Re: [PATCH 6.6.y] pwm: imx-tpm: Count the number of enabled channels in probe

[Greg KH <gregkh@linuxfoundation.org>]

On Sun, May 03, 2026 at 05:44:04PM +0200, Uwe Kleine-König wrote:
> From: "Viorel Suman (OSS)" <viorel.suman@oss.nxp.com>
> 
> On a soft reset TPM PWM IP may preserve its internal state from previous
> runtime, therefore on a subsequent OS boot and driver probe
> "enable_count" value and TPM PWM IP internal channels "enabled" states
> may get unaligned. In consequence on a suspend/resume cycle the call "if
> (--tpm->enable_count == 0)" may lead to "enable_count" overflow the
> system being blocked from entering suspend due to:
> 
>    if (tpm->enable_count > 0)
>        return -EBUSY;
> 
> Fix the problem by counting the enabled channels in probe function.
> 
> Signed-off-by: Viorel Suman (OSS) <viorel.suman@oss.nxp.com>
> Fixes: 738a1cfec2ed ("pwm: Add i.MX TPM PWM driver support")
> Link: https://patch.msgid.link/20260311123309.348904-1-viorel.suman@oss.nxp.com
> Cc: stable@vger.kernel.org
> Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
> [ukleinek: backport to linux-6.6.y]
> Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
> ---
>  drivers/pwm/pwm-imx-tpm.c | 8 ++++++++
>  1 file changed, 8 insertions(+)

What is the git id of this commit?

thanks,

greg k-h