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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2007-2008
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* Stelian Pop <stelian@popies.net>
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* Lead Tech Design <www.leadtechdesign.com>
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*
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* (C) Copyright 2012
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* Markus Hubig <mhubig@imko.de>
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* IMKO GmbH <www.imko.de>
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*
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* Copyright (C) 2013 DENX Software Engineering, hs@denx.de
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*/
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#include <common.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <linux/delay.h>
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#include <linux/sizes.h>
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#include <asm/arch/at91_rstc.h>
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#include <watchdog.h>
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void at91_phy_reset(void)
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{
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unsigned long erstl;
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unsigned long start = get_timer(0);
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unsigned long const timeout = 1000; /* 1000ms */
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at91_rstc_t *rstc = (at91_rstc_t *)ATMEL_BASE_RSTC;
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erstl = readl(&rstc->mr) & AT91_RSTC_MR_ERSTL_MASK;
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/*
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* Need to reset PHY -> 500ms reset
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* Reset PHY by pulling the NRST line for 500ms to low. To do so
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* disable user reset for low level on NRST pin and poll the NRST
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* level in reset status register.
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*/
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writel(AT91_RSTC_KEY | AT91_RSTC_MR_ERSTL(0x0D) |
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AT91_RSTC_MR_URSTEN, &rstc->mr);
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writel(AT91_RSTC_KEY | AT91_RSTC_CR_EXTRST, &rstc->cr);
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/* Wait for end of hardware reset */
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while (!(readl(&rstc->sr) & AT91_RSTC_SR_NRSTL)) {
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/* avoid shutdown by watchdog */
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schedule();
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mdelay(10);
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/* timeout for not getting stuck in an endless loop */
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if (get_timer(start) >= timeout) {
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puts("*** ERROR: Timeout waiting for PHY reset!\n");
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break;
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}
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};
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/* Restore NRST value */
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writel(AT91_RSTC_KEY | erstl | AT91_RSTC_MR_URSTEN, &rstc->mr);
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}
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