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pmdomain: core: Support naming idle states

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Commit 422f2d4181 ("arm64: dts: qcom: Drop undocumented domain
"idle-state-name"") brought to light the common misbelief that
idle-state-names also applies to e.g. PSCI power domain idle states.

Make that a reality, mimicking the property name used by cpuidle
states.

Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Message-ID: <20241130-topic-idle_state_name-v1-2-d0ff67b0c8e9@oss.qualcomm.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Konrad Dybcio 2024-11-30 17:39:37 +01:00 committed by Ulf Hansson
parent 11444fb6f2
commit b04b981f3a
2 changed files with 13 additions and 3 deletions
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15
drivers/pmdomain/core.c
View File

@ -3174,6 +3174,8 @@ static int genpd_parse_state(struct genpd_power_state *genpd_state,
if (!err)
genpd_state->residency_ns = 1000LL * residency;
of_property_read_string(state_node, "idle-state-name", &genpd_state->name);
genpd_state->power_on_latency_ns = 1000LL * exit_latency;
genpd_state->power_off_latency_ns = 1000LL * entry_latency;
genpd_state->fwnode = &state_node->fwnode;
@ -3452,7 +3454,10 @@ static int idle_states_show(struct seq_file *s, void *data)
seq_puts(s, "State Time Spent(ms) Usage Rejected\n");
for (i = 0; i < genpd->state_count; i++) {
idle_time += genpd->states[i].idle_time;
struct genpd_power_state *state = &genpd->states[i];
char state_name[15];
idle_time += state->idle_time;
if (genpd->status == GENPD_STATE_OFF && genpd->state_idx == i) {
now = ktime_get_mono_fast_ns();
@ -3462,9 +3467,13 @@ static int idle_states_show(struct seq_file *s, void *data)
}
}
if (!state->name)
snprintf(state_name, ARRAY_SIZE(state_name), "S%-13d", i);
do_div(idle_time, NSEC_PER_MSEC);
seq_printf(s, "S%-13i %-14llu %-14llu %llu\n", i, idle_time,
genpd->states[i].usage, genpd->states[i].rejected);
seq_printf(s, "%-14s %-14llu %-14llu %llu\n",
state->name ?: state_name, idle_time,
state->usage, state->rejected);
}
genpd_unlock(genpd);

1
include/linux/pm_domain.h
View File

@ -147,6 +147,7 @@ struct genpd_governor_data {
};
struct genpd_power_state {
const char *name;
s64 power_off_latency_ns;
s64 power_on_latency_ns;
s64 residency_ns;