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drivers
pps
sysfs.c
Go to the documentation of this file.
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/*
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* PPS sysfs support
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*
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*
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* Copyright (C) 2007-2009 Rodolfo Giometti <
[email protected]
>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <
linux/pps_kernel.h
>
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/*
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* Attribute functions
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*/
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static
ssize_t
pps_show_assert(
struct
device
*
dev
,
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struct
device_attribute
*
attr
,
char
*
buf
)
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{
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struct
pps_device
*pps =
dev_get_drvdata
(dev);
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if
(!(pps->
info
.mode &
PPS_CAPTUREASSERT
))
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return
0;
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return
sprintf
(buf,
"%lld.%09d#%d\n"
,
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(
long
long
) pps->
assert_tu
.sec, pps->
assert_tu
.nsec,
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pps->
assert_sequence
);
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}
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static
ssize_t
pps_show_clear(
struct
device
*dev,
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struct
device_attribute
*attr,
char
*buf)
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{
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struct
pps_device
*pps =
dev_get_drvdata
(dev);
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if
(!(pps->
info
.mode &
PPS_CAPTURECLEAR
))
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return
0;
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return
sprintf
(buf,
"%lld.%09d#%d\n"
,
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(
long
long
) pps->
clear_tu
.sec, pps->
clear_tu
.nsec,
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pps->
clear_sequence
);
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}
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static
ssize_t
pps_show_mode(
struct
device
*dev,
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struct
device_attribute
*attr,
char
*buf)
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{
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struct
pps_device
*pps =
dev_get_drvdata
(dev);
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return
sprintf
(buf,
"%4x\n"
, pps->
info
.mode);
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}
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static
ssize_t
pps_show_echo(
struct
device
*dev,
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struct
device_attribute
*attr,
char
*buf)
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{
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struct
pps_device
*pps =
dev_get_drvdata
(dev);
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return
sprintf
(buf,
"%d\n"
, !!pps->
info
.echo);
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}
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static
ssize_t
pps_show_name(
struct
device
*dev,
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struct
device_attribute
*attr,
char
*buf)
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{
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struct
pps_device
*pps =
dev_get_drvdata
(dev);
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return
sprintf
(buf,
"%s\n"
, pps->
info
.name);
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}
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static
ssize_t
pps_show_path(
struct
device
*dev,
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struct
device_attribute
*attr,
char
*buf)
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{
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struct
pps_device
*pps =
dev_get_drvdata
(dev);
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return
sprintf
(buf,
"%s\n"
, pps->
info
.path);
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}
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struct
device_attribute
pps_attrs
[] = {
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__ATTR
(
assert
,
S_IRUGO
, pps_show_assert,
NULL
),
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__ATTR
(
clear
,
S_IRUGO
, pps_show_clear,
NULL
),
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__ATTR
(
mode
,
S_IRUGO
, pps_show_mode,
NULL
),
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__ATTR
(
echo
,
S_IRUGO
, pps_show_echo,
NULL
),
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__ATTR
(
name
,
S_IRUGO
, pps_show_name,
NULL
),
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__ATTR
(
path
,
S_IRUGO
, pps_show_path,
NULL
),
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__ATTR_NULL
,
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};
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