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authorPriit Laes <plaes@plaes.org>2017-08-12 20:43:50 +0800
committerChen-Yu Tsai <wens@csie.org>2017-08-14 22:31:46 +0800
commit721353c030a0d6f7b5e157dc2531da96b4dd73f3 (patch)
treeb7645acd8bf2fb60f51c4f2cef141851568543ad /drivers/clk/sunxi-ng
parent7e784240bd37f7a963f2a61bd9b85f567150fa58 (diff)
downloadlinux-721353c030a0d6f7b5e157dc2531da96b4dd73f3.tar.bz2
clk: sunxi-ng: div: Add support for fixed post-divider
SATA clock on sun4i/sun7i is of type (parent) / M / 6 where 6 is fixed post-divider. Signed-off-by: Priit Laes <plaes@plaes.org> Signed-off-by: Icenowy Zheng <icenowy@aosc.io> Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Diffstat (limited to 'drivers/clk/sunxi-ng')
-rw-r--r--drivers/clk/sunxi-ng/ccu_div.c22
-rw-r--r--drivers/clk/sunxi-ng/ccu_div.h3
2 files changed, 21 insertions, 4 deletions
diff --git a/drivers/clk/sunxi-ng/ccu_div.c b/drivers/clk/sunxi-ng/ccu_div.c
index c0e5c10d0091..baa3cf96507b 100644
--- a/drivers/clk/sunxi-ng/ccu_div.c
+++ b/drivers/clk/sunxi-ng/ccu_div.c
@@ -21,10 +21,18 @@ static unsigned long ccu_div_round_rate(struct ccu_mux_internal *mux,
{
struct ccu_div *cd = data;
- return divider_round_rate_parent(&cd->common.hw, parent,
+ if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV)
+ rate *= cd->fixed_post_div;
+
+ rate = divider_round_rate_parent(&cd->common.hw, parent,
rate, parent_rate,
cd->div.table, cd->div.width,
cd->div.flags);
+
+ if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV)
+ rate /= cd->fixed_post_div;
+
+ return rate;
}
static void ccu_div_disable(struct clk_hw *hw)
@@ -62,8 +70,13 @@ static unsigned long ccu_div_recalc_rate(struct clk_hw *hw,
parent_rate = ccu_mux_helper_apply_prediv(&cd->common, &cd->mux, -1,
parent_rate);
- return divider_recalc_rate(hw, parent_rate, val, cd->div.table,
- cd->div.flags);
+ val = divider_recalc_rate(hw, parent_rate, val, cd->div.table,
+ cd->div.flags);
+
+ if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV)
+ val /= cd->fixed_post_div;
+
+ return val;
}
static int ccu_div_determine_rate(struct clk_hw *hw,
@@ -86,6 +99,9 @@ static int ccu_div_set_rate(struct clk_hw *hw, unsigned long rate,
parent_rate = ccu_mux_helper_apply_prediv(&cd->common, &cd->mux, -1,
parent_rate);
+ if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV)
+ rate *= cd->fixed_post_div;
+
val = divider_get_val(rate, parent_rate, cd->div.table, cd->div.width,
cd->div.flags);
diff --git a/drivers/clk/sunxi-ng/ccu_div.h b/drivers/clk/sunxi-ng/ccu_div.h
index 08d074451204..f3a5028dcd14 100644
--- a/drivers/clk/sunxi-ng/ccu_div.h
+++ b/drivers/clk/sunxi-ng/ccu_div.h
@@ -86,9 +86,10 @@ struct ccu_div_internal {
struct ccu_div {
u32 enable;
- struct ccu_div_internal div;
+ struct ccu_div_internal div;
struct ccu_mux_internal mux;
struct ccu_common common;
+ unsigned int fixed_post_div;
};
#define SUNXI_CCU_DIV_TABLE_WITH_GATE(_struct, _name, _parent, _reg, \