RE: [PATCH v3 1/2] usb: ohci-at91: Forcibly suspend ports while USB suspend

Yang, Wenyou
2016-06-20T07:50:15Z

> -----Original Message-----
> From: Ferre, Nicolas
> Sent: 2016年6月8日 18:46
> To: Yang, Wenyou <Wenyou.Yang@atmel.com>; Alan Stern
> <stern@rowland.harvard.edu>; Greg Kroah-Hartman
> <gregkh@linuxfoundation.org>; Rob Herring <robh+dt@kernel.org>; Alexandre
> Belloni <alexandre.belloni@free-electrons.com>
> Cc: Pawel Moll <pawel.moll@arm.com>; Mark Brown <broonie@kernel.org>; Ian
> Campbell <ijc+devicetree@hellion.org.uk>; Kumar Gala <galak@codeaurora.org>;
> linux-kernel@vger.kernel.org; devicetree@vger.kernel.org; linux-arm-
> kernel@lists.infradead.org; linux-usb@vger.kernel.org
> Subject: Re: [PATCH v3 1/2] usb: ohci-at91: Forcibly suspend ports while USB
> suspend
>
> Le 08/06/2016 12:04, Nicolas Ferre a écrit :
> > Le 08/06/2016 06:15, Wenyou Yang a écrit :
> >> In order to the save power consumption, as a workaround, suspend
> >> forcibly the USB PORTA/B/C via set the SUSPEND_A/B/C bits of OHCI
> >> Interrupt Configuration Register in the SFRs while OHCI USB suspend.
> >>
> >> This suspend operation must be done before the USB clock is disabled,
> >> resume after the USB clock is enabled.
> >>
> >> Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> >
> > Little nitpicking below...
> >
> >> ---
> >>
> >> Changes in v3:
> >> - Change the compatible description for more precise.
> >>
> >> Changes in v2:
> >> - Add compatible to support forcibly suspend the ports.
> >> - Add soc/at91/at91_sfr.h to accommodate the defines.
> >> - Add error checking for .sfr_regmap.
> >> - Remove unnecessary regmap_read() statement.
> >>
> >> .../devicetree/bindings/usb/atmel-usb.txt | 6 +-
> >> drivers/usb/host/ohci-at91.c | 80 +++++++++++++++++++++-
> >> include/soc/at91/at91_sfr.h | 29 ++++++++
>
> Oops sorry, additional comment which is not nitpicking, this one:
>
> We already have SFR header file in this patch:
>
> Author: Cyrille Pitchen <cyrille.pitchen@atmel.com>
> Date: Thu Mar 17 17:04:00 2016 +0100
>
> ARM: dts: at91: sama5d2: add SFR node
>
> This SFR node is looked up by the I2S controller driver to tune the
> SFR_I2SCLKSEL register.
>
> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> Acked-by: Rob Herring <robh@kernel.org>
> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
>
> Which is already accepted by arm-soc guys for 4.7... So my ack transforms into a
> nack, sorry...
>
> We will have to coordinate the effort and maybe take the whole series with us. But
> for sure, you'll have to use the existing include/soc/at91/atmel-sfr.h file and build
> on top of it...

Sorry, not notice this file.

I will built it on this file.

>
> Bye,
>
> >> 3 files changed, 112 insertions(+), 3 deletions(-) create mode
> >> 100644 include/soc/at91/at91_sfr.h
>
> [..]
>
> >
> > But you can take my:
> >
> > Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
> >
> > with the little corrections listed.
> >
> > Alan, We plan to take the second patch of this series with AT91 git
> > tree through arm-soc. Do you agree to take this one through yours?
>
> Alan, forget this request, we'll have to coordinate differently.
>
> Sorry for the noise. Bye,
> --
> Nicolas Ferre

Best Regards,
Wenyou Yang