Commit 661dfb7f authored by Fancy Fang's avatar Fancy Fang Committed by Thierry Reding
Browse files

pwm: imx-tpm: force 'real_period' to be zero in suspend 



During suspend, all the tpm registers will lose values.
So the 'real_period' value of struct 'imx_tpm_pwm_chip'
should be forced to be zero to force the period update
code can be executed after system resume back.

Signed-off-by: default avatarFancy Fang <chen.fang@nxp.com>
Signed-off-by: default avatarClark Wang <xiaoning.wang@nxp.com>
Acked-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Fixes: 738a1cfe ("pwm: Add i.MX TPM PWM driver support")
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent 329db102

drivers/pwm/pwm-imx-tpm.c

+7 −0
Original line number Diff line number Diff line
@@ -397,6 +397,13 @@ static int __maybe_unused pwm_imx_tpm_suspend(struct device *dev) 
	if (tpm->enable_count > 0)

		return -EBUSY;



	/*

	 * Force 'real_period' to be zero to force period update code

	 * can be executed after system resume back, since suspend causes

	 * the period related registers to become their reset values.

	 */

	tpm->real_period = 0;



	clk_disable_unprepare(tpm->clk);



	return 0;