| gpioiic.4 (56ad49b2605e843817947d3e5fe7433be989d3ef) | gpioiic.4 (d458747eb2ae0e21ab87278d9c3888336ce83633) |
|---|---|
| 1.\" Copyright (c) 2013, Luiz Otavio O Souza <loos@FreeBSD.org> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 47 unchanged lines hidden (view full) --- 56.Nm 57simulates an open collector kind of output when managing the pins on the 58bus, even on systems which don't directly support configuring gpio pins 59in that mode. 60The pins are never driven to the logical value of '1'. 61They are driven to '0' or switched to input mode (Hi-Z/tri-state), and 62an external pullup resistor pulls the line to the 1 state unless some 63other device on the bus is driving it to 0. | 1.\" Copyright (c) 2013, Luiz Otavio O Souza <loos@FreeBSD.org> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 47 unchanged lines hidden (view full) --- 56.Nm 57simulates an open collector kind of output when managing the pins on the 58bus, even on systems which don't directly support configuring gpio pins 59in that mode. 60The pins are never driven to the logical value of '1'. 61They are driven to '0' or switched to input mode (Hi-Z/tri-state), and 62an external pullup resistor pulls the line to the 1 state unless some 63other device on the bus is driving it to 0. |
| 64.Pp | |
| 65.Sh HINTS CONFIGURATION 66On a 67.Xr device.hints 5 68based system, such as MIPS, these values are configurable for 69.Nm : 70.Bl -tag -width ".Va hint.gpioiic.%d.atXXX" 71.It Va hint.gpioiic.%d.at 72The --- 87 unchanged lines hidden --- | 64.Sh HINTS CONFIGURATION 65On a 66.Xr device.hints 5 67based system, such as MIPS, these values are configurable for 68.Nm : 69.Bl -tag -width ".Va hint.gpioiic.%d.atXXX" 70.It Va hint.gpioiic.%d.at 71The --- 87 unchanged lines hidden --- |