Date: Wed, 25 Jul 2018 11:55:47 +0200 From: Per olof Ljungmark <peo@nethead.se> To: freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: rpi3 and Adafruit GPS hat continued Message-ID: <2f55aaea-6832-7441-1011-b8288628a4a9@nethead.se> In-Reply-To: <ba6d3be7-73ed-46b7-df87-0cf98b035397@nethead.se> References: <d1341718-f8a3-31f9-9ac4-24b7a2de51d9@nethead.se> <CANCZdfrDXytg%2B3a5O%2BHch5fMhm85Uf5GGKKVP=AfbPydO-c22Q@mail.gmail.com> <ba6d3be7-73ed-46b7-df87-0cf98b035397@nethead.se>
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On 07/25/18 11:27, Per olof Ljungmark wrote: > On 07/25/18 04:25, Warner Losh wrote: >> >> >> On Tue, Jul 24, 2018 at 1:44 PM, Per olof Ljungmark <peo@nethead.se >> <mailto:peo@nethead.se>> wrote: >> >> Thanks to >> http://freebsd.1045724.x6.nabble.com/Adding-a-GPS-Module-hat-shield-on-a-Raspberry-Pi-td6236680.html >> <http://freebsd.1045724.x6.nabble.com/Adding-a-GPS-Module-hat-shield-on-a-Raspberry-Pi-td6236680.html>; >> and helpful people on the list I managed to get the pi to boot by >> silencing the console messages in u-boot. >> >> I skipped the switch and patched rpi.h: >> >> @@ -85,10 +87,13 @@ >> #define CONFIG_INITRD_TAG >> >> /* Environment */ >> +#define CONFIG_SYS_DEVICE_NULLDEV >> +#define CONFIG_SILENT_CONSOLE_UPDATE_ON_RELOC >> +#define CONFIG_SILENT_CONSOLE_UPDATE_ON_SET >> #define ENV_DEVICE_SETTINGS \ >> - "stdin=serial,usbkbd\0" \ >> - "stdout=serial,vidconsole\0" \ >> - "stderr=serial,vidconsole\0" >> + "stdin=usbkbd\0" \ >> + "stdout=vidconsole\0" \ >> + "stderr=vidconsole\0" >> >> and now the pi is booting. >> >> Now to the next problem, I need to rewire TXD and RXD and add reception >> of the PPS signal on pin 4. The advice in the link above is not >> appclicable to current and rpi3. >> >> Right now uart1 is wired to the RXD and TXD pins, I want uart0. Is it >> recompile a dts or use gpioctl? >> >> uart0: <PrimeCell UART (PL011)> mem 0x7e201000-0x7e201fff irq 24 on >> simplebus0 >> uart1: <BCM2835 Mini-UART> mem 0x7e215040-0x7e21507f irq 32 on >> simplebus0 >> uart1: console (115200,n,8,1) >> >> >> I'm pretty sure that you'll need to hack dts. > > Yes. Most importantly, stop the kernel from talking to the serial console. > > I've been wandering around the source and right now the theory is to > change /usr/src/sys/gnu/dts/arm/bcm283x.dtsi, it is the only place in > all the included dts files where I find a reference to the console: > > chosen { > stdout-path = "serial0:115200n8"; > }; > > Says nothing about stdin though, not anywhere. Tried stdout-path = ""; but that did not help. I'm giving up and move to rpi2 and 11.2 instead. Phew.
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