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clk: Change clk_ops->determine_rate to return a clk_hw as the best parent

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This is in preparation for clock providers to not have to deal with struct clk.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
This commit is contained in:
Tomeu Vizoso 2014-12-02 08:54:22 +01:00 committed by Michael Turquette
parent 61c7cddfad
commit 646cafc6aa
14 changed files with 65 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/clk.txt
View File

@ -74,7 +74,7 @@ the operations defined in clk.h:
long (*determine_rate)(struct clk_hw *hw,
unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_clk);
struct clk_hw **best_parent_clk);
int (*set_parent)(struct clk_hw *hw, u8 index);
u8 (*get_parent)(struct clk_hw *hw);
int (*set_rate)(struct clk_hw *hw,

10
arch/mips/alchemy/common/clock.c
View File

@ -375,7 +375,7 @@ static long alchemy_calc_div(unsigned long rate, unsigned long prate,
static long alchemy_clk_fgcs_detr(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_clk,
struct clk_hw **best_parent_clk,
int scale, int maxdiv)
{
struct clk *pc, *bpc, *free;
@ -454,7 +454,7 @@ static long alchemy_clk_fgcs_detr(struct clk_hw *hw, unsigned long rate,
}
*best_parent_rate = bpr;
*best_parent_clk = bpc;
*best_parent_clk = __clk_get_hw(bpc);
return br;
}
@ -548,7 +548,7 @@ static unsigned long alchemy_clk_fgv1_recalc(struct clk_hw *hw,
static long alchemy_clk_fgv1_detr(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_clk)
struct clk_hw **best_parent_clk)
{
return alchemy_clk_fgcs_detr(hw, rate, best_parent_rate,
best_parent_clk, 2, 512);
@ -680,7 +680,7 @@ static unsigned long alchemy_clk_fgv2_recalc(struct clk_hw *hw,
static long alchemy_clk_fgv2_detr(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_clk)
struct clk_hw **best_parent_clk)
{
struct alchemy_fgcs_clk *c = to_fgcs_clk(hw);
int scale, maxdiv;
@ -899,7 +899,7 @@ static int alchemy_clk_csrc_setr(struct clk_hw *hw, unsigned long rate,
static long alchemy_clk_csrc_detr(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_clk)
struct clk_hw **best_parent_clk)
{
struct alchemy_fgcs_clk *c = to_fgcs_clk(hw);
int scale = c->dt[2] == 3 ? 1 : 2; /* au1300 check */

4
drivers/clk/at91/clk-programmable.c
View File

@ -57,7 +57,7 @@ static unsigned long clk_programmable_recalc_rate(struct clk_hw *hw,
static long clk_programmable_determine_rate(struct clk_hw *hw,
unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_clk)
struct clk_hw **best_parent_hw)
{
struct clk *parent = NULL;
long best_rate = -EINVAL;
@ -84,7 +84,7 @@ static long clk_programmable_determine_rate(struct clk_hw *hw,
if (best_rate < 0 || (rate - tmp_rate) < (rate - best_rate)) {
best_rate = tmp_rate;
*best_parent_rate = parent_rate;
*best_parent_clk = parent;
*best_parent_hw = __clk_get_hw(parent);
}
if (!best_rate)

4
drivers/clk/bcm/clk-kona.c
View File

@ -1032,7 +1032,7 @@ static long kona_peri_clk_round_rate(struct clk_hw *hw, unsigned long rate,
}
static long kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate, struct clk **best_parent)
unsigned long *best_parent_rate, struct clk_hw **best_parent)
{
struct kona_clk *bcm_clk = to_kona_clk(hw);
struct clk *clk = hw->clk;
@ -1075,7 +1075,7 @@ static long kona_peri_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
if (delta < best_delta) {
best_delta = delta;
best_rate = other_rate;
*best_parent = parent;
*best_parent = __clk_get_hw(parent);
*best_parent_rate = parent_rate;
}
}

9
drivers/clk/clk-composite.c
View File

@ -57,7 +57,7 @@ static unsigned long clk_composite_recalc_rate(struct clk_hw *hw,
static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_p)
struct clk_hw **best_parent_p)
{
struct clk_composite *composite = to_clk_composite(hw);
const struct clk_ops *rate_ops = composite->rate_ops;
@ -80,8 +80,9 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
*best_parent_p = NULL;
if (__clk_get_flags(hw->clk) & CLK_SET_RATE_NO_REPARENT) {
*best_parent_p = clk_get_parent(mux_hw->clk);
*best_parent_rate = __clk_get_rate(*best_parent_p);
parent = clk_get_parent(mux_hw->clk);
*best_parent_p = __clk_get_hw(parent);
*best_parent_rate = __clk_get_rate(parent);
return rate_ops->round_rate(rate_hw, rate,
best_parent_rate);
@ -103,7 +104,7 @@ static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate,
if (!rate_diff || !*best_parent_p
|| best_rate_diff > rate_diff) {
*best_parent_p = parent;
*best_parent_p = __clk_get_hw(parent);
*best_parent_rate = parent_rate;
best_rate_diff = rate_diff;
best_rate = tmp_rate;

17
drivers/clk/clk.c
View File

@ -702,7 +702,7 @@ struct clk *__clk_lookup(const char *name)
*/
long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_p)
struct clk_hw **best_parent_p)
{
struct clk *clk = hw->clk, *parent, *best_parent = NULL;
int i, num_parents;
@ -738,7 +738,7 @@ long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
out:
if (best_parent)
*best_parent_p = best_parent;
*best_parent_p = best_parent->hw;
*best_parent_rate = best;
return best;
@ -946,6 +946,7 @@ unsigned long __clk_round_rate(struct clk *clk, unsigned long rate)
{
unsigned long parent_rate = 0;
struct clk *parent;
struct clk_hw *parent_hw;
if (!clk)
return 0;
@ -954,10 +955,11 @@ unsigned long __clk_round_rate(struct clk *clk, unsigned long rate)
if (parent)
parent_rate = parent->rate;
if (clk->ops->determine_rate)
if (clk->ops->determine_rate) {
parent_hw = parent ? parent->hw : NULL;
return clk->ops->determine_rate(clk->hw, rate, &parent_rate,
&parent);
else if (clk->ops->round_rate)
&parent_hw);
} else if (clk->ops->round_rate)
return clk->ops->round_rate(clk->hw, rate, &parent_rate);
else if (clk->flags & CLK_SET_RATE_PARENT)
return __clk_round_rate(clk->parent, rate);
@ -1345,6 +1347,7 @@ static struct clk *clk_calc_new_rates(struct clk *clk, unsigned long rate)
{
struct clk *top = clk;
struct clk *old_parent, *parent;
struct clk_hw *parent_hw;
unsigned long best_parent_rate = 0;
unsigned long new_rate;
int p_index = 0;
@ -1360,9 +1363,11 @@ static struct clk *clk_calc_new_rates(struct clk *clk, unsigned long rate)
/* find the closest rate and parent clk/rate */
if (clk->ops->determine_rate) {
parent_hw = parent ? parent->hw : NULL;
new_rate = clk->ops->determine_rate(clk->hw, rate,
&best_parent_rate,
&parent);
&parent_hw);
parent = parent_hw->clk;
} else if (clk->ops->round_rate) {
new_rate = clk->ops->round_rate(clk->hw, rate,
&best_parent_rate);

2
drivers/clk/hisilicon/clk-hi3620.c
View File

@ -296,7 +296,7 @@ static unsigned long mmc_clk_recalc_rate(struct clk_hw *hw,
static long mmc_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_p)
struct clk_hw **best_parent_p)
{
struct clk_mmc *mclk = to_mmc(hw);
unsigned long best = 0;

4
drivers/clk/mmp/clk-mix.c
View File

@ -203,7 +203,7 @@ error:
static long mmp_clk_mix_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_clk)
struct clk_hw **best_parent_clk)
{
struct mmp_clk_mix *mix = to_clk_mix(hw);
struct mmp_clk_mix_clk_table *item;
@ -264,7 +264,7 @@ static long mmp_clk_mix_determine_rate(struct clk_hw *hw, unsigned long rate,
found:
*best_parent_rate = parent_rate_best;
*best_parent_clk = parent_best;
*best_parent_clk = __clk_get_hw(parent_best);
return mix_rate_best;
}

2
drivers/clk/qcom/clk-pll.c
View File

@ -141,7 +141,7 @@ struct pll_freq_tbl *find_freq(const struct pll_freq_tbl *f, unsigned long rate)
static long
clk_pll_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *p_rate, struct clk **p)
unsigned long *p_rate, struct clk_hw **p)
{
struct clk_pll *pll = to_clk_pll(hw);
const struct pll_freq_tbl *f;

20
drivers/clk/qcom/clk-rcg.c
View File

@ -368,16 +368,17 @@ clk_dyn_rcg_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
static long _freq_tbl_determine_rate(struct clk_hw *hw,
const struct freq_tbl *f, unsigned long rate,
unsigned long *p_rate, struct clk **p)
unsigned long *p_rate, struct clk_hw **p_hw)
{
unsigned long clk_flags;
struct clk *p;
f = qcom_find_freq(f, rate);
if (!f)
return -EINVAL;
clk_flags = __clk_get_flags(hw->clk);
*p = clk_get_parent_by_index(hw->clk, f->src);
p = clk_get_parent_by_index(hw->clk, f->src);
if (clk_flags & CLK_SET_RATE_PARENT) {
rate = rate * f->pre_div;
if (f->n) {
@ -387,15 +388,16 @@ static long _freq_tbl_determine_rate(struct clk_hw *hw,
rate = tmp;
}
} else {
rate = __clk_get_rate(*p);
rate = __clk_get_rate(p);
}
*p_hw = __clk_get_hw(p);
*p_rate = rate;
return f->freq;
}
static long clk_rcg_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *p_rate, struct clk **p)
unsigned long *p_rate, struct clk_hw **p)
{
struct clk_rcg *rcg = to_clk_rcg(hw);
@ -403,7 +405,7 @@ static long clk_rcg_determine_rate(struct clk_hw *hw, unsigned long rate,
}
static long clk_dyn_rcg_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *p_rate, struct clk **p)
unsigned long *p_rate, struct clk_hw **p)
{
struct clk_dyn_rcg *rcg = to_clk_dyn_rcg(hw);
@ -411,13 +413,15 @@ static long clk_dyn_rcg_determine_rate(struct clk_hw *hw, unsigned long rate,
}
static long clk_rcg_bypass_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *p_rate, struct clk **p)
unsigned long *p_rate, struct clk_hw **p_hw)
{
struct clk_rcg *rcg = to_clk_rcg(hw);
const struct freq_tbl *f = rcg->freq_tbl;
struct clk *p;
*p = clk_get_parent_by_index(hw->clk, f->src);
*p_rate = __clk_round_rate(*p, rate);
p = clk_get_parent_by_index(hw->clk, f->src);
*p_hw = __clk_get_hw(p);
*p_rate = __clk_round_rate(p, rate);
return *p_rate;
}

28
drivers/clk/qcom/clk-rcg2.c
View File

@ -175,16 +175,17 @@ clk_rcg2_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
static long _freq_tbl_determine_rate(struct clk_hw *hw,
const struct freq_tbl *f, unsigned long rate,
unsigned long *p_rate, struct clk **p)
unsigned long *p_rate, struct clk_hw **p_hw)
{
unsigned long clk_flags;
struct clk *p;
f = qcom_find_freq(f, rate);
if (!f)
return -EINVAL;
clk_flags = __clk_get_flags(hw->clk);
*p = clk_get_parent_by_index(hw->clk, f->src);
p = clk_get_parent_by_index(hw->clk, f->src);
if (clk_flags & CLK_SET_RATE_PARENT) {
if (f->pre_div) {
rate /= 2;
@ -198,15 +199,16 @@ static long _freq_tbl_determine_rate(struct clk_hw *hw,
rate = tmp;
}
} else {
rate = __clk_get_rate(*p);
rate = __clk_get_rate(p);
}
*p_hw = __clk_get_hw(p);
*p_rate = rate;
return f->freq;
}
static long clk_rcg2_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *p_rate, struct clk **p)
unsigned long *p_rate, struct clk_hw **p)
{
struct clk_rcg2 *rcg = to_clk_rcg2(hw);
@ -359,7 +361,7 @@ static int clk_edp_pixel_set_rate_and_parent(struct clk_hw *hw,
}
static long clk_edp_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *p_rate, struct clk **p)
unsigned long *p_rate, struct clk_hw **p)
{
struct clk_rcg2 *rcg = to_clk_rcg2(hw);
const struct freq_tbl *f = rcg->freq_tbl;
@ -371,7 +373,7 @@ static long clk_edp_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
u32 hid_div;
/* Force the correct parent */
*p = clk_get_parent_by_index(hw->clk, f->src);
*p = __clk_get_hw(clk_get_parent_by_index(hw->clk, f->src));
if (src_rate == 810000000)
frac = frac_table_810m;
@ -410,18 +412,20 @@ const struct clk_ops clk_edp_pixel_ops = {
EXPORT_SYMBOL_GPL(clk_edp_pixel_ops);
static long clk_byte_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *p_rate, struct clk **p)
unsigned long *p_rate, struct clk_hw **p_hw)
{
struct clk_rcg2 *rcg = to_clk_rcg2(hw);
const struct freq_tbl *f = rcg->freq_tbl;
unsigned long parent_rate, div;
u32 mask = BIT(rcg->hid_width) - 1;
struct clk *p;
if (rate == 0)
return -EINVAL;
*p = clk_get_parent_by_index(hw->clk, f->src);
*p_rate = parent_rate = __clk_round_rate(*p, rate);
p = clk_get_parent_by_index(hw->clk, f->src);
*p_hw = __clk_get_hw(p);
*p_rate = parent_rate = __clk_round_rate(p, rate);
div = DIV_ROUND_UP((2 * parent_rate), rate) - 1;
div = min_t(u32, div, mask);
@ -472,14 +476,16 @@ static const struct frac_entry frac_table_pixel[] = {
};
static long clk_pixel_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *p_rate, struct clk **p)
unsigned long *p_rate, struct clk_hw **p)
{
struct clk_rcg2 *rcg = to_clk_rcg2(hw);
unsigned long request, src_rate;
int delta = 100000;
const struct freq_tbl *f = rcg->freq_tbl;
const struct frac_entry *frac = frac_table_pixel;
struct clk *parent = *p = clk_get_parent_by_index(hw->clk, f->src);
struct clk *parent = clk_get_parent_by_index(hw->clk, f->src);
*p = __clk_get_hw(parent);
for (; frac->num; frac++) {
request = (rate * frac->den) / frac->num;

4
drivers/clk/sunxi/clk-factors.c
View File

@ -81,7 +81,7 @@ static long clk_factors_round_rate(struct clk_hw *hw, unsigned long rate,
static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_p)
struct clk_hw **best_parent_p)
{
struct clk *clk = hw->clk, *parent, *best_parent = NULL;
int i, num_parents;
@ -108,7 +108,7 @@ static long clk_factors_determine_rate(struct clk_hw *hw, unsigned long rate,
}
if (best_parent)
*best_parent_p = best_parent;
*best_parent_p = __clk_get_hw(best_parent);
*best_parent_rate = best;
return best_child_rate;

4
drivers/clk/sunxi/clk-sun6i-ar100.c
View File

@ -46,7 +46,7 @@ static unsigned long ar100_recalc_rate(struct clk_hw *hw,
static long ar100_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_clk)
struct clk_hw **best_parent_clk)
{
int nparents = __clk_get_num_parents(hw->clk);
long best_rate = -EINVAL;
@ -100,7 +100,7 @@ static long ar100_determine_rate(struct clk_hw *hw, unsigned long rate,
tmp_rate = (parent_rate >> shift) / div;
if (!*best_parent_clk || tmp_rate > best_rate) {
*best_parent_clk = parent;
*best_parent_clk = __clk_get_hw(parent);
*best_parent_rate = parent_rate;
best_rate = tmp_rate;
}

4
include/linux/clk-provider.h
View File

@ -176,7 +176,7 @@ struct clk_ops {
unsigned long *parent_rate);
long (*determine_rate)(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_clk);
struct clk_hw **best_parent_hw);
int (*set_parent)(struct clk_hw *hw, u8 index);
u8 (*get_parent)(struct clk_hw *hw);
int (*set_rate)(struct clk_hw *hw, unsigned long rate,
@ -551,7 +551,7 @@ bool __clk_is_enabled(struct clk *clk);
struct clk *__clk_lookup(const char *name);
long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_p);
struct clk_hw **best_parent_p);
/*
* FIXME clock api without lock protection