'\" t
.\"     Title: spi_read
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Serial Peripheral Interface (SPI)
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "SPI_READ" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Serial Peripheral Interface (S"
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.SH "NAME"
spi_read \- SPI synchronous read
.SH "SYNOPSIS"
.HP \w'int\ spi_read('u
.BI "int spi_read(struct\ spi_device\ *\ " "spi" ", void\ *\ " "buf" ", size_t\ " "len" ");"
.SH "ARGUMENTS"
.PP
\fIspi\fR
.RS 4
device from which data will be read
.RE
.PP
\fIbuf\fR
.RS 4
data buffer
.RE
.PP
\fIlen\fR
.RS 4
data buffer size
.RE
.SH "CONTEXT"
.PP
can sleep
.SH "DESCRIPTION"
.PP
This function reads the buffer
\fIbuf\fR\&. Callable only from contexts that can sleep\&.
.SH "RETURN"
.PP
zero on success, else a negative error code\&.
.SH "COPYRIGHT"
.br