diff options
author | Shawn Guo <shawn.guo@linaro.org> | 2012-04-28 16:02:34 (GMT) |
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committer | Shawn Guo <shawn.guo@linaro.org> | 2012-05-08 16:02:35 (GMT) |
commit | 23b5e15a2994fb0c1444f92b76f09a482f32843c (patch) | |
tree | 54695e5b39977bd1ed04dfd945c9052a85b57e0f /drivers/clk/mxs/clk.c | |
parent | d48b97b403d23f6df0b990cee652bdf9a52337a3 (diff) | |
download | linux-fsl-qoriq-23b5e15a2994fb0c1444f92b76f09a482f32843c.tar.xz |
clk: mxs: add mxs specific clocks
Add mxs specific clocks, pll, reference clock (PFD), integer divider
and fractional divider.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Diffstat (limited to 'drivers/clk/mxs/clk.c')
-rw-r--r-- | drivers/clk/mxs/clk.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/clk/mxs/clk.c b/drivers/clk/mxs/clk.c new file mode 100644 index 0000000..b24d560 --- /dev/null +++ b/drivers/clk/mxs/clk.c @@ -0,0 +1,28 @@ +/* + * Copyright 2012 Freescale Semiconductor, Inc. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/err.h> +#include <linux/io.h> +#include <linux/jiffies.h> +#include <linux/spinlock.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; +} |