diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2022-11-22 16:07:30 +0300 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2022-11-23 05:19:38 +0300 |
| commit | 7fffdb777371cbc20929cc648509765e1923937d (patch) | |
| tree | d8cf15ff78b362b3d0a0c6d0986e02832e4fcfe3 /drivers/clk/clk-fractional-divider.c | |
| parent | 9abf2313adc1ca1b6180c508c25f22f9395cc780 (diff) | |
| download | linux-7fffdb777371cbc20929cc648509765e1923937d.tar.xz | |
clk: fractional-divider: Split out clk_fd_get_div() helper
Split out clk_fd_get_div() helper for the future use elsewhere.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221122130732.48537-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk/clk-fractional-divider.c')
| -rw-r--r-- | drivers/clk/clk-fractional-divider.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractional-divider.c index 8efa5142ff8c..5c6f1d0f8fb4 100644 --- a/drivers/clk/clk-fractional-divider.c +++ b/drivers/clk/clk-fractional-divider.c @@ -40,6 +40,7 @@ #include <linux/clk-provider.h> #include <linux/io.h> +#include <linux/math.h> #include <linux/module.h> #include <linux/device.h> #include <linux/slab.h> @@ -63,14 +64,12 @@ static inline void clk_fd_writel(struct clk_fractional_divider *fd, u32 val) writel(val, fd->reg); } -static unsigned long clk_fd_recalc_rate(struct clk_hw *hw, - unsigned long parent_rate) +static void clk_fd_get_div(struct clk_hw *hw, struct u32_fract *fract) { struct clk_fractional_divider *fd = to_clk_fd(hw); unsigned long flags = 0; unsigned long m, n; u32 val; - u64 ret; if (fd->lock) spin_lock_irqsave(fd->lock, flags); @@ -92,11 +91,22 @@ static unsigned long clk_fd_recalc_rate(struct clk_hw *hw, n++; } - if (!n || !m) + fract->numerator = m; + fract->denominator = n; +} + +static unsigned long clk_fd_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) +{ + struct u32_fract fract; + u64 ret; + + clk_fd_get_div(hw, &fract); + + if (!fract.numerator || !fract.denominator) return parent_rate; - ret = (u64)parent_rate * m; - do_div(ret, n); + ret = (u64)parent_rate * fract.numerator; + do_div(ret, fract.denominator); return ret; } |