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piixpm(4) [netbsd man page]

PIIXPM(4)						   BSD Kernel Interfaces Manual 						 PIIXPM(4)

NAME
piixpm -- Intel PIIX and compatible Power Management controller SYNOPSIS
piixpm* at pci? dev ? function ? iic* at piixpm? DESCRIPTION
The piixpm driver provides support for the Intel PIIX and compatible Power Management controller. Only the SMBus host interface is supported and can be used with the iic(4) framework. Supported chipsets: o ATI SB200, SB300, SB400, SB600, SB700, SB800 o Intel 82371AB (PIIX4), 82440MX o Serverworks OSB4, OSB5, OSB6, HT1000SB SEE ALSO
iic(4), intro(4), pci(4) HISTORY
The piixpm driver first appeared in OpenBSD 3.9 and then in NetBSD 4.0. AUTHORS
The current piixpm driver was written by Alexander Yurchenko <grange@openbsd.org>. It was ported to NetBSD by Jared D. McNeill <jmcneill@netbsd.org>. BUGS
The driver doesn't support I2C commands with a data buffer size of more than 2 bytes. BSD
March 26, 2008 BSD

Check Out this Related Man Page

GPIOIIC(4)						   BSD Kernel Interfaces Manual 						GPIOIIC(4)

NAME
gpioiic -- GPIO I2C controller SYNOPSIS
gpioiic* at gpio? offset 0 mask 0x3 flag 0x0 gpioiic* at gpio? iic* at gpioiic? DESCRIPTION
The gpioiic driver allows bit-banging an I2C bus as a master using two GPIO pins. By default the first pin is used as a serial data (SDA) signal and the second as a serial clock (SCL). If the flag locator is set to 0x01, the order of the SDA and SCL signals is reversed. Both GPIO pins must be able to drive an output and the SDA pin must be also able to read an input. The pins can be specified in the kernel configuration with the offset and the mask locators. The offset and mask can also be specified when gpioiic is attached at runtime using the GPIOATTACH ioctl(2) on the gpio(4) device. Each bit in the mask locator defines one pin; the pin number is calculated as an addition of the bit position and the offset locator. For example, offset 17 and mask 0x5 defines pin numbers 17 and 19. SEE ALSO
gpio(4), iic(4), intro(4) HISTORY
The gpioiic driver first appeared in OpenBSD 3.9 and NetBSD 5.0. AUTHORS
The gpioiic driver was written by Alexander Yurchenko <grange@openbsd.org> and was ported to NetBSD by Marc Balmer <marc@msys.ch>. CAVEATS
A gpioiic device can not be detached from the gpio(4) bus at runtime due to the fact that iic(4) busses can not detach once attached. BSD
October 2, 2011 BSD
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