clk: divider: Make generic for usage elsewhere

commit bca9690b942654f668ffb5124b2bbd0ba0f007bb Linux upstream adjusted
to current Barebox codebase.

  clk: divider: Make generic for usage elsewhere

  Some devices don't use mmio to interact with dividers. Split out the
  logic from the register read/write parts so that we can reuse the
  division logic elsewhere.

  Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
  Tested-by: Kenneth Westfield <kwestfie@codeaurora.org>
  Signed-off-by: Michael Turquette <mturquette@linaro.org>

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/clk.h b/include/linux/clk.h
index b9c5e0ab04..ed78ffe46c 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -354,6 +354,14 @@ unsigned long divider_recalc_rate(struct clk *clk, unsigned long parent_rate,
 		const struct clk_div_table *table,
 		unsigned long flags, unsigned long width);
 
+long divider_round_rate(struct clk *clk, unsigned long rate,
+			unsigned long *prate, const struct clk_div_table *table,
+			u8 width, unsigned long flags);
+
+int divider_get_val(unsigned long rate, unsigned long parent_rate,
+		    const struct clk_div_table *table, u8 width,
+		    unsigned long flags);
+
 struct clk *clk_divider_alloc(const char *name, const char *parent,
 			      unsigned clk_flags, void __iomem *reg,
 			      u8 shift, u8 width, unsigned div_flags);