Date: Fri, 24 Apr 2015 11:00:33 +0300 From: Daniel Braniss <danny@cs.huji.ac.il> To: arm@freebsd.org Subject: FDT help Message-ID: <80F17668-BEF0-42BD-9243-AE41ACAF255E@cs.huji.ac.il>
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Hi,
I have this in my rpi.dts file:
spi0 {
rfid0 {
compatible =3D =E2=80=9Crfid,mfrc5=E2=80=9D;
spi-chipselect =3D <0>;
reset {
compatible =3D =E2=80=9Cpcd-reset=E2=80=9D=
;
gpios =3D <&gpio 22 2>;
};
};
my mfrc5 driver is starting to work - i can load, open, ioctl, unload,
but after much grepping, I can=E2=80=99t 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=20
00 62 72 6f 61 64 63 6f 6d 2c 62 63 6d 32 37 30 38 2d 73 70=20
69 00=20
reg:
00 20 40 00 00 00 00 20=20
interrupts:
00 00 00 3e=20
interrupt-parent:
00 00 00 01=20
Node 0x143c: rfid0
compatible:
72 66 69 64 2c 6d 66 72 63 35 00=20
'rfid,mfrc5'
spi-chipselect:
00 00 00 00=20
Node 0x1470: reset
compatible:
70 63 64 2d 72 65 73 65 74 00=20
'pcd-reset'
gpios:
00 00 00 03 00 00 00 16 00 00 00 02=20
thanks,
danny
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