From: Rob Herring <robh@kernel.org>
To: "Pali Rohár" <pali@kernel.org>
Cc: "Jason Cooper" <jason@lakedaemon.net>,
"Andrew Lunn" <andrew@lunn.ch>,
"Gregory Clement" <gregory.clement@bootlin.com>,
"Sebastian Hesselbarth" <sebastian.hesselbarth@gmail.com>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Andrew Murray" <amurray@thegoodpenguin.co.uk>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Remi Pommarel" <repk@triplefau.lt>,
"Marek Behún" <marek.behun@nic.cz>,
"Tomasz Maciej Nowak" <tmn505@gmail.com>,
Xogium <contact@xogium.me>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-pci@vger.kernel.org
Subject: Re: [PATCH v4 07/12] PCI: aardvark: Add PHY support
Date: Thu, 7 May 2020 16:23:47 -0500 [thread overview]
Message-ID: <20200507212347.GA22382@bogus> (raw)
In-Reply-To: <20200430080625.26070-8-pali@kernel.org>
On Thu, 30 Apr 2020 10:06:20 +0200, =?UTF-8?q?Pali=20Roh=C3=A1r?= wrote:
> From: Marek Behún <marek.behun@nic.cz>
>
> With recent proposed changes for U-Boot it is possible that bootloader
> won't initialize the PHY for this controller (currently the PHY is
> initialized regardless whether PCI is used in U-Boot, but with these
> proposed changes the PHY is initialized only on request).
>
> Since the mvebu-a3700-comphy driver by Miquèl Raynal supports enabling
> PCIe PHY, and since Linux' functionality should be independent on what
> bootloader did, add code for enabling generic PHY if found in device OF
> node.
>
> The mvebu-a3700-comphy driver does PHY powering via SMC calls to ARM
> Trusted Firmware. The corresponding code in ARM Trusted Firmware skips
> one register write which U-Boot does not: step 7 ("Enable TX"), see [1].
> Instead ARM Trusted Firmware expects PCIe driver to do this step,
> probably because the register is in PCIe controller address space,
> instead of PHY address space. We therefore add this step into the
> advk_pcie_setup_hw function.
>
> [1] https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/tree/drivers/marvell/comphy/phy-comphy-3700.c?h=v2.3-rc2#n836
>
> Signed-off-by: Marek Behún <marek.behun@nic.cz>
> Cc: Miquèl Raynal <miquel.raynal@bootlin.com>
> ---
> drivers/pci/controller/pci-aardvark.c | 69 +++++++++++++++++++++++++++
> 1 file changed, 69 insertions(+)
>
Reviewed-by: Rob Herring <robh@kernel.org>
next prev parent reply other threads:[~2020-05-07 21:23 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-30 8:06 [PATCH v4 00/12] PCI: aardvark: Fix support for Turris MOX and Compex wifi cards Pali Rohár
2020-04-30 8:06 ` [PATCH v4 01/12] PCI: aardvark: Train link immediately after enabling training Pali Rohár
2020-05-04 15:50 ` Bjorn Helgaas
2020-05-07 21:05 ` Rob Herring
2020-04-30 8:06 ` [PATCH v4 02/12] PCI: aardvark: Don't blindly enable ASPM L0s and don't write to read-only register Pali Rohár
2020-05-07 21:07 ` Rob Herring
2020-04-30 8:06 ` [PATCH v4 03/12] PCI: of: Zero max-link-speed value is invalid Pali Rohár
2020-05-07 21:07 ` Rob Herring
2020-04-30 8:06 ` [PATCH v4 04/12] PCI: aardvark: Improve link training Pali Rohár
2020-05-07 21:10 ` Rob Herring
2020-04-30 8:06 ` [PATCH v4 05/12] PCI: aardvark: Issue PERST via GPIO Pali Rohár
2020-04-30 8:22 ` Pali Rohár
2020-05-07 21:20 ` Rob Herring
2020-04-30 8:06 ` [PATCH v4 06/12] PCI: aardvark: Add FIXME comment for PCIE_CORE_CMD_STATUS_REG access Pali Rohár
2020-05-07 21:20 ` Rob Herring
2020-04-30 8:06 ` [PATCH v4 07/12] PCI: aardvark: Add PHY support Pali Rohár
2020-05-07 21:23 ` Rob Herring [this message]
2020-04-30 8:06 ` [PATCH v4 08/12] PCI: aardvark: Replace custom macros by standard linux/pci_regs.h macros Pali Rohár
2020-05-04 15:52 ` Bjorn Helgaas
2020-05-07 21:24 ` Rob Herring
2020-04-30 8:06 ` [PATCH v4 09/12] dt-bindings: PCI: aardvark: Describe new properties Pali Rohár
2020-05-07 21:25 ` Rob Herring
2020-04-30 8:06 ` [PATCH v4 10/12] arm64: dts: marvell: armada-37xx: Set pcie_reset_pin to gpio function Pali Rohár
2020-04-30 8:06 ` [PATCH v4 11/12] arm64: dts: marvell: armada-37xx: Move PCIe comphy handle property Pali Rohár
2020-04-30 8:06 ` [PATCH v4 12/12] arm64: dts: marvell: armada-37xx: Move PCIe max-link-speed property Pali Rohár
2020-05-04 15:50 ` Bjorn Helgaas
2020-05-08 13:11 ` [PATCH v4 00/12] PCI: aardvark: Fix support for Turris MOX and Compex wifi cards Tomasz Maciej Nowak
2020-05-13 11:16 ` Pali Rohár
2020-05-13 11:33 ` Lorenzo Pieralisi
2020-05-13 11:59 ` Pali Rohár
2020-05-13 11:56 ` Thomas Petazzoni
2020-05-17 15:57 ` Gregory CLEMENT
2020-05-18 10:30 ` Pali Rohár
2020-05-18 13:46 ` Lorenzo Pieralisi
2020-05-18 13:50 ` Marek Behun
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