Commit 461d68d4 authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Uwe Kleine-König
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pwm: Add actual hardware state to pwm debugfs file 



Traditionally /sys/kernel/debug/pwm only contained info from pwm->state.
Most of the time this data represents the last requested setting which
might differ considerably from the actually configured in hardware
setting.

Expand the information in the debugfs file with the actual values.

Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@baylibre.com>
Reviewed-by: default avatarTrevor Gamblin <tgamblin@baylibre.com>
Link: https://lore.kernel.org/r/20250404104844.543479-2-u.kleine-koenig@baylibre.com


Signed-off-by: default avatarUwe Kleine-König <ukleinek@kernel.org>
parent 7cfe1e20

drivers/pwm/core.c

+11 −8
Original line number Diff line number Diff line
@@ -2221,25 +2221,28 @@ static void pwm_dbg_show(struct pwm_chip *chip, struct seq_file *s) 


	for (i = 0; i < chip->npwm; i++) {

		struct pwm_device *pwm = &chip->pwms[i];

		struct pwm_state state;

		struct pwm_state state, hwstate;



		pwm_get_state(pwm, &state);

		pwm_get_state_hw(pwm, &hwstate);



		seq_printf(s, " pwm-%-3d (%-20.20s):", i, pwm->label);



		if (test_bit(PWMF_REQUESTED, &pwm->flags))

			seq_puts(s, " requested");



		if (state.enabled)

			seq_puts(s, " enabled");

		seq_puts(s, "\n");



		seq_printf(s, " period: %llu ns", state.period);

		seq_printf(s, " duty: %llu ns", state.duty_cycle);

		seq_printf(s, " polarity: %s",

		seq_printf(s, "  requested configuration: %3sabled, %llu/%llu ns, %s polarity",

			   state.enabled ? "en" : "dis", state.duty_cycle, state.period,

			   state.polarity ? "inverse" : "normal");



		if (state.usage_power)

			seq_puts(s, " usage_power");

			seq_puts(s, ", usage_power");

		seq_puts(s, "\n");



		seq_printf(s, "  actual configuration:    %3sabled, %llu/%llu ns, %s polarity",

			   hwstate.enabled ? "en" : "dis", hwstate.duty_cycle, hwstate.period,

			   hwstate.polarity ? "inverse" : "normal");



		seq_puts(s, "\n");

	}