Date: Mon, 20 Apr 2015 17:24:46 +0300 From: Daniel Braniss <danny@cs.huji.ac.il> To: Luiz Otavio O Souza <lists.br@gmail.com> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>, Ian Lepore <ian@freebsd.org> Subject: Re: help with coding a loadable kernel module Message-ID: <62021BE7-5941-4B0C-A74D-01C9AC415AB8@cs.huji.ac.il> In-Reply-To: <07F11A62-F2A0-404E-B409-6848418A3B29@cs.huji.ac.il> References: <EDB591F5-E056-4E53-9ED2-2A2E571F319C@cs.huji.ac.il> <20150417080839.GO2743@home.opsec.eu> <9B835088-661C-456E-84A7-47BC1835C0CB@cs.huji.ac.il> <20150417095536.GA38091@gmail.com> <32D7EBD3-813E-4062-8A06-ED8E82BA50DA@cs.huji.ac.il> <1429276417.1182.71.camel@freebsd.org> <C6A90444-22F4-4EDF-BE3D-C384F61BB0B4@cs.huji.ac.il> <FCC970B7-EA7C-4378-9B97-8E9B31329D47@bsdimp.com> <8C177A8C-F6B2-43D5-925F-A3C33B6CF577@cs.huji.ac.il> <CAB=2f8xhs9SHCFE6oAUhCS-m_9U2AGEe_520vfAdMaBbE_Ca9A@mail.gmail.com> <07F11A62-F2A0-404E-B409-6848418A3B29@cs.huji.ac.il>
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now that I=E2=80=99m ready to connect the hardware, where/how do I = configure the IRQ and RESET pins? I presume in the dts file =E2=80=A6 I probably have to reserve/define also the SPI lines? If there is some documentation I should read instead, please let me = know. cheers, danny > On Apr 18, 2015, at 4:17 PM, Daniel Braniss <danny@cs.huji.ac.il> = wrote: >=20 >=20 >> On Apr 18, 2015, at 3:51 AM, Luiz Otavio O Souza <lists.br@gmail.com> = wrote: >>=20 >> On 17 April 2015 at 11:08, Daniel Braniss wrote: >>>=20 >>>> On Apr 17, 2015, at 4:42 PM, Warner Losh wrote: >>>>=20 >> ... >>>>=20 >>>> If you are using FDT in your system, then you=E2=80=99ll put your = device into the >>>> FDT tree below the spibus to create the device_t node in the tree. = When >>>> your module is loaded, its probe routine will be called, and you = can >>>> match based on the compatible string given in the FDT. >>>>=20 >>>=20 >>> I was afraid of that :-), this FDT stuff is new to me, and so far I = was successful >>> in adding a gpio/led, but grep has not found any spibus. >>> any chance for a small template/example ? rpi or bbb would help! >>>=20 >>> cheers >>> danny >>=20 >> Hi Daniel, >>=20 >> Here is an example of such change for RPi: http://pastie.org/10099132 >>=20 >> The SPI controller node is defined at >> sys/boot/fdt/dts/arm/bcm2835.dtsi, but usually the local changes go = in >> sys/boot/fdt/dts/arm/rpi.dts. >>=20 >> Once you boot your system you can check your DTS tree with ofwdump -a >>=20 >> Cheers, >> Luiz >=20 > pending some cosmetics, the driver gets loaded! and a /dev/rfid0 = appears! >=20 > thanks guys, I still have to figure out some magics, and some SPI = MFRC protocol. >=20 > as soon as I have a decent working version i=E2=80=99ll submit the = driver. >=20 > thanks again, >=20 > danny >=20 > _______________________________________________ > freebsd-arm@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-arm > To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org"
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