'\" t
.\"     Title: z8530_interrupt
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: July 2017
.\"    Manual: Public Functions Provided
.\"    Source: Kernel Hackers Manual 4.11.6
.\"  Language: English
.\"
.TH "Z8530_INTERRUPT" "9" "July 2017" "Kernel Hackers Manual 4\&.11\&" "Public Functions Provided"
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.SH "NAME"
z8530_interrupt \- Handle an interrupt from a Z8530
.SH "SYNOPSIS"
.HP \w'irqreturn_t\ z8530_interrupt('u
.BI "irqreturn_t z8530_interrupt(int\ " "irq" ", void\ *\ " "dev_id" ");"
.SH "ARGUMENTS"
.PP
\fIint irq\fR
.RS 4
Interrupt number
.RE
.PP
\fIvoid * dev_id\fR
.RS 4
The Z8530 device that is interrupting\&.
.RE
.SH "DESCRIPTION"
.PP
A Z85[2]30 device has stuck its hand in the air for attention\&. We scan both the channels on the chip for events and then call the channel specific call backs for each channel that has events\&. We have to use callback functions because the two channels can be in different modes\&.
.PP
Locking is done for the handlers\&. Note that locking is done at the chip level (the 5uS delay issue is per chip not per channel)\&. c\->lock for both channels points to dev\->lock
.SH "AUTHOR"
.PP
\fBAlan Cox\fR <\&alan@lxorguk.ukuu.org.uk\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br