| Message ID | 20190813103759.38358-2-git@andred.net (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/2] PCIe: imx6: imx7d: add support for internal phy refclk source | expand |
On Tue, Aug 13, 2019 at 11:37:59AM +0100, André Draszik wrote: > The i.MX7D variant of the IP can use either an external > crystal oscillator input or an internal clock input as > a reference clock input for the PCIe PHY. > > Document the optional property 'fsl,pcie-phy-refclk-internal' > > Signed-off-by: André Draszik <git@andred.net> > Cc: Richard Zhu <hongxing.zhu@nxp.com> > Cc: Lucas Stach <l.stach@pengutronix.de> > Cc: Bjorn Helgaas <bhelgaas@google.com> > Cc: Rob Herring <robh+dt@kernel.org> > Cc: Mark Rutland <mark.rutland@arm.com> > Cc: Shawn Guo <shawnguo@kernel.org> > Cc: Sascha Hauer <s.hauer@pengutronix.de> > Cc: Pengutronix Kernel Team <kernel@pengutronix.de> > Cc: Fabio Estevam <festevam@gmail.com> > Cc: NXP Linux Team <linux-imx@nxp.com> > Cc: linux-pci@vger.kernel.org > Cc: linux-arm-kernel@lists.infradead.org > Cc: devicetree@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > --- > Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt > index a7f5f5afa0e6..985d7083df9f 100644 > --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt > +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt > @@ -56,6 +56,11 @@ Additional required properties for imx7d-pcie and imx8mq-pcie: > - "turnoff" > - fsl,imx7d-pcie-phy: A phandle to an fsl,imx7d-pcie-phy node. Not sure how this got in, but why is the phy binding not used here? > > +Additional optional properties for imx7d-pcie: > +- fsl,pcie-phy-refclk-internal: If present then an internal PLL input is used > + as PCIe PHY reference clock source. By default an external ocsillator input > + is used. Can't the clock binding and maybe 'assigned-clocks' be used here? Also, this is a property of the PHY, so it belongs in the PHY's node. Rob
Hi Rob, On Tue, 2019-08-27 at 10:56 -0500, Rob Herring wrote: > On Tue, Aug 13, 2019 at 11:37:59AM +0100, André Draszik wrote: > > The i.MX7D variant of the IP can use either an external > > crystal oscillator input or an internal clock input as > > a reference clock input for the PCIe PHY. > > > > Document the optional property 'fsl,pcie-phy-refclk-internal' > > > > Signed-off-by: André Draszik <git@andred.net> > > Cc: Richard Zhu <hongxing.zhu@nxp.com> > > Cc: Lucas Stach <l.stach@pengutronix.de> > > Cc: Bjorn Helgaas <bhelgaas@google.com> > > Cc: Rob Herring <robh+dt@kernel.org> > > Cc: Mark Rutland <mark.rutland@arm.com> > > Cc: Shawn Guo <shawnguo@kernel.org> > > Cc: Sascha Hauer <s.hauer@pengutronix.de> > > Cc: Pengutronix Kernel Team <kernel@pengutronix.de> > > Cc: Fabio Estevam <festevam@gmail.com> > > Cc: NXP Linux Team <linux-imx@nxp.com> > > Cc: linux-pci@vger.kernel.org > > Cc: linux-arm-kernel@lists.infradead.org > > Cc: devicetree@vger.kernel.org > > Cc: linux-kernel@vger.kernel.org > > --- > > Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt | 5 +++++ > > 1 file changed, 5 insertions(+) > > > > diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt > > b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt > > index a7f5f5afa0e6..985d7083df9f 100644 > > --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt > > +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt > > @@ -56,6 +56,11 @@ Additional required properties for imx7d-pcie and imx8mq-pcie: > > - "turnoff" > > - fsl,imx7d-pcie-phy: A phandle to an fsl,imx7d-pcie-phy node. > > Not sure how this got in, but why is the phy binding not used here? > > > > > +Additional optional properties for imx7d-pcie: > > +- fsl,pcie-phy-refclk-internal: If present then an internal PLL input is used > > + as PCIe PHY reference clock source. By default an external ocsillator input > > + is used. > > Can't the clock binding and maybe 'assigned-clocks' be used here? > > Also, this is a property of the PHY, so it belongs in the PHY's node. Thanks for pointing this out. I'll have a look. Andre'
diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt index a7f5f5afa0e6..985d7083df9f 100644 --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt @@ -56,6 +56,11 @@ Additional required properties for imx7d-pcie and imx8mq-pcie: - "turnoff" - fsl,imx7d-pcie-phy: A phandle to an fsl,imx7d-pcie-phy node. +Additional optional properties for imx7d-pcie: +- fsl,pcie-phy-refclk-internal: If present then an internal PLL input is used + as PCIe PHY reference clock source. By default an external ocsillator input + is used. + Additional required properties for imx8mq-pcie: - clock-names: Must include the following additional entries: - "pcie_aux"
The i.MX7D variant of the IP can use either an external crystal oscillator input or an internal clock input as a reference clock input for the PCIe PHY. Document the optional property 'fsl,pcie-phy-refclk-internal' Signed-off-by: André Draszik <git@andred.net> Cc: Richard Zhu <hongxing.zhu@nxp.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Pengutronix Kernel Team <kernel@pengutronix.de> Cc: Fabio Estevam <festevam@gmail.com> Cc: NXP Linux Team <linux-imx@nxp.com> Cc: linux-pci@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt | 5 +++++ 1 file changed, 5 insertions(+)