'\" t
.\"     Title: clk_round_rate
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Clock Framework
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "CLK_ROUND_RATE" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Clock Framework"
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.SH "NAME"
clk_round_rate \- adjust a rate to the exact rate a clock can provide
.SH "SYNOPSIS"
.HP \w'long\ clk_round_rate('u
.BI "long clk_round_rate(struct\ clk\ *\ " "clk" ", unsigned\ long\ " "rate" ");"
.SH "ARGUMENTS"
.PP
\fIclk\fR
.RS 4
clock source
.RE
.PP
\fIrate\fR
.RS 4
desired clock rate in Hz
.RE
.SH "DESCRIPTION"
.PP
This answers the question
\(lqif I were to pass \fIrate\fR to \fBclk_set_rate\fR, what clock rate would I end up with?\(rq
without changing the hardware in any way\&. In other words:
.PP
rate = clk_round_rate(clk, r);
.PP
and:
.PP
clk_set_rate(clk, r); rate = clk_get_rate(clk);
.PP
are equivalent except the former does not modify the clock hardware in any way\&.
.PP
Returns rounded clock rate in Hz, or negative errno\&.
.SH "COPYRIGHT"
.br