drivers/clk/mxs/clk.c

   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
  12 DEFINE_SPINLOCK(mxs_lock);
  13
  14 int 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 }