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https://github.com/brain-hackers/u-boot-brain
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d024236e5a
We have a large number of places where while we historically referenced gd in the code we no longer do, as well as cases where the code added that line "just in case" during development and never dropped it. Signed-off-by: Tom Rini <trini@konsulko.com>
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*
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* (C) Copyright 2007
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* Sascha Hauer, Pengutronix
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/arch/imx-regs.h>
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#include <asm/io.h>
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#define TIMER_BASE 0x53f90000 /* General purpose timer 1 */
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/* General purpose timers registers */
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#define GPTCR __REG(TIMER_BASE) /* Control register */
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#define GPTPR __REG(TIMER_BASE + 0x4) /* Prescaler register */
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#define GPTSR __REG(TIMER_BASE + 0x8) /* Status register */
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#define GPTCNT __REG(TIMER_BASE + 0x24) /* Counter register */
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/* General purpose timers bitfields */
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#define GPTCR_SWR (1 << 15) /* Software reset */
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#define GPTCR_FRR (1 << 9) /* Freerun / restart */
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#define GPTCR_CLKSOURCE_32 (4 << 6) /* Clock source */
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#define GPTCR_TEN 1 /* Timer enable */
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/* The 32768Hz 32-bit timer overruns in 131072 seconds */
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int timer_init(void)
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{
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int i;
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/* setup GP Timer 1 */
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GPTCR = GPTCR_SWR;
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for (i = 0; i < 100; i++)
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GPTCR = 0; /* We have no udelay by now */
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GPTPR = 0; /* 32Khz */
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/* Freerun Mode, PERCLK1 input */
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GPTCR |= GPTCR_CLKSOURCE_32 | GPTCR_TEN;
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return 0;
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}
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unsigned long timer_read_counter(void)
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{
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return GPTCNT;
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}
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