linux-kernel - Re: [PATCH 00/12] Bring suspend to RAM support to PCIe Aardvark driver

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Date:   Mon, 26 Nov 2018 08:50:51 -0600
From:   Bjorn Helgaas <bhelgaas@...gle.com>
To:     miquel.raynal@...tlin.com
Cc:     gregory.clement@...tlin.com, Jason Cooper <jason@...edaemon.net>,
        Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        thomas.petazzoni@...tlin.com, devicetree@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        linux-pci@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm <linux-arm-kernel@...ts.infradead.org>,
        antoine.tenart@...tlin.com, maxime.chevallier@...tlin.com,
        Nadav Haklai <nadavh@...vell.com>
Subject: Re: [PATCH 00/12] Bring suspend to RAM support to PCIe Aardvark driver

On Fri, Nov 23, 2018 at 8:18 AM Miquel Raynal <miquel.raynal@...tlin.com> wrote:
>
> Hello,
>
> As part of an effort to bring suspend to RAM support to Armada 3700
> SoCs (main target: ESPRESSObin), this series handles the work around
> the PCIe IP.
>
> First, more configuration is done in the 'setup' helper as inspired
> from the U-Boot driver. This is needed to entirely initialize the IP
> during future resume operation (patch 1).
>
> Then, reset GPIO, PHY and clock support are introduced (patch 2-4). As
> current device trees do not provide the corresponding properties, not
> finding one of these properties is not an error and just produces a
> warning. However, if the property is present, an error during PHY
> initialization will fail the probe of the driver.
>
> Note: To be sure the clock will be resumed before this driver, a first
> series adding links between clocks and consumers has been submitted,
> see [1].
>
> Patch 5 adds suspend/resume hooks, re-using all the above.
>
> Finally, bindings and device trees are updated to reflect the hardware
> (patch 6-12). While the clock depends on the SoC, the reset GPIO and
> the PHY depends on the board so the clock is added in the
> armada-37xx.dtsi file while the two other properties are added in
> armada-3720-espressobin.dts.
>
> [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2018-November/614527.html
>
> Thanks,
> Miquèl
>
>
> Miquel Raynal (12):
>   PCI: aardvark: configure more registers in the configuration helper
>   PCI: aardvark: add reset GPIO support
>   PCI: aardvark: add PHY support
>   PCI: aardvark: add clock support
>   PCI: aardvark: add suspend to RAM support
>   dt-bindings: PCI: aardvark: describe the reset-gpios property
>   dt-bindings: PCI: aardvark: describe the clocks property
>   dt-bindings: PCI: aardvark: describe the PHY property
>   ARM64: dts: marvell: armada-37xx: declare PCIe reset pin
>   ARM64: dts: marvell: armada-3720-espressobin: declare PCIe reset GPIO
>   ARM64: dts: marvell: armada-37xx: declare PCIe clock
>   ARM64: dts: marvell: armada-3720-espressobin: declare PCIe PHY

Hi Miquèl,

Thanks for your work!  If/when you post a v2, please run "git log
--oneline" and adjust your subject lines to match the capitalization
conventions, i.e., for PCI, start the description with a capital
letter: "PCI: aardvark: Add suspend to RAM support".

BTW, I notice you closed your email with "Miquèl", but the patches
contain "Miquel".  you *should* be able to use the correctly accented
version of your name in the Signed-off-by lines.  I have tripped over
some tool issues, but if we pay attention, we should be able to get it
to work.

>  .../devicetree/bindings/pci/aardvark-pci.txt  |   9 +
>  .../dts/marvell/armada-3720-espressobin.dts   |   4 +
>  arch/arm64/boot/dts/marvell/armada-37xx.dtsi  |   5 +
>  drivers/pci/controller/pci-aardvark.c         | 214 ++++++++++++++++++
>  4 files changed, 232 insertions(+)
>
> --
> 2.19.1
>