cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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clk.c (468B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Copyright 2012 Freescale Semiconductor, Inc.
      4 */
      5
      6#include <linux/err.h>
      7#include <linux/io.h>
      8#include <linux/jiffies.h>
      9#include <linux/spinlock.h>
     10#include "clk.h"
     11
     12DEFINE_SPINLOCK(mxs_lock);
     13
     14int mxs_clk_wait(void __iomem *reg, u8 shift)
     15{
     16	unsigned long timeout = jiffies + msecs_to_jiffies(10);
     17
     18	while (readl_relaxed(reg) & (1 << shift))
     19		if (time_after(jiffies, timeout))
     20			return -ETIMEDOUT;
     21
     22	return 0;
     23}