From: Bjorn Helgaas <helgaas@kernel.org>
To: Frank Wunderlich <linux@fw-web.de>, Rob Herring <robh+dt@kernel.org>
Cc: linux-rockchip@lists.infradead.org,
"Frank Wunderlich" <frank-w@public-files.de>,
"Kishon Vijay Abraham I" <kishon@ti.com>,
"Vinod Koul" <vkoul@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Heiko Stuebner" <heiko@sntech.de>,
"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Philipp Zabel" <p.zabel@pengutronix.de>,
"Johan Jonker" <jbx6244@gmail.com>,
"Peter Geis" <pgwipeout@gmail.com>,
"Michael Riesch" <michael.riesch@wolfvision.net>,
linux-phy@lists.infradead.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org
Subject: Re: [RFC/RFT 4/6] PCI: rockchip-dwc: add pcie bifurcation
Date: Sat, 16 Apr 2022 18:30:47 -0500 [thread overview]
Message-ID: <20220416233047.GA938296@bhelgaas> (raw)
In-Reply-To: <20220416135458.104048-5-linux@fw-web.de>
On Sat, Apr 16, 2022 at 03:54:56PM +0200, Frank Wunderlich wrote:
> From: Frank Wunderlich <frank-w@public-files.de>
>
> PCIe Lanes can be split to 2 slots with bifurcation.
> Add support for this in existing pcie driver.
Please s/pcie/PCIe/ in subject and above to be consistent. You also
have kind of a random usage in other patches.
Mention the DT property used for this in the commit log.
Is the "rockchip,bifurcation" DT property something that should be
generalized so it's not rockchip-specific? Other controllers are
likely to support similar functionality.
> Co-developed-by: Peter Geis <pgwipeout@gmail.com>
> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> ---
> drivers/pci/controller/dwc/pcie-dw-rockchip.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/drivers/pci/controller/dwc/pcie-dw-rockchip.c b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
> index 863374604fb1..1b0c2115b32e 100644
> --- a/drivers/pci/controller/dwc/pcie-dw-rockchip.c
> +++ b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
> @@ -20,6 +20,7 @@
> #include <linux/platform_device.h>
> #include <linux/regmap.h>
> #include <linux/reset.h>
> +#include <linux/phy/pcie.h>
>
> #include "pcie-designware.h"
>
> @@ -59,6 +60,7 @@ struct rockchip_pcie {
> struct regulator *vpcie3v3;
> struct irq_domain *irq_domain;
> raw_spinlock_t irq_lock;
> + bool bifurcation;
> };
>
> static int rockchip_pcie_readl_apb(struct rockchip_pcie *rockchip,
> @@ -273,6 +275,12 @@ static int rockchip_pcie_phy_init(struct rockchip_pcie *rockchip)
> return dev_err_probe(dev, PTR_ERR(rockchip->phy),
> "missing PHY\n");
>
> + if (rockchip->bifurcation) {
> + ret = phy_set_mode_ext(rockchip->phy, PHY_MODE_PCIE, PHY_MODE_PCIE_BIFURCATION);
> + if (ret)
> + return ret;
> + }
> +
> ret = phy_init(rockchip->phy);
> if (ret < 0)
> return ret;
> @@ -345,6 +353,9 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
> }
> }
>
> + if (device_property_read_bool(dev, "rockchip,bifurcation"))
> + rockchip->bifurcation = true;
> +
> ret = rockchip_pcie_phy_init(rockchip);
> if (ret)
> goto disable_regulator;
> --
> 2.25.1
>
>
> --
> linux-phy mailing list
> linux-phy@lists.infradead.org
> https://lists.infradead.org/mailman/listinfo/linux-phy
next prev parent reply other threads:[~2022-04-16 23:30 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-16 13:54 [RFC/RFT 0/6] RK3568 PCIe V3 support Frank Wunderlich
2022-04-16 13:54 ` [RFC/RFT 1/6] dt-bindings: phy: rockchip: add pcie3 phy Frank Wunderlich
2022-04-18 15:52 ` Krzysztof Kozlowski
2022-04-19 17:49 ` Aw: " Frank Wunderlich
2022-04-19 19:43 ` Krzysztof Kozlowski
2022-04-19 20:36 ` Aw: " Frank Wunderlich
2022-04-19 20:48 ` Krzysztof Kozlowski
2022-04-16 13:54 ` [RFC/RFT 2/6] dt-bindings: soc: grf: add pcie30-{phy,pipe}-grf Frank Wunderlich
2022-04-18 15:54 ` Krzysztof Kozlowski
2022-04-19 17:29 ` Aw: " Frank Wunderlich
2022-04-19 19:40 ` Krzysztof Kozlowski
2022-04-20 13:04 ` Aw: " Frank Wunderlich
2022-04-16 13:54 ` [RFC/RFT 3/6] phy: rockchip: Support pcie v3 Frank Wunderlich
2022-04-18 10:38 ` Vinod Koul
2022-04-18 15:57 ` Krzysztof Kozlowski
2022-04-20 7:29 ` Philipp Zabel
2022-04-16 13:54 ` [RFC/RFT 4/6] PCI: rockchip-dwc: add pcie bifurcation Frank Wunderlich
2022-04-16 23:30 ` Bjorn Helgaas [this message]
2022-04-17 9:08 ` Aw: " Frank Wunderlich
2022-04-18 15:53 ` Bjorn Helgaas
2022-04-18 16:17 ` Peter Geis
2022-04-21 15:41 ` Aw: " Frank Wunderlich
2022-04-16 13:54 ` [RFC/RFT 5/6] arm64: dts: rockchip: rk3568: Add PCIe v3 nodes Frank Wunderlich
2022-04-16 13:54 ` [RFC/RFT 6/6] arm64: dts: rockchip: Add PCIe v3 nodes to BPI-R2-Pro Frank Wunderlich
2022-04-18 15:57 ` Krzysztof Kozlowski
2022-05-11 19:26 ` [RFC/RFT 0/6] RK3568 PCIe V3 support Piotr Oniszczuk
2022-05-11 20:10 ` Frank Wunderlich
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