diff options
Diffstat (limited to '')
-rw-r--r-- | drivers/clk/mxs/clk.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/clk/mxs/clk.c b/drivers/clk/mxs/clk.c new file mode 100644 index 000000000..2fe78ba99 --- /dev/null +++ b/drivers/clk/mxs/clk.c @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright 2012 Freescale Semiconductor, Inc. + */ + +#include <linux/err.h> +#include <linux/io.h> +#include <linux/jiffies.h> +#include <linux/spinlock.h> +#include "clk.h" + +DEFINE_SPINLOCK(mxs_lock); + +int mxs_clk_wait(void __iomem *reg, u8 shift) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(10); + + while (readl_relaxed(reg) & (1 << shift)) + if (time_after(jiffies, timeout)) + return -ETIMEDOUT; + + return 0; +} |