clk: sunxi: add correct divider table for sun4i-apb0 clock

The sun4i-apb0 clock, as found on all platforms using it, is a
power-of-two-based divider clock, with a special divider of 2
for value 0.

This was causing the clock framework to incorrectly calculate
the clock rate for apb1 and related modules on sun6i and sun8i.
On sun[4/5/7]i, u-boot SPL configures the divider with value 1
for /2 divider, so no suprises there.

This patch adds a proper divider table for it, so the correct
clock rate can be calculated.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
index b654b7b1d137..2cf6581329a6 100644
--- a/drivers/clk/sunxi/clk-sunxi.c
+++ b/drivers/clk/sunxi/clk-sunxi.c
@@ -762,10 +762,19 @@ static const struct div_data sun4i_ahb_data __initconst = {
         .width  = 2,
 };
 
+static const struct clk_div_table sun4i_apb0_table[] __initconst = {
+        { .val = 0, .div = 2 },
+        { .val = 1, .div = 2 },
+        { .val = 2, .div = 4 },
+        { .val = 3, .div = 8 },
+        { } /* sentinel */
+};
+
 static const struct div_data sun4i_apb0_data __initconst = {
         .shift  = 8,
         .pow    = 1,
         .width  = 2,
+        .table  = sun4i_apb0_table,
 };
 
 static const struct div_data sun6i_a31_apb2_div_data __initconst = {