linux_timer.c File Reference

Source file for Linux timer platform driver. More...

#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "no_os_error.h"
#include "no_os_timer.h"
#include "no_os_alloc.h"

Include dependency graph for linux_timer.c:

Classes
struct	linux_timer_desc
	Linux platform specific timer descriptor. More...

Functions
int	linux_timer_init (struct no_os_timer_desc **desc, const struct no_os_timer_init_param *param)
	Timer driver init function. More...
int	linux_timer_remove (struct no_os_timer_desc *desc)
	Timer driver remove function. More...
int	linux_timer_start (struct no_os_timer_desc *desc)
	Timer count start function. More...
int	linux_timer_stop (struct no_os_timer_desc *desc)
	Timer count stop function. More...
int	linux_timer_counter_get (struct no_os_timer_desc *desc, uint32_t *counter)
	Function to get the current timer counter value. More...
int	linux_timer_counter_set (struct no_os_timer_desc *desc, uint32_t new_val)
	Function to set the timer counter value. More...
int	linux_timer_count_clk_get (struct no_os_timer_desc *desc, uint32_t *freq_hz)
	Function to get the timer frequency. More...
int	linux_timer_count_clk_set (struct no_os_timer_desc *desc, uint32_t freq_hz)
	Function to set the timer frequency. More...
int	linux_timer_get_elapsed_time_nsec (struct no_os_timer_desc *desc, uint64_t *elapsed_time)
	Not implemented. More...

Variables
const struct no_os_timer_platform_ops	linux_timer_ops
	linux platform specific timer platform ops structure More...

Detailed Description

Source file for Linux timer platform driver.

Author

Dragos Bogdan (drago.nosp@m.s.bo.nosp@m.gdan@.nosp@m.anal.nosp@m.og.co.nosp@m.m)

Copyright 2023(c) Analog Devices, Inc.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. Neither the name of Analog Devices, Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES, INC. “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Function Documentation

linux_timer_count_clk_get()

int linux_timer_count_clk_get	(	struct no_os_timer_desc *	desc,
		uint32_t *	freq_hz
	)

Function to get the timer frequency.

Parameters

desc	- timer descriptor
freq_hz	- the timer frequency value

Returns

0 in case of success, -EINVAL otherwise.

linux_timer_count_clk_set()

int linux_timer_count_clk_set	(	struct no_os_timer_desc *	desc,
		uint32_t	freq_hz
	)

Function to set the timer frequency.

Parameters

desc	- timer descriptor.
freq_hz	- the timer frequency value to be set.

Returns

0 in case of success, negative errno error codes otherwise.

linux_timer_counter_get()

int linux_timer_counter_get	(	struct no_os_timer_desc *	desc,
		uint32_t *	counter
	)

Function to get the current timer counter value.

Parameters

desc	- timer descriptor
counter	- the timer counter value

Returns

0 in case of success, -EINVAL otherwise.

linux_timer_counter_set()

int linux_timer_counter_set	(	struct no_os_timer_desc *	desc,
		uint32_t	new_val
	)

Function to set the timer counter value.

Parameters

desc	- timer descriptor
new_val	- timer counter value to be set

Returns

0 in case of success, -EINVAL otherwise.

linux_timer_get_elapsed_time_nsec()

int linux_timer_get_elapsed_time_nsec	(	struct no_os_timer_desc *	desc,
		uint64_t *	elapsed_time
	)

Not implemented.

Parameters

desc	- timer descriptor
elapsed_time	- time in nanoseconds

Returns

0 in case of success, negative errno error codes otherwise.

linux_timer_init()

int linux_timer_init	(	struct no_os_timer_desc **	desc,
		const struct no_os_timer_init_param *	param
	)

Timer driver init function.

Parameters

desc	- timer descriptor to be initialized
param	- initialization parameter for the desc

Returns

0 in case of success, negative errno error codes otherwise.

linux_timer_remove()

int linux_timer_remove

(

struct no_os_timer_desc *

desc

)

Timer driver remove function.

Parameters

desc	- timer descriptor

Returns

0 in case of success, -EINVAL otherwise.

linux_timer_start()

int linux_timer_start

(

struct no_os_timer_desc *

desc

)

Timer count start function.

Parameters

desc	- timer descriptor

Returns

0 in case of success, -EINVAL otherwise.

linux_timer_stop()

int linux_timer_stop

(

struct no_os_timer_desc *

desc

)

Timer count stop function.

Parameters

desc	- timer descriptor

Returns

0 in case of success, -EINVAL otherwise.

Variable Documentation

linux_timer_ops

const struct no_os_timer_platform_ops linux_timer_ops

Initial value:

= {
    .init = (int32_t (*)())linux_timer_init,
    .start = (int32_t (*)())linux_timer_start,
    .stop = (int32_t (*)())linux_timer_stop,
    .counter_get = (int32_t (*)())linux_timer_counter_get,
    .counter_set = (int32_t (*)())linux_timer_counter_set,
    .count_clk_get = (int32_t (*)())linux_timer_count_clk_get,
    .count_clk_set = (int32_t (*)())linux_timer_count_clk_set,
    .get_elapsed_time_nsec =
    (int32_t (*)())linux_timer_get_elapsed_time_nsec,
    .remove = (int32_t (*)())linux_timer_remove
}

linux platform specific timer platform ops structure

Linux specific timer platform ops.