mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-25 20:43:32 +00:00
3dae5b510e
Convert mx25 to use the commmon timer code. Signed-off-by: Rob Herring <rob.herring@calxeda.com>
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Marius Groeger <mgroeger@sysgo.de>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Alex Zuepke <azu@sysgo.de>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
|
|
*
|
|
* (C) Copyright 2009
|
|
* Ilya Yanok, Emcraft Systems Ltd, <yanok@emcraft.com>
|
|
*
|
|
* (C) Copyright 2009 DENX Software Engineering
|
|
* Author: John Rigby <jrigby@gmail.com>
|
|
* Add support for MX25
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/imx-regs.h>
|
|
|
|
/* nothing really to do with interrupts, just starts up a counter. */
|
|
/* The 32KHz 32-bit timer overruns in 134217 seconds */
|
|
int timer_init(void)
|
|
{
|
|
int i;
|
|
struct gpt_regs *gpt = (struct gpt_regs *)IMX_GPT1_BASE;
|
|
struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE;
|
|
|
|
/* setup GP Timer 1 */
|
|
writel(GPT_CTRL_SWR, &gpt->ctrl);
|
|
|
|
writel(readl(&ccm->cgr1) | CCM_CGR1_GPT1, &ccm->cgr1);
|
|
|
|
for (i = 0; i < 100; i++)
|
|
writel(0, &gpt->ctrl); /* We have no udelay by now */
|
|
writel(0, &gpt->pre); /* prescaler = 1 */
|
|
/* Freerun Mode, 32KHz input */
|
|
writel(readl(&gpt->ctrl) | GPT_CTRL_CLKSOURCE_32 | GPT_CTRL_FRR,
|
|
&gpt->ctrl);
|
|
writel(readl(&gpt->ctrl) | GPT_CTRL_TEN, &gpt->ctrl);
|
|
|
|
return 0;
|
|
}
|