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debugcc: split measurement function

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Split measurement function into clock rate calculation
(measure_default()) and the wrapper that prepares muxes and then
disables them. This fixes the issue that muxes will not be disabled for
the clocks that are not turned off (because measure function will return
early for disabled clocks).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Dmitry Baryshkov
2023-01-18 07:19:49 +02:00
committed by Bjorn Andersson
parent 23583b8546
commit bdb901f2ae
1 changed files with 40 additions and 25 deletions
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65
debugcc.c
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@@ -145,13 +145,46 @@ static bool leaf_enabled(struct debug_mux *mux, struct debug_mux *leaf)
return !val;
}
static void measure(const struct measure_clk *clk)
static unsigned long measure_default(const struct measure_clk *clk)
{
unsigned long raw_count_short;
unsigned long raw_count_full;
struct debug_mux *gcc = clk->primary;
unsigned long xo_div4;
xo_div4 = readl(gcc->base + gcc->xo_div4_reg);
writel(xo_div4 | 1, gcc->base + gcc->xo_div4_reg);
raw_count_short = measure_ticks(gcc, 0x1000);
raw_count_full = measure_ticks(gcc, 0x10000);
writel(xo_div4, gcc->base + gcc->xo_div4_reg);
if (raw_count_full == raw_count_short) {
return 0;
}
raw_count_full = ((raw_count_full * 10) + 15) * 4800000;
raw_count_full = raw_count_full / ((0x10000 * 10) + 35);
if (clk->leaf && clk->leaf->div_val)
raw_count_full *= clk->leaf->div_val;
if (clk->primary->div_val)
raw_count_full *= clk->primary->div_val;
if (clk->fixed_div)
raw_count_full *= clk->fixed_div;
return raw_count_full;
}
static void measure(const struct measure_clk *clk)
{
unsigned long clk_rate;
struct debug_mux *gcc = clk->primary;
if (!leaf_enabled(gcc, clk->leaf)) {
printf("%50s: skipping\n", clk->name);
return;
@@ -162,37 +195,19 @@ static void measure(const struct measure_clk *clk)
mux_prepare_enable(clk->primary, clk->mux);
xo_div4 = readl(gcc->base + gcc->xo_div4_reg);
writel(xo_div4 | 1, gcc->base + gcc->xo_div4_reg);
raw_count_short = measure_ticks(gcc, 0x1000);
raw_count_full = measure_ticks(gcc, 0x10000);
writel(xo_div4, gcc->base + gcc->xo_div4_reg);
if (raw_count_full == raw_count_short) {
printf("%50s: off\n", clk->name);
return;
}
raw_count_full = ((raw_count_full * 10) + 15) * 4800000;
raw_count_full = raw_count_full / ((0x10000 * 10) + 35);
clk_rate = measure_default(clk);
mux_disable(clk->primary);
if (clk->leaf)
mux_disable(clk->leaf);
if (clk->leaf && clk->leaf->div_val)
raw_count_full *= clk->leaf->div_val;
if (clk_rate == 0) {
printf("%50s: off\n", clk->name);
return;
}
if (clk->primary->div_val)
raw_count_full *= clk->primary->div_val;
if (clk->fixed_div)
raw_count_full *= clk->fixed_div;
printf("%50s: %fMHz (%ldHz)\n", clk->name, raw_count_full / 1000000.0, raw_count_full);
printf("%50s: %fMHz (%ldHz)\n", clk->name, clk_rate / 1000000.0, clk_rate);
}
static const struct debugcc_platform *find_platform(const char *name)