1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Copyright (C) 2011 by Marcin Bukat
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
20 ****************************************************************************/
25 /* rockchip rk27xx driver for the kernel timer */
33 call_tick_tasks(); /* Run through the list of tick tasks */
36 /* this assumes 50MHz APB bus frequency */
37 void tick_start(unsigned int interval_in_ms
)
39 unsigned int cycles
= 50000 * interval_in_ms
;
41 /* enable timer clock */
42 SCU_CLKCFG
&= ~(1<<28);
44 /* configure timer0 */
46 TMR0CON
= (1<<8) | (1<<7) | (1<<1); /* periodic, 1/1, interrupt enable */
48 /* unmask timer0 interrupt */
51 /* enable timer0 interrupt */