'\" t
.\"     Title: regulator_get_optional
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: API reference
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "REGULATOR_GET_OPTION" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "API reference"
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.SH "NAME"
regulator_get_optional \- obtain optional access to a regulator\&.
.SH "SYNOPSIS"
.HP \w'struct\ regulator\ *\ regulator_get_optional('u
.BI "struct regulator * regulator_get_optional(struct\ device\ *\ " "dev" ", const\ char\ *\ " "id" ");"
.SH "ARGUMENTS"
.PP
\fIdev\fR
.RS 4
device for regulator
\(lqconsumer\(rq
.RE
.PP
\fIid\fR
.RS 4
Supply name or regulator ID\&.
.RE
.SH "DESCRIPTION"
.PP
Returns a struct regulator corresponding to the regulator producer, or
\fBIS_ERR\fR
condition containing errno\&.
.PP
This is intended for use by consumers for devices which can have some supplies unconnected in normal use, such as some MMC devices\&. It can allow the regulator core to provide stub supplies for other supplies requested using normal
\fBregulator_get\fR
calls without disrupting the operation of drivers that can handle absent supplies\&.
.PP
Use of supply names configured via
\fBregulator_set_device_supply\fR
is strongly encouraged\&. It is recommended that the supply name used should match the name used for the supply and/or the relevant device pins in the datasheet\&.
.SH "AUTHORS"
.PP
\fBLiam Girdwood\fR <\&lrg@slimlogic.co.uk\&>
.RS 4
Author.
.RE
.PP
\fBMark Brown\fR <\&broonie@opensource.wolfsonmicro.com\&>
.br
Wolfson Microelectronics, 
      
     
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br