Date: Fri, 24 Apr 2015 10:16:10 +0200 From: Milan Obuch <freebsd-arm@dino.sk> To: freebsd-arm@freebsd.org Subject: Re: FDT help Message-ID: <20150424101610.469ba9bc@zeta.dino.sk> In-Reply-To: <80F17668-BEF0-42BD-9243-AE41ACAF255E@cs.huji.ac.il>
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On Fri, 24 Apr 2015 11:00:33 +0300
Daniel Braniss <danny@cs.huji.ac.il> wrote:
> Hi,
> I have this in my rpi.dts file:
> spi0 {
> rfid0 {
> compatible = “rfid,mfrc5”;
> spi-chipselect = <0>;
> reset {
> compatible = “pcd-reset”;
> gpios = <&gpio 22 2>;
> };
> };
>
> my mfrc5 driver is starting to work - i can load, open, ioctl, unload,
> but after much grepping, I can’t figure out how from inside the
> driver i can access the reset pin - which i have defined as gpio 22
> ofwdump -aP
>
> # ofwdump -aP
> ...
> Node 0x13c4: spi0
> compatible:
> 62 72 6f 61 64 63 6f 6d 2c 62 63 6d 32 38 33 35 2d 73 70 69
> 00 62 72 6f 61 64 63 6f 6d 2c 62 63 6d 32 37 30 38 2d 73 70
> 69 00
> reg:
> 00 20 40 00 00 00 00 20
> interrupts:
> 00 00 00 3e
> interrupt-parent:
> 00 00 00 01
> Node 0x143c: rfid0
> compatible:
> 72 66 69 64 2c 6d 66 72 63 35 00
> 'rfid,mfrc5'
> spi-chipselect:
> 00 00 00 00
> Node 0x1470: reset
> compatible:
> 70 63 64 2d 72 65 73 65 74 00
> 'pcd-reset'
> gpios:
> 00 00 00 03 00 00 00 16 00 00 00 02
>
> thanks,
> danny
>
Hello,
I think following could help - I am forwarding what was given to me in
similar circumstances :)
http://pastebin.com/4mbZFuv1
Regards,
Milan
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