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clk: Compute masks for fractional_divider clk when needed. 

There is no real need to pre-compute mmask and nmask when handling
fractional_divider clk.

They can be computed when needed.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/0fd6357242c974259c9e034c6e28a0391c480bf0.1680423909.git.christophe.jaillet@wanadoo.fr
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Christophe JAILLET 2023-04-02 11:42:04 +02:00 committed by Stephen Boyd
parent fe15c26ee2
commit 141b3251c5
1 changed files with 11 additions and 5 deletions
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16
drivers/clk/clk-fractional-divider.c
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@ -71,6 +71,7 @@ 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 mmask, nmask;
u32 val;
if (fd->lock)
@ -85,8 +86,11 @@ static void clk_fd_get_div(struct clk_hw *hw, struct u32_fract *fract)
else
__release(fd->lock);
m = (val & fd->mmask) >> fd->mshift;
n = (val & fd->nmask) >> fd->nshift;
mmask = GENMASK(fd->mwidth - 1, 0) << fd->mshift;
nmask = GENMASK(fd->nwidth - 1, 0) << fd->nshift;
m = (val & mmask) >> fd->mshift;
n = (val & nmask) >> fd->nshift;
if (fd->flags & CLK_FRAC_DIVIDER_ZERO_BASED) {
m++;
@ -166,6 +170,7 @@ static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate,
struct clk_fractional_divider *fd = to_clk_fd(hw);
unsigned long flags = 0;
unsigned long m, n;
u32 mmask, nmask;
u32 val;
rational_best_approximation(rate, parent_rate,
@ -182,8 +187,11 @@ static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate,
else
__acquire(fd->lock);
mmask = GENMASK(fd->mwidth - 1, 0) << fd->mshift;
nmask = GENMASK(fd->nwidth - 1, 0) << fd->nshift;
val = clk_fd_readl(fd);
val &= ~(fd->mmask | fd->nmask);
val &= ~(mmask | nmask);
val |= (m << fd->mshift) | (n << fd->nshift);
clk_fd_writel(fd, val);
@ -260,10 +268,8 @@ struct clk_hw *clk_hw_register_fractional_divider(struct device *dev,
fd->reg = reg;
fd->mshift = mshift;
fd->mwidth = mwidth;
fd->mmask = GENMASK(mwidth - 1, 0) << mshift;
fd->nshift = nshift;
fd->nwidth = nwidth;
fd->nmask = GENMASK(nwidth - 1, 0) << nshift;
fd->flags = clk_divider_flags;
fd->lock = lock;
fd->hw.init = &init;