[PATCH v6 23/25] usb: chipidea: Pullup D+ in device mode via phy APIs

[Stephen Boyd]

If the phy supports it, call phy_set_mode() to pull up D+ when
required by setting the mode to PHY_MODE_USB_DEVICE. If we want
to remove the pullup, set the mode to PHY_MODE_USB_HOST.

Cc: Peter Chen <peter.c...@nxp.com>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: Stephen Boyd <stephen.b...@linaro.org>
---
 drivers/usb/chipidea/udc.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 0d532a724d48..6d61fa0689b0 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -18,6 +18,7 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/pm_runtime.h>
+#include <linux/phy/phy.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 #include <linux/usb/otg-fsm.h>
@@ -1609,10 +1610,15 @@ static int ci_udc_pullup(struct usb_gadget *_gadget, 
int is_on)
                return 0;
 
        pm_runtime_get_sync(&ci->gadget.dev);
-       if (is_on)
+       if (is_on) {
+               if (ci->phy)
+                       phy_set_mode(ci->phy, PHY_MODE_USB_DEVICE);
                hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
-       else
+       } else {
                hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
+               if (ci->phy)
+                       phy_set_mode(ci->phy, PHY_MODE_USB_HOST);
+       }
        pm_runtime_put_sync(&ci->gadget.dev);
 
        return 0;
-- 
2.10.0.297.gf6727b0