Patch "pwm: imx-tpm: force 'real_period' to be zero in suspend" has been added to the 5.10-stable tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



This is a note to let you know that I've just added the patch titled

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

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     pwm-imx-tpm-force-real_period-to-be-zero-in-suspend.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 4592e1dab1571866f9190655b7b95d5e4b005f8c
Author: Fancy Fang <chen.fang@xxxxxxx>
Date:   Fri May 5 14:58:39 2023 +0800

    pwm: imx-tpm: force 'real_period' to be zero in suspend
    
    [ Upstream commit 661dfb7f46298e53f6c3deaa772fa527aae86193 ]
    
    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: Fancy Fang <chen.fang@xxxxxxx>
    Signed-off-by: Clark Wang <xiaoning.wang@xxxxxxx>
    Acked-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
    Fixes: 738a1cfec2ed ("pwm: Add i.MX TPM PWM driver support")
    Signed-off-by: Thierry Reding <thierry.reding@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/pwm/pwm-imx-tpm.c b/drivers/pwm/pwm-imx-tpm.c
index fcdf6befb8389..871527b78aa46 100644
--- a/drivers/pwm/pwm-imx-tpm.c
+++ b/drivers/pwm/pwm-imx-tpm.c
@@ -403,6 +403,13 @@ 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;



[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux