Hi Biju,
On Thu, Apr 20, 2023 at 5:49 PM Biju Das <biju.das.jz@xxxxxxxxxxxxxx> wrote:
> > -----Original Message-----
> > From: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
> > Sent: Thursday, April 20, 2023 4:40 PM
> > To: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > Cc: Rob Herring <robh+dt@xxxxxxxxxx>; Krzysztof Kozlowski
> > <krzysztof.kozlowski+dt@xxxxxxxxxx>; Geert Uytterhoeven
> > <geert+renesas@xxxxxxxxx>; Magnus Damm <magnus.damm@xxxxxxxxx>; linux-
> > renesas-soc@xxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx; Prabhakar Mahadev
> > Lad <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> > Subject: Re: [PATCH 3/3] arm64: dts: renesas: rzg2l-smarc: Enable MTU3a
> > counter using DT overlay
> >
> > Hi Biju,
> >
> > On Mon, Apr 17, 2023 at 11:02 AM Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > wrote:
> > > Enable mtu3 node using dt overlay and disable scif2 node and delete
> > > {sd1_mux,sd1_mux_uhs} nodes as the pins are shared with mtu3 external
> > > clock input pins and Z phase signal(MTIOC1A).
> > >
> > > Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > > --- /dev/null
> > > +++ b/arch/arm64/boot/dts/renesas/rzg2l-smarc-pmod.dtso
> > > @@ -0,0 +1,43 @@
> > > +// SPDX-License-Identifier: GPL-2.0
> > > +/*
> > > + * Device Tree Source for the RZ/{G2L,V2L} SMARC EVK PMOD parts
> > > + *
> > > + * Copyright (C) 2023 Renesas Electronics Corp.
> > > + */
> > > +
> > > +/dts-v1/;
> > > +/plugin/;
> > > +
> > > +#include <dt-bindings/pinctrl/rzg2l-pinctrl.h>
> > > +
> > > +&mtu3 {
> > > + pinctrl-0 = <&mtu3_pins>;
> > > + pinctrl-names = "default";
> > > +
> > > + status = "okay";
> > > +};
> > > +
> > > +&pinctrl {
> > > + mtu3_pins: mtu3 {
> > > + mtu3-zphase-clk {
> > > + pinmux = <RZG2L_PORT_PINMUX(19, 0, 3)>; /* MTIOC1A
> > */
> > > + };
> >
> > Unless I'm missing something, this signal is not available on the PMOD
> > connector?
>
> Yes, it is not available on the PMOD connector. SD card detection signal,
> is muxed with MTIOC1A (Z Phase signal). So for counter use case, we use it
> as MTIOC1A pins.
As the signal is not available on the PMOD connector, can't you just ignore
the Z Phase signal, and keep the SD card CD signal available instead?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
