linux-kernel - Re: [RESEND v4 1/2] dt-bindings: imx6q-pcie: add one regulator used to power up pcie phy

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Message-ID: <7900502879b346e18727f956965ace34a146c0f1.camel@pengutronix.de>
Date:   Thu, 06 May 2021 18:08:24 +0200
From:   Lucas Stach <l.stach@...gutronix.de>
To:     lorenzo.pieralisi@....com
Cc:     linux-pci@...r.kernel.org, linux-imx@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de, Richard Zhu <hongxing.zhu@....com>,
        andrew.smirnov@...il.com, shawnguo@...nel.org, kw@...ux.com,
        bhelgaas@...gle.com, stefan@...er.ch
Subject: Re: [RESEND v4 1/2] dt-bindings: imx6q-pcie: add one regulator used
 to power up pcie phy

Hi Lorenzo,

have those two patches fallen through some crack? AFAICS they are gone
from patchwork, but I also can't find them in any branch in the usual
git repos.

Regards,
Lucas

Am Dienstag, dem 30.03.2021 um 16:08 +0800 schrieb Richard Zhu:
> Both 1.8v and 3.3v power supplies can be used by i.MX8MQ PCIe PHY.
> In default, the PCIE_VPH voltage is suggested to be 1.8v refer to data
> sheet. When PCIE_VPH is supplied by 3.3v in the HW schematic design,
> the VREG_BYPASS bits of GPR registers should be cleared from default
> value 1b'1 to 1b'0. Thus, the internal 3v3 to 1v8 translator would be
> turned on.
> 
> Signed-off-by: Richard Zhu <hongxing.zhu@....com>
> Reviewed-by: Lucas Stach <l.stach@...gutronix.de>
> ---
>  Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt
> index de4b2baf91e8..d8971ab99274 100644
> --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt
> +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt
> @@ -38,6 +38,9 @@ Optional properties:
>    The regulator will be enabled when initializing the PCIe host and
>    disabled either as part of the init process or when shutting down the
>    host.
> +- vph-supply: Should specify the regulator in charge of VPH one of the three
> +  PCIe PHY powers. This regulator can be supplied by both 1.8v and 3.3v voltage
> +  supplies.
>  
> 
>  Additional required properties for imx6sx-pcie:
>  - clock names: Must include the following additional entries: