Date: Sun, 8 Dec 2024 11:05:38 +0900 From: =?UTF-8?B?6aKo5L6G5pWj5Lq6?= <furaisanjin@gmail.com> To: "Daniel O'Connor" <darius@dons.net.au> Cc: FreeBSD ARM List <freebsd-arm@freebsd.org> Subject: Re: DS1307 on rpi4B Message-ID: <CAJzLSnw5uuVhc9=HC5sCRv0nBzPXfbq_WVfYrmMg-h99hyRO-A@mail.gmail.com> In-Reply-To: <431FB386-F515-4D77-A855-18055A48E432@dons.net.au> References: <CAJzLSnxOALkCztZUa-zpUH30g1O0nUfQb4X2=4o_VDv3WTEdaQ@mail.gmail.com> <431FB386-F515-4D77-A855-18055A48E432@dons.net.au>
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Hello Daniel.
Thank you for the suggestion. I created dtso file for my HW configuration
like this.
/dts-v1/;
/plugin/;
/ {
compatible = "brcm,bcm2835";
fragment@0 {
target = <&i2c5>;
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
ds1307: ds1307@68 {
compatible = "dallas,ds1307";
reg = <0x68>;
status = "okay";
};
};
};
__overrides__ {
ds1307 = <&ds1307>,"status";
};
};
I modified config.txt to load this dtbo and add one more line to set GPIO
pins in [pi4]
gpio=12,13=a5,pu
This works fine and RTC starts working. One strange thing is that "gpioctl
-l -v" doesn't show correct pin setting somehow. I assumed there should be
PU on pin 12 and 13.
pin 12: 1 pin 12<>,
caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB>
pin 13: 1 pin 13<>,
caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB>
Best regards,
furaisanjin
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