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

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Date:   Wed, 28 Dec 2016 14:57:09 -0800
From:   Stephen Boyd <stephen.boyd@...aro.org>
To:     linux-usb@...r.kernel.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, Andy Gross <andy.gross@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Neil Armstrong <narmstrong@...libre.com>,
        Arnd Bergmann <arnd@...db.de>, Felipe Balbi <balbi@...nel.org>,
        Peter Chen <peter.chen@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH v6 23/25] usb: chipidea: Pullup D+ in device mode via phy APIs

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.chen@....com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Stephen Boyd <stephen.boyd@...aro.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