A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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clk: Print enabled clock tree when cpu/cluster enters LPM level

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When idle, cpu/cluster can enter various LPM levels
and can be blocked by certain clk/clks as clks
are voted on. Printed clk tree in path of cpu/cluster entering
one of LPM level, helps to know/debug on what is blocking
cpu/cluster entering LPM.

Change-Id: I194c09fb65783c76628aae5702be5a53fa7001b5
Signed-off-by: Vivek Aknurwar <viveka@codeaurora.org>
This commit is contained in:
Vivek Aknurwar 2020-02-21 11:23:39 -08:00
commit 87ec7030e2
1 changed files with 15 additions and 9 deletions
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24
drivers/clk/clk.c
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@ -3268,10 +3268,12 @@ static void clk_debug_unregister(struct clk_core *core)
}
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
#define clock_debug_output(m, fmt, ...) \
#define clock_debug_output(m, c, fmt, ...) \
do { \
if (m) \
seq_printf(m, fmt, ##__VA_ARGS__); \
else if (c) \
pr_cont(fmt, ##__VA_ARGS__); \
else \
pr_info(fmt, ##__VA_ARGS__); \
} while (0)
@ -3284,28 +3286,29 @@ static int clock_debug_print_clock(struct clk_core *c, struct seq_file *s)
if (!c || !c->prepare_count)
return 0;
clock_debug_output(s, 0, " ");
clk = c->hw->clk;
do {
c = clk->core;
if (c->ops->list_rate_vdd_level)
clock_debug_output(s, "%s%s:%u:%u [%ld, %d]", start,
clock_debug_output(s, 1, "%s%s:%u:%u [%ld, %d]", start,
c->name,
c->prepare_count,
c->enable_count,
c->rate,
c->ops->list_rate_vdd_level(c->hw, c->rate));
else
clock_debug_output(s, "%s%s:%u:%u [%ld]", start,
clock_debug_output(s, 1, "%s%s:%u:%u [%ld]", start,
c->name,
c->prepare_count,
c->enable_count,
c->rate);
start = " -> ";
} while (s && (clk = clk_get_parent(clk)));
} while ((clk = clk_get_parent(clk)));
if (s)
clock_debug_output(s, "\n");
clock_debug_output(s, 1, "\n");
return 1;
}
@ -3318,21 +3321,23 @@ static void clock_debug_print_enabled_clocks(struct seq_file *s)
struct clk_core *core;
int cnt = 0;
clock_debug_output(s, "Enabled clocks:\n");
clock_debug_output(s, 0, "Enabled clocks:\n");
hlist_for_each_entry(core, &clk_debug_list, debug_node)
cnt += clock_debug_print_clock(core, s);
if (cnt)
clock_debug_output(s, "Enabled clock count: %d\n", cnt);
clock_debug_output(s, 0, "Enabled clock count: %d\n", cnt);
else
clock_debug_output(s, "No clocks enabled.\n");
clock_debug_output(s, 0, "No clocks enabled.\n");
}
static int enabled_clocks_show(struct seq_file *s, void *unused)
{
mutex_lock(&clk_debug_lock);
clock_debug_print_enabled_clocks(s);
mutex_unlock(&clk_debug_lock);
return 0;
@ -3365,6 +3370,7 @@ void clock_debug_print_enabled(void)
return;
clock_debug_print_enabled_clocks(NULL);
mutex_unlock(&clk_debug_lock);
}
EXPORT_SYMBOL(clock_debug_print_enabled);