| Message ID | 20230113142718.3038265-6-o.rempel@pengutronix.de (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | ARM: imx: make Ethernet refclock configurable | expand |
Hi Oleksij, On 1/13/2023 10:27 PM, Oleksij Rempel wrote: > Old imx6q machine code makes RGMII/RMII clock direction decision based on > configuration of "ptp" clock. "enet_out" is not used and make no real > sense, since we can't configure it as output or use it as clock > provider. > > Instead of "enet_out" use "enet_clk_ref" which is actual selector to > choose between internal and external clock source: > > FEC MAC <---------- enet_clk_ref <--------- SoC PLL > \ > ^------<-> refclock PAD (bi directional) > > Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> > --- > arch/arm/boot/dts/imx6qdl.dtsi | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi > index ff1e0173b39b..71522263031a 100644 > --- a/arch/arm/boot/dts/imx6qdl.dtsi > +++ b/arch/arm/boot/dts/imx6qdl.dtsi > @@ -1050,8 +1050,8 @@ fec: ethernet@2188000 { > clocks = <&clks IMX6QDL_CLK_ENET>, > <&clks IMX6QDL_CLK_ENET>, > <&clks IMX6QDL_CLK_ENET_REF>, > - <&clks IMX6QDL_CLK_ENET_REF>; > - clock-names = "ipg", "ahb", "ptp", "enet_out"; > + <&clks IMX6QDL_CLK_ENET_REF_SEL>; > + clock-names = "ipg", "ahb", "ptp", "enet_clk_ref"; Please also update fec binding, otherwise there will be dtbs check error. Thanks, Peng. > fsl,stop-mode = <&gpr 0x34 27>; > status = "disabled"; > };
On Mon, Jan 16, 2023 at 09:01:08AM +0800, Peng Fan wrote: > Hi Oleksij, > > On 1/13/2023 10:27 PM, Oleksij Rempel wrote: > > Old imx6q machine code makes RGMII/RMII clock direction decision based on > > configuration of "ptp" clock. "enet_out" is not used and make no real > > sense, since we can't configure it as output or use it as clock > > provider. > > > > Instead of "enet_out" use "enet_clk_ref" which is actual selector to > > choose between internal and external clock source: > > > > FEC MAC <---------- enet_clk_ref <--------- SoC PLL > > \ > > ^------<-> refclock PAD (bi directional) > > > > Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> > > --- > > arch/arm/boot/dts/imx6qdl.dtsi | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi > > index ff1e0173b39b..71522263031a 100644 > > --- a/arch/arm/boot/dts/imx6qdl.dtsi > > +++ b/arch/arm/boot/dts/imx6qdl.dtsi > > @@ -1050,8 +1050,8 @@ fec: ethernet@2188000 { > > clocks = <&clks IMX6QDL_CLK_ENET>, > > <&clks IMX6QDL_CLK_ENET>, > > <&clks IMX6QDL_CLK_ENET_REF>, > > - <&clks IMX6QDL_CLK_ENET_REF>; > > - clock-names = "ipg", "ahb", "ptp", "enet_out"; > > + <&clks IMX6QDL_CLK_ENET_REF_SEL>; > > + clock-names = "ipg", "ahb", "ptp", "enet_clk_ref"; > > > Please also update fec binding, otherwise there will be dtbs check error. Hm, there is no restriction on enet_clk_ref use or requirements to use enet_out in Documentation/devicetree/bindings/net/fsl,fec.yaml Do I missing something? Regards, Oleksij
On 1/16/2023 1:26 PM, Oleksij Rempel wrote: > On Mon, Jan 16, 2023 at 09:01:08AM +0800, Peng Fan wrote: >> Hi Oleksij, >> >> On 1/13/2023 10:27 PM, Oleksij Rempel wrote: >>> Old imx6q machine code makes RGMII/RMII clock direction decision based on >>> configuration of "ptp" clock. "enet_out" is not used and make no real >>> sense, since we can't configure it as output or use it as clock >>> provider. >>> >>> Instead of "enet_out" use "enet_clk_ref" which is actual selector to >>> choose between internal and external clock source: >>> >>> FEC MAC <---------- enet_clk_ref <--------- SoC PLL >>> \ >>> ^------<-> refclock PAD (bi directional) >>> >>> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> >>> --- >>> arch/arm/boot/dts/imx6qdl.dtsi | 4 ++-- >>> 1 file changed, 2 insertions(+), 2 deletions(-) >>> >>> diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi >>> index ff1e0173b39b..71522263031a 100644 >>> --- a/arch/arm/boot/dts/imx6qdl.dtsi >>> +++ b/arch/arm/boot/dts/imx6qdl.dtsi >>> @@ -1050,8 +1050,8 @@ fec: ethernet@2188000 { >>> clocks = <&clks IMX6QDL_CLK_ENET>, >>> <&clks IMX6QDL_CLK_ENET>, >>> <&clks IMX6QDL_CLK_ENET_REF>, >>> - <&clks IMX6QDL_CLK_ENET_REF>; >>> - clock-names = "ipg", "ahb", "ptp", "enet_out"; >>> + <&clks IMX6QDL_CLK_ENET_REF_SEL>; >>> + clock-names = "ipg", "ahb", "ptp", "enet_clk_ref"; >> >> >> Please also update fec binding, otherwise there will be dtbs check error. > > Hm, there is no restriction on enet_clk_ref use or requirements to use > enet_out in Documentation/devicetree/bindings/net/fsl,fec.yaml > > Do I missing something? After check, seems using enet_out would trigger dtbs_check error, using enet_clk_ref would not as what you did in this patch. So your patch is fine. clock-names: minItems: 2 maxItems: 5 items: enum: - ipg - ahb - ptp - enet_clk_ref - enet_out - enet_2x_txclk Regards, Peng. > > Regards, > Oleksij
diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi index ff1e0173b39b..71522263031a 100644 --- a/arch/arm/boot/dts/imx6qdl.dtsi +++ b/arch/arm/boot/dts/imx6qdl.dtsi @@ -1050,8 +1050,8 @@ fec: ethernet@2188000 { clocks = <&clks IMX6QDL_CLK_ENET>, <&clks IMX6QDL_CLK_ENET>, <&clks IMX6QDL_CLK_ENET_REF>, - <&clks IMX6QDL_CLK_ENET_REF>; - clock-names = "ipg", "ahb", "ptp", "enet_out"; + <&clks IMX6QDL_CLK_ENET_REF_SEL>; + clock-names = "ipg", "ahb", "ptp", "enet_clk_ref"; fsl,stop-mode = <&gpr 0x34 27>; status = "disabled"; };
Old imx6q machine code makes RGMII/RMII clock direction decision based on configuration of "ptp" clock. "enet_out" is not used and make no real sense, since we can't configure it as output or use it as clock provider. Instead of "enet_out" use "enet_clk_ref" which is actual selector to choose between internal and external clock source: FEC MAC <---------- enet_clk_ref <--------- SoC PLL \ ^------<-> refclock PAD (bi directional) Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> --- arch/arm/boot/dts/imx6qdl.dtsi | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)