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https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
56 lines
1.4 KiB
C
56 lines
1.4 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/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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WATCHDOG_RESET();
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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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