From: Shawn Guo <shawnguo@kernel.org>
To: Richard Zhu <hongxing.zhu@nxp.com>
Cc: "l.stach@pengutronix.de" <l.stach@pengutronix.de>,
dl-linux-imx <linux-imx@nxp.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Re: [PATCH] arm64: dts: imx8mq-evk: add one regulator used to power up pcie phy
Date: Mon, 26 Apr 2021 10:00:54 +0800 [thread overview]
Message-ID: <20210426020053.GE27585@dragon> (raw)
In-Reply-To: <VI1PR04MB5853CB1B4E6C07C2DC3BC8D88C429@VI1PR04MB5853.eurprd04.prod.outlook.com>
On Mon, Apr 26, 2021 at 01:28:34AM +0000, Richard Zhu wrote:
> > -----Original Message-----
> <snipped>
> > Subject: Re: [PATCH] arm64: dts: imx8mq-evk: add one regulator used
> > to power up pcie phy
> > On Mon, Mar 29, 2021 at 04:06:03PM +0800, Richard Zhu wrote:
> > > 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@nxp.com>
> > > Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
> > > ---
> > > arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 1 +
> > > 1 file changed, 1 insertion(+)
> > >
> > > diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> > > b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> > > index 85b045253a0e..4d2035e3dd7c 100644
> > > --- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> > > +++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> > > @@ -318,6 +318,7 @@
> > > <&clk IMX8MQ_CLK_PCIE1_PHY>,
> > > <&pcie0_refclk>;
> > > clock-names = "pcie", "pcie_aux", "pcie_phy", "pcie_bus";
> > > + vph-supply = <&vgen5_reg>;
> >
> > Hmm, I do not see this in the bindings doc.
> [Richard Zhu] Hi Shawn:
> The binding document changes are going to PCI tree by the following patch.
>
> https://patchwork.kernel.org/project/linux-pci/patch/1617091701-6444-2-git-send-email-hongxing.zhu@nxp.com/
Ah, okay, ping me when the series is applied to PCI tree.
Shawn
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parent reply other threads:[~2021-04-26 2:03 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <VI1PR04MB5853CB1B4E6C07C2DC3BC8D88C429@VI1PR04MB5853.eurprd04.prod.outlook.com>]
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