + con_np = of_get_child_by_name(np, "gpio_usb_connector"); + if (!np) { + dev_dbg(dev, "no usb_connector child node specified\n"); + return 0; + } + + ret = of_platform_populate(np, NULL, NULL, dev); + if (ret) { + dev_err(dev, "failed to register usb_connector - %d\n", ret); + return ret; + } + + return 0; +} + #else #define ROLE_SWITCH 0 #define dwc3_setup_role_switch(x) 0 +#define dwc3_register_gpio_usb_connector(x) 0 #endif int dwc3_drd_init(struct dwc3 *dwc) @@ -575,6 +599,9 @@ int dwc3_drd_init(struct dwc3 *dwc) ret = dwc3_setup_role_switch(dwc); if (ret < 0) return ret; + ret = dwc3_register_gpio_usb_connector(dwc); + if (ret < 0) + return ret; } else if (dwc->edev) { dwc->edev_nb.notifier_call = dwc3_drd_notifier; ret = extcon_register_notifier(dwc->edev, EXTCON_USB_HOST, |