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Sascha Hauer > > ; Pengutronix Kernel Team > > ; Fabio Estevam ; Rob > > Herring ; Krzysztof Kozlowski ; Conor > > Dooley ; imx@lists.linux.dev; > > linux-arm-kernel@lists.infradead.org; devicetree@vger.kernel.org; > > linux-kernel@vger.kernel.org > > Subject: Re: [PATCH] arm64: dts: imx93-9x9-qsb: add CAN support > > > > On Wed, Nov 26, 2025 at 02:20:07PM +0800, Haibo Chen wrote: > > > > subject suggested, add CAN support overlay file > > > > > CAN1 and Micfil share pins on imx93-9x9-qsb board, use TMUX1574RSVR to > > > control the connection: put sel to high, select CAN1, put sel to low, > > > select Micfil. In default, sel keep low. > > > > > > To support CAN1, need to put the sel to high. Besides, CAN1 use phy > > > TJA1057GT/3. > > > > > > --- > > > Signed-off-by: Haibo Chen > > > --- > > > arch/arm64/boot/dts/freescale/Makefile | 2 + > > > .../boot/dts/freescale/imx93-9x9-qsb-can1.dtso | 63 > > ++++++++++++++++++++++ > > > 2 files changed, 65 insertions(+) > > > > > > diff --git a/arch/arm64/boot/dts/freescale/Makefile > > > b/arch/arm64/boot/dts/freescale/Makefile > > > index > > > > > f30d3fd724d0ce6b38f7bef10e3970ac34f70f4a..1142d3312c8651b4292837bce3 > > cb > > > e46ab95f7e09 100644 > > > --- a/arch/arm64/boot/dts/freescale/Makefile > > > +++ b/arch/arm64/boot/dts/freescale/Makefile > > > @@ -373,7 +373,9 @@ dtb-$(CONFIG_ARCH_MXC) += > > > imx91-tqma9131-mba91xxca.dtb > > > dtb-$(CONFIG_ARCH_MXC) += imx93-9x9-qsb.dtb > > > > > > imx93-9x9-qsb-i3c-dtbs += imx93-9x9-qsb.dtb imx93-9x9-qsb-i3c.dtbo > > > +imx93-9x9-qsb-can1-dtbs += imx93-9x9-qsb.dtb imx93-9x9-qsb-can1.dtbo > > > > Keep order by alphabet. > > > > > dtb-$(CONFIG_ARCH_MXC) += imx93-9x9-qsb-i3c.dtb > > > +dtb-$(CONFIG_ARCH_MXC) += imx93-9x9-qsb-can1.dtb > > > > the same here > > > > can1 should before i3c. > > Okay > > > > > > > > > dtb-$(CONFIG_ARCH_MXC) += imx93-11x11-evk.dtb > > > dtb-$(CONFIG_ARCH_MXC) += imx93-14x14-evk.dtb diff --git > > > a/arch/arm64/boot/dts/freescale/imx93-9x9-qsb-can1.dtso > > > b/arch/arm64/boot/dts/freescale/imx93-9x9-qsb-can1.dtso > > > new file mode 100644 > > > index > > > > > 0000000000000000000000000000000000000000..62d4fa6c21d794f91da59f51 > > 1d6f > > > 0162037e9271 > > > --- /dev/null > > > +++ b/arch/arm64/boot/dts/freescale/imx93-9x9-qsb-can1.dtso > > > @@ -0,0 +1,63 @@ > > ... > > > + > > > +&pcal6524 { > > > + /* > > > + * mic-can-sel-hog have property 'output-low', dt overlay don't > > > + * support /delete-property/. Both 'output-low' and 'output-high' > > > + * will be exist under hog nodes if overlay file set 'output-high'. > > > + * Workaround is disable this hog and create new hog with > > > + * 'output-high'. > > > + */ > > > + mic-can-sel-hog { > > > + status = "disabled"; > > > + }; > > > > are you sure 'status' work for hogs? > > Yes, I test on board, this method works. > Okay, I just want to make sure it works. Frank > Any better solution? > > Regards > Haibo Chen > > > > Frank > > > + > > > + /* > > > + * Config the MIC/CAN_SEL to high, chose B > > > + * port, connect to CAN. > > > + */ > > > + mic-can-high-sel-hog { > > > + gpio-hog; > > > + gpios = <0x11 0x00>; > > > + output-high; > > > + }; > > > +}; > > > > > > --- > > > base-commit: 422f3140bbcb657e1b86c484296972ab76f6d1ff > > > change-id: 20251125-b4-9391-can-dts-2f4849978fc2 > > > > > > Best regards, > > > -- > > > Haibo Chen > > >