From: Felipe Balbi <balbi@kernel.org>
To: Roger Quadros <rogerq@ti.com>
Cc: tony@atomide.com, Joao.Pinto@synopsys.com,
sergei.shtylyov@cogentembedded.com, peter.chen@freescale.com,
jun.li@freescale.com, grygorii.strashko@ti.com,
yoshihiro.shimoda.uh@renesas.com, nsekhar@ti.com, b-liu@ti.com,
linux-usb@vger.kernel.org, linux-omap@vger.kernel.org,
linux-kernel@vger.kernel.org, Roger Quadros <rogerq@ti.com>
Subject: Re: [PATCH v7 3/5] usb: dwc3: omap: Don't set POWERPRESENT
Date: Tue, 10 May 2016 12:54:11 +0300 [thread overview]
Message-ID: <87futqi6gs.fsf@linux.intel.com> (raw)
In-Reply-To: <1462873919-20532-4-git-send-email-rogerq@ti.com>
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Hi,
Roger Quadros <rogerq@ti.com> writes:
> TRM [1] recommends that POWERPRESENT bit must not be
> set and left at it's default value of 0.
>
> [1] OMAP542x TRM - http://www.ti.com/lit/pdf/swpu249
> Section 23.11.4.5.1 Mailbox VBUS/ID Management
>
> "Because PIPE powerpresent has a different meaning in host and in device mode,
> and because of the redundancy with the UTMI signals, the controller ORes
> together the appropriate PIPE and UTMI inputs to create its internal
> VBUS status. For that reason, it is recommended to leave field
> USBOTGSS_UTMI_OTG_STATUS[9] POWERPRESENT at its default value (=0), and only to
> fill in the USB2 VBUS status fields in the same register."
>
> Signed-off-by: Roger Quadros <rogerq@ti.com>
to make sure we avoid regressions, do you mind sharing on which
platforms you tested this patch ?
--
balbi
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next prev parent reply other threads:[~2016-05-10 9:56 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-10 9:51 [PATCH v7 0/5] dwc3: omap: fixes and dual-role preparation Roger Quadros
2016-05-10 9:51 ` [PATCH v7 1/5] usb: dwc3: omap: use request_threaded_irq() Roger Quadros
2016-05-10 9:58 ` Felipe Balbi
2016-05-10 10:04 ` Roger Quadros
2016-05-10 10:12 ` Felipe Balbi
2016-05-10 10:21 ` Roger Quadros
2016-05-11 8:17 ` Roger Quadros
2016-05-11 9:47 ` Felipe Balbi
2016-05-11 11:46 ` Roger Quadros
2016-05-11 12:39 ` Felipe Balbi
2016-05-11 13:52 ` Roger Quadros
2016-05-10 9:51 ` [PATCH v7 2/5] usb: dwc3: omap: Mark the interrupt handler as shared Roger Quadros
2016-05-10 9:51 ` [PATCH v7 3/5] usb: dwc3: omap: Don't set POWERPRESENT Roger Quadros
2016-05-10 9:54 ` Felipe Balbi [this message]
2016-05-10 9:59 ` Roger Quadros
2016-05-10 10:04 ` Felipe Balbi
2016-05-10 10:23 ` Roger Quadros
2016-05-10 10:33 ` Felipe Balbi
2016-05-10 10:24 ` Roger Quadros
2016-05-10 9:51 ` [PATCH v7 4/5] usb: dwc3: omap: Pass VBUS and ID events transparently Roger Quadros
2016-05-10 9:55 ` Felipe Balbi
2016-05-10 10:00 ` Roger Quadros
2016-05-10 10:05 ` Felipe Balbi
2016-05-10 10:13 ` Roger Quadros
2016-05-10 10:13 ` Felipe Balbi
2016-05-10 9:51 ` [PATCH v7 5/5] usb: dwc3: core: cleanup IRQ resources Roger Quadros
2016-05-10 10:03 ` Felipe Balbi
2016-05-10 10:10 ` Roger Quadros
2016-05-10 10:14 ` Felipe Balbi
2016-05-10 11:45 ` Roger Quadros
2016-05-10 11:48 ` Felipe Balbi
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