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From: Roger Quadros <rogerq@ti.com>
To: <felipe.balbi@linux.intel.com>, <gregkh@linuxfoundation.org>
Cc: <pawell@cadence.com>, <peter.chen@nxp.com>, <nsekhar@ti.com>,
	<kurahul@cadence.com>, <linux-usb@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, Roger Quadros <rogerq@ti.com>
Subject: [PATCH] usb: cdns3: gadget: Don't manage pullups
Date: Wed, 23 Oct 2019 12:02:32 +0300	[thread overview]
Message-ID: <20191023090232.27237-1-rogerq@ti.com> (raw)

The USB gadget core is supposed to manage pullups
of the controller. Don't manage pullups from within
the controller driver. Otherwise, function drivers
are not able to keep the controller disconnected from
the bus till they are ready. (e.g. g_webcam)

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
Hi Greg/Felipe,

This can be used for -rc as it is a bug fix.

cheers,
-roger

 drivers/usb/cdns3/gadget.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
index 2ca280f4c054..714382d96055 100644
--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@ -2324,8 +2324,6 @@ static void cdns3_gadget_config(struct cdns3_device *priv_dev)
 	writel(USB_CONF_CLK2OFFDS | USB_CONF_L1DS, &regs->usb_conf);
 
 	cdns3_configure_dmult(priv_dev, NULL);
-
-	cdns3_gadget_pullup(&priv_dev->gadget, 1);
 }
 
 /**
@@ -2708,8 +2706,6 @@ static int cdns3_gadget_suspend(struct cdns3 *cdns, bool do_wakeup)
 	/* disable interrupt for device */
 	writel(0, &priv_dev->regs->usb_ien);
 
-	cdns3_gadget_pullup(&priv_dev->gadget, 0);
-
 	return 0;
 }
 
-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki


             reply	other threads:[~2019-10-23  9:02 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-23  9:02 Roger Quadros [this message]
2019-10-23  9:17 ` [PATCH] usb: cdns3: gadget: Don't manage pullups Pawel Laszczak
2019-10-25  3:13   ` Peter Chen
2019-10-25  9:59     ` Roger Quadros
2019-10-25 10:14       ` Felipe Balbi
2019-10-29  3:12       ` Peter Chen
2019-10-29  9:37         ` Roger Quadros
2019-10-29 10:33           ` Felipe Balbi
2019-10-30  1:15           ` Peter Chen

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