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From 2beaa601c849e72683a2dd0fe6fd77763f19f051 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime.ripard@free-electrons.com>
Date: Fri, 30 Sep 2016 22:16:51 +0200
Subject: clk: sunxi-ng: Implement minimum for multipliers
Allow the CCU drivers to specify a multiplier for their clocks.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
---
drivers/clk/sunxi-ng/ccu_mult.c | 2 +-
drivers/clk/sunxi-ng/ccu_mult.h | 13 +++++++++----
drivers/clk/sunxi-ng/ccu_nk.c | 8 ++++----
drivers/clk/sunxi-ng/ccu_nkm.c | 8 ++++----
drivers/clk/sunxi-ng/ccu_nkmp.c | 4 ++--
drivers/clk/sunxi-ng/ccu_nm.c | 2 +-
6 files changed, 21 insertions(+), 16 deletions(-)
--- a/drivers/clk/sunxi-ng/ccu_mult.c
+++ b/drivers/clk/sunxi-ng/ccu_mult.c
@@ -105,7 +105,7 @@ static int ccu_mult_set_rate(struct clk_
ccu_mux_helper_adjust_parent_for_prediv(&cm->common, &cm->mux, -1,
&parent_rate);
- _cm.min = 1;
+ _cm.min = cm->mult.min;
_cm.max = 1 << cm->mult.width;
ccu_mult_find_best(parent_rate, rate, &_cm);
--- a/drivers/clk/sunxi-ng/ccu_mult.h
+++ b/drivers/clk/sunxi-ng/ccu_mult.h
@@ -7,14 +7,19 @@
struct ccu_mult_internal {
u8 shift;
u8 width;
+ u8 min;
};
-#define _SUNXI_CCU_MULT(_shift, _width) \
- { \
- .shift = _shift, \
- .width = _width, \
+#define _SUNXI_CCU_MULT_MIN(_shift, _width, _min) \
+ { \
+ .shift = _shift, \
+ .width = _width, \
+ .min = _min, \
}
+#define _SUNXI_CCU_MULT(_shift, _width) \
+ _SUNXI_CCU_MULT_MIN(_shift, _width, 1)
+
struct ccu_mult {
u32 enable;
--- a/drivers/clk/sunxi-ng/ccu_nk.c
+++ b/drivers/clk/sunxi-ng/ccu_nk.c
@@ -97,9 +97,9 @@ static long ccu_nk_round_rate(struct clk
if (nk->common.features & CCU_FEATURE_FIXED_POSTDIV)
rate *= nk->fixed_post_div;
- _nk.min_n = 1;
+ _nk.min_n = nk->n.min;
_nk.max_n = 1 << nk->n.width;
- _nk.min_k = 1;
+ _nk.min_k = nk->k.min;
_nk.max_k = 1 << nk->k.width;
ccu_nk_find_best(*parent_rate, rate, &_nk);
@@ -122,9 +122,9 @@ static int ccu_nk_set_rate(struct clk_hw
if (nk->common.features & CCU_FEATURE_FIXED_POSTDIV)
rate = rate * nk->fixed_post_div;
- _nk.min_n = 1;
+ _nk.min_n = nk->n.min;
_nk.max_n = 1 << nk->n.width;
- _nk.min_k = 1;
+ _nk.min_k = nk->k.min;
_nk.max_k = 1 << nk->k.width;
ccu_nk_find_best(parent_rate, rate, &_nk);
--- a/drivers/clk/sunxi-ng/ccu_nkm.c
+++ b/drivers/clk/sunxi-ng/ccu_nkm.c
@@ -100,9 +100,9 @@ static unsigned long ccu_nkm_round_rate(
struct ccu_nkm *nkm = data;
struct _ccu_nkm _nkm;
- _nkm.min_n = 1;
+ _nkm.min_n = nkm->n.min;
_nkm.max_n = 1 << nkm->n.width;
- _nkm.min_k = 1;
+ _nkm.min_k = nkm->k.min;
_nkm.max_k = 1 << nkm->k.width;
_nkm.min_m = 1;
_nkm.max_m = nkm->m.max ?: 1 << nkm->m.width;
@@ -129,9 +129,9 @@ static int ccu_nkm_set_rate(struct clk_h
unsigned long flags;
u32 reg;
- _nkm.min_n = 1;
+ _nkm.min_n = nkm->n.min;
_nkm.max_n = 1 << nkm->n.width;
- _nkm.min_k = 1;
+ _nkm.min_k = nkm->k.min;
_nkm.max_k = 1 << nkm->k.width;
_nkm.min_m = 1;
_nkm.max_m = nkm->m.max ?: 1 << nkm->m.width;
--- a/drivers/clk/sunxi-ng/ccu_nkmp.c
+++ b/drivers/clk/sunxi-ng/ccu_nkmp.c
@@ -107,9 +107,9 @@ static long ccu_nkmp_round_rate(struct c
struct ccu_nkmp *nkmp = hw_to_ccu_nkmp(hw);
struct _ccu_nkmp _nkmp;
- _nkmp.min_n = 1;
+ _nkmp.min_n = nkmp->n.min;
_nkmp.max_n = 1 << nkmp->n.width;
- _nkmp.min_k = 1;
+ _nkmp.min_k = nkmp->k.min;
_nkmp.max_k = 1 << nkmp->k.width;
_nkmp.min_m = 1;
_nkmp.max_m = nkmp->m.max ?: 1 << nkmp->m.width;
--- a/drivers/clk/sunxi-ng/ccu_nm.c
+++ b/drivers/clk/sunxi-ng/ccu_nm.c
@@ -93,7 +93,7 @@ static long ccu_nm_round_rate(struct clk
struct ccu_nm *nm = hw_to_ccu_nm(hw);
struct _ccu_nm _nm;
- _nm.min_n = 1;
+ _nm.min_n = nm->n.min;
_nm.max_n = 1 << nm->n.width;
_nm.min_m = 1;
_nm.max_m = nm->m.max ?: 1 << nm->m.width;
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