[PATCH 1/7] clk: sunxi: Add post clk divider for factor clocks

[Chen-Yu Tsai]

Some factor clocks, mostly PLLs, have an extra fixed divider just before
the clock output. Add an option to the factor clk driver config data to
specify this divider.

Signed-off-by: Chen-Yu Tsai <wens at csie.org>
---
 drivers/clk/sunxi/clk-factors.c | 3 +++
 drivers/clk/sunxi/clk-factors.h | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/clk/sunxi/clk-factors.c b/drivers/clk/sunxi/clk-factors.c
index 2057c8a..435111d 100644
--- a/drivers/clk/sunxi/clk-factors.c
+++ b/drivers/clk/sunxi/clk-factors.c
@@ -64,6 +64,9 @@ static unsigned long clk_factors_recalc_rate(struct clk_hw *hw,
 	/* Calculate the rate */
 	rate = (parent_rate * (n + config->n_start) * (k + 1) >> p) / (m + 1);
 
+	if (config->post_div)
+		rate /= config->post_div;
+
 	return rate;
 }
 
diff --git a/drivers/clk/sunxi/clk-factors.h b/drivers/clk/sunxi/clk-factors.h
index d2d0efa..ce70c65 100644
--- a/drivers/clk/sunxi/clk-factors.h
+++ b/drivers/clk/sunxi/clk-factors.h
@@ -16,6 +16,7 @@ struct clk_factors_config {
 	u8 pshift;
 	u8 pwidth;
 	u8 n_start;
+	u8 post_div;
 };
 
 struct clk_factors {
-- 
2.1.0