clk: sunxi: factors: Support custom formulas

Some clocks cannot be modelled using the standard factors clk formula,
such as clocks with special pre-dividers on one parent, or clocks
with all power-of-two dividers.

Add support for a custom .recalc callback for factors clk. Also pass
the current parent index to the .get_factor and .recalc callbacks.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/clk/sunxi/clk-factors.h b/drivers/clk/sunxi/clk-factors.h
index f09d7c214533..a44a865a6b9e 100644
--- a/drivers/clk/sunxi/clk-factors.h
+++ b/drivers/clk/sunxi/clk-factors.h
@@ -22,6 +22,7 @@ struct clk_factors_config {
 struct factors_request {
 	unsigned long rate;
 	unsigned long parent_rate;
+	u8 parent_index;
 	u8 n;
 	u8 k;
 	u8 m;
@@ -34,6 +35,7 @@ struct factors_data {
 	int muxmask;
 	const struct clk_factors_config *table;
 	void (*getter)(struct factors_request *req);
+	void (*recalc)(struct factors_request *req);
 	const char *name;
 };
 
@@ -42,6 +44,7 @@ struct clk_factors {
 	void __iomem *reg;
 	const struct clk_factors_config *config;
 	void (*get_factors)(struct factors_request *req);
+	void (*recalc)(struct factors_request *req);
 	spinlock_t *lock;
 	/* for cleanup */
 	struct clk_mux *mux;