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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * (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
- */
- #include <common.h>
- #include <init.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;
- }
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