linux-kernel - Re: [PATCH v2 4/4] PCI: imx: Add PME_Turn

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Message-ID: <20181005110840.GA27329@e107981-ln.cambridge.arm.com>
Date:   Fri, 5 Oct 2018 12:08:40 +0100
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Philipp Zabel <p.zabel@...gutronix.de>
Cc:     Leonard Crestez <leonard.crestez@....com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Richard Zhu <hongxing.zhu@....com>,
        Andrey Smirnov <andrew.smirnov@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Jingoo Han <jingoohan1@...il.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Fabio Estevam <fabio.estevam@....com>,
        dl-linux-imx <linux-imx@....com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 4/4] PCI: imx: Add PME_Turn_Off support

On Fri, Oct 05, 2018 at 12:59:16PM +0200, Philipp Zabel wrote:
> Hi Lorenzo,
> 
> On Fri, 2018-10-05 at 11:29 +0100, Lorenzo Pieralisi wrote:
> > On Thu, Oct 04, 2018 at 04:34:30PM +0000, Leonard Crestez wrote:
> > > When the root complex suspends it must send a PME_Turn_Off TLP.
> > > Implement this by asserting the "turnoff" reset.
> > > 
> > > On imx7d this functionality is part of the SRC and exposed through the
> > > linux reset-controller subsystem. On imx6 equivalent bits are in the
> > > IOMUXC GPR area which the imx6-pcie driver accesses directly.
> > 
> > Nit: I am merging the series, please define what SRC and GPR are so
> > that I can update the commit log accordingly, it must be clear to
> > anyone reading it.
> 
> SRC is the System Reset Controller, which controls reset signals to all
> kinds of devices, among them the PCIe PHY.
> 
> IOMUXC GPR is a General Purpose Register range in the IOMUXC (pinmux
> controller) that is used to control various signals all over the SoC.

Thanks Philipp. Updated the commit log and pushed out the series
for v4.20 (branch pci/dwc - I have just updated this patch log).

Thanks,
Lorenzo