diff options
| author | Jonas Gorski <jonas.gorski@gmail.com> | 2019-04-18 14:12:05 +0300 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2019-04-23 20:57:48 +0300 |
| commit | 58a2b4c9bdf98452fec95bb1a5eeed60c01f621a (patch) | |
| tree | e06cbcfd3d31c29777a948ac83baa2375bf418ae /drivers/clk/clk-fractional-divider.c | |
| parent | 434d69fad63b443d7afc8aa99264359c9b4e2d3a (diff) | |
| download | linux-58a2b4c9bdf98452fec95bb1a5eeed60c01f621a.tar.xz | |
clk: fractional-divider: add explicit big endian support
Add a clock specific flag to switch register accesses to big endian, to
allow runtime configuration of big endian fractional divider clocks.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.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, 19 insertions, 3 deletions
diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractional-divider.c index fdfe2e423d15..f88df265e787 100644 --- a/drivers/clk/clk-fractional-divider.c +++ b/drivers/clk/clk-fractional-divider.c @@ -13,6 +13,22 @@ #include <linux/slab.h> #include <linux/rational.h> +static inline u32 clk_fd_readl(struct clk_fractional_divider *fd) +{ + if (fd->flags & CLK_FRAC_DIVIDER_BIG_ENDIAN) + return ioread32be(fd->reg); + + return clk_readl(fd->reg); +} + +static inline void clk_fd_writel(struct clk_fractional_divider *fd, u32 val) +{ + if (fd->flags & CLK_FRAC_DIVIDER_BIG_ENDIAN) + iowrite32be(val, fd->reg); + else + clk_writel(val, fd->reg); +} + static unsigned long clk_fd_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { @@ -27,7 +43,7 @@ static unsigned long clk_fd_recalc_rate(struct clk_hw *hw, else __acquire(fd->lock); - val = clk_readl(fd->reg); + val = clk_fd_readl(fd); if (fd->lock) spin_unlock_irqrestore(fd->lock, flags); @@ -115,10 +131,10 @@ static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate, else __acquire(fd->lock); - val = clk_readl(fd->reg); + val = clk_fd_readl(fd); val &= ~(fd->mmask | fd->nmask); val |= (m << fd->mshift) | (n << fd->nshift); - clk_writel(val, fd->reg); + clk_fd_writel(fd, val); if (fd->lock) spin_unlock_irqrestore(fd->lock, flags); |