mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 02:38:56 +00:00
eced5a7eb4
Due to introducing the new peripheral clock handle functions, use these functions to clean up the duplicated code. Meanwhile, remove unneeded header file include, at91_pmc.h. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Tested-by: Heiko Schocher <hs@denx.de> Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com> [fixup for arm920t code] Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/*
|
|
* (C) Copyright 2007-2008
|
|
* Stelian Pop <stelian@popies.net>
|
|
* Lead Tech Design <www.leadtechdesign.com>
|
|
*
|
|
* (C) Copyright 2012
|
|
* Markus Hubig <mhubig@imko.de>
|
|
* IMKO GmbH <www.imko.de>
|
|
*
|
|
* Copyright (C) 2013 DENX Software Engineering, hs@denx.de
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <linux/sizes.h>
|
|
#include <asm/arch/at91_rstc.h>
|
|
#include <watchdog.h>
|
|
|
|
void at91_phy_reset(void)
|
|
{
|
|
unsigned long erstl;
|
|
unsigned long start = get_timer(0);
|
|
unsigned long const timeout = 1000; /* 1000ms */
|
|
at91_rstc_t *rstc = (at91_rstc_t *)ATMEL_BASE_RSTC;
|
|
|
|
erstl = readl(&rstc->mr) & AT91_RSTC_MR_ERSTL_MASK;
|
|
|
|
/*
|
|
* Need to reset PHY -> 500ms reset
|
|
* Reset PHY by pulling the NRST line for 500ms to low. To do so
|
|
* disable user reset for low level on NRST pin and poll the NRST
|
|
* level in reset status register.
|
|
*/
|
|
writel(AT91_RSTC_KEY | AT91_RSTC_MR_ERSTL(0x0D) |
|
|
AT91_RSTC_MR_URSTEN, &rstc->mr);
|
|
|
|
writel(AT91_RSTC_KEY | AT91_RSTC_CR_EXTRST, &rstc->cr);
|
|
|
|
/* Wait for end of hardware reset */
|
|
while (!(readl(&rstc->sr) & AT91_RSTC_SR_NRSTL)) {
|
|
/* avoid shutdown by watchdog */
|
|
WATCHDOG_RESET();
|
|
mdelay(10);
|
|
|
|
/* timeout for not getting stuck in an endless loop */
|
|
if (get_timer(start) >= timeout) {
|
|
puts("*** ERROR: Timeout waiting for PHY reset!\n");
|
|
break;
|
|
}
|
|
};
|
|
|
|
/* Restore NRST value */
|
|
writel(AT91_RSTC_KEY | erstl | AT91_RSTC_MR_URSTEN, &rstc->mr);
|
|
}
|