Date: Thu, 12 Nov 1998 14:44:54 -0800 From: Mike Smith <mike@smith.net.au> To: Nicolas Souchu <nsouch@teaser.fr> Cc: Ron Klinkien <root@zappa.demon.nl>, freebsd-hackers@FreeBSD.ORG, Marc Bouget <mbouget@club-internet.fr> Subject: Re: i2c projects Message-ID: <199811122244.OAA01308@dingo.cdrom.com> In-Reply-To: Your message of "Fri, 13 Nov 1998 00:17:48 GMT." <19981113001748.14820@breizh.prism.uvsq.fr>
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> Now, you want to write user/kernel code? If you need kernel code which is
> uncertain, /sys/dev/iicbus/iic.c will be a good start. Read, copy and
> modify it as needed.
>
> For userland code, you'll have to add your devices in /sys/dev/iicbus/iic.c:
>
> { "iic", IICBUS_DEVICE_CLASS, "MY DEVICE IDENTIFIER", MY_DEVICE_ADDRESS},
>
> like this (for each device on you I2C bus):
>
> /*
> * list of known devices
> */
> struct iicbus_device iicbus_children[] = {
> { "iicsmb", IICBUS_DRIVER_CLASS, "I2C to SMB bridge" },
> { "iic", IICBUS_DEVICE_CLASS, "MY DEVICE IDENTIFIER", MY_DEVICE_ADDRESS},
> { "iic", IICBUS_DEVICE_CLASS, "PCF8574 I2C to 8 bits parallel i/o", 64},
> { "iic", IICBUS_DEVICE_CLASS, "PCF8584 as slave", PCF_MASTER_ADDRESS },
> { "ic", IICBUS_DEVICE_CLASS, "network interface", PCF_MASTER_ADDRESS },
> #if 0
> { "iic", IICBUS_DRIVER_CLASS, "General Call", I2C_GENERAL_CALL },
> #endif
> { NULL, 0 }
> };
Hmm. Is this just for devices in the kernel? You probably want to
make this extensible, eg. with a (de)registration function so that
other consumers can register stuff they know about.
--
\\ Sometimes you're ahead, \\ Mike Smith
\\ sometimes you're behind. \\ mike@smith.net.au
\\ The race is long, and in the \\ msmith@freebsd.org
\\ end it's only with yourself. \\ msmith@cdrom.com
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