From: Ulf Hansson Date: Mon, 19 Jan 2026 14:31:14 +0000 (+0100) Subject: pmdomain: core: Show latency/residency for domain idle states in debugfs X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=68831a9ef9d216985d6f51ea84a647a658ace9ba;p=thirdparty%2Flinux.git pmdomain: core: Show latency/residency for domain idle states in debugfs Similar to how cpuidle provides the values for latency and residency for CPU's idle states through sysfs, let's make the corresponding data for PM domain's idle states available for user space, via genpd's debugfs support. Suggested-by: Dhruva Gole Reviewed-by: Dhruva Gole Reviewed-by: Kevin Hilman Signed-off-by: Ulf Hansson --- diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c index 3b2e152dfd35..4e9088ce3a25 100644 --- a/drivers/pmdomain/core.c +++ b/drivers/pmdomain/core.c @@ -3809,15 +3809,24 @@ static int idle_states_desc_show(struct seq_file *s, void *data) if (ret) return -ERESTARTSYS; - seq_puts(s, "State Name\n"); + seq_puts(s, "State Latency(us) Residency(us) Name\n"); for (i = 0; i < genpd->state_count; i++) { struct genpd_power_state *state = &genpd->states[i]; + u64 latency, residency; char state_name[7]; + latency = state->power_off_latency_ns + + state->power_on_latency_ns; + do_div(latency, NSEC_PER_USEC); + + residency = state->residency_ns; + do_div(residency, NSEC_PER_USEC); + snprintf(state_name, ARRAY_SIZE(state_name), "S%-5d", i); - seq_printf(s, "%-6s %s\n", - state_name, state->name ?: "N/A"); + seq_printf(s, "%-6s %-12llu %-14llu %s\n", + state_name, latency, residency, + state->name ?: "N/A"); } genpd_unlock(genpd);