usb: dwc2: gadget: Set extcon state for usb cable as always true

To inform to userspace as enable usb features always, set extcon
state for usb cable as connected permanently. To enable this, add
"g-extcon-always-on" property on dt.

Change-Id: I687ca1b098d007a5d0ca7ddf6d552605195cafcf
Signed-off-by: Dongwoo Lee <dwoo08.lee@samsung.com>

diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index dfd7d4c9f0f4147bba71855830473ad079283f8b..b3e4c21323d86083522cf7c1ee3df4ad7bef9ff6 100644 (file)
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -872,6 +872,9 @@ struct dwc2_hsotg {
        u32 g_rx_fifo_sz;
        u32 g_np_g_tx_fifo_sz;
        u32 g_tx_fifo_sz[MAX_EPS_CHANNELS];
+#if IS_ENABLED(CONFIG_EXTCON)
+       bool g_extcon_always_on;
+#endif
 #endif /* CONFIG_USB_DWC2_PERIPHERAL || CONFIG_USB_DWC2_DUAL_ROLE */
 };
 

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 7b1428cd51a86f3bfd38ba54db2da413dc5ab806..856ba0603d1c41c8f387c10fb5fd786b2e059e0c 100644 (file)
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -26,6 +26,7 @@
 #include <linux/io.h>
 #include <linux/slab.h>
 #include <linux/of_platform.h>
+#include <linux/extcon.h>
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
@@ -3509,6 +3510,10 @@ static void dwc2_hsotg_of_probe(struct dwc2_hsotg *hsotg)
        /* Enable dma if requested in device tree */
        hsotg->g_using_dma = of_property_read_bool(np, "g-use-dma");
 
+#if IS_ENABLED(CONFIG_EXTCON)
+       hsotg->g_extcon_always_on =
+               of_property_read_bool(np, "g-extcon-always-on");
+#endif
        /*
        * Register TX periodic fifo size per endpoint.
        * EP0 is excluded since it has no fifo configuration.
@@ -3666,6 +3671,25 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
        }
        dwc2_hsotg_dump(hsotg);
 
+#if IS_ENABLED(CONFIG_EXTCON)
+       if (hsotg->g_extcon_always_on) {
+               struct extcon_dev *edev;
+               static const unsigned int supported_cable[] = {
+                       EXTCON_USB,
+                       EXTCON_NONE,
+               };
+
+               edev = devm_extcon_dev_allocate(dev, supported_cable);
+               if (IS_ERR(edev))
+                       return PTR_ERR(edev);
+
+               ret = devm_extcon_dev_register(dev, edev);
+               if (ret)
+                       return ret;
+
+               extcon_set_cable_state_(edev, EXTCON_USB, true);
+       }
+#endif
        return 0;
 }