[PATCH 2/4] thunderbolt: add support optional dedicated wakeup irq

[Chunfeng Yun (云春峰)]

On Fri, 2026-10-30 at 09:48 +0100, Mika Westerberg wrote:
> On Fri, Oct 30, 2026 at 04:25:37PM +0800, Chunfeng Yun wrote:
> > There is a dedicated wakeup irq on nvidia n1/n2 SoCs.
> 
> Okay but why it is needed?
due to mac/phy is in power domain which its power/clock will be turn
off when enter into sleep mode, so can not use the mac's irq to trigger
wakeup signal, instead add a dedicated irq to send wake signal which
stay in always-on power domain.

>  Can you add this to the commit message?
OK, will add more info

> 
> And why you did not add it already in the first commit that added the
> platform driver there anyway?
OK.
because I test base funtion first, then support suspend/resume

Thank you

> 
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun at mediatek.com>
> > ---
> >  drivers/thunderbolt/plat.c  | 16 ++++++++++++++++
> >  include/linux/thunderbolt.h |  1 +
> >  2 files changed, 17 insertions(+)
> > 
> > diff --git a/drivers/thunderbolt/plat.c
> > b/drivers/thunderbolt/plat.c
> > index 85a00cd391d4..8d83b484d942 100644
> > --- a/drivers/thunderbolt/plat.c
> > +++ b/drivers/thunderbolt/plat.c
> > @@ -11,6 +11,7 @@
> >  #include <linux/of.h>
> >  #include <linux/platform_device.h>
> >  #include <linux/pm_runtime.h>
> > +#include <linux/pm_wakeirq.h>
> >  #include <linux/slab.h>
> >  
> >  #include "nhi.h"
> > @@ -46,6 +47,15 @@ static int nhi_plat_init_irq(struct tb_nhi *nhi)
> >  	if (ret)
> >  		return dev_err_probe(nhi->dev, ret, "request irq
> > failed\n");
> >  
> > +	if (nhi->wake_irq) {
> > +		ret = dev_pm_set_dedicated_wake_irq(nhi->dev, nhi-
> > >wake_irq);
> > +		if (ret) {
> > +			dev_err_probe(nhi->dev, ret, "set wake irq
> > %d failed\n", nhi->wake_irq);
> > +			return ret;
> > +		}
> > +		dev_info(nhi->dev, "wake irq %d\n", nhi-
> > >wake_irq);
> > +	}
> > +
> >  	return 0;
> >  }
> >  
> > @@ -53,6 +63,7 @@ static void nhi_plat_exit(struct tb_nhi *nhi)
> >  {
> >  	devm_free_irq(nhi->dev, nhi->irq, nhi);
> >  	flush_work(&nhi->interrupt_work);
> > +	dev_pm_clear_wake_irq(nhi->dev);
> >  
> >  	pm_runtime_put_noidle(nhi->dev);
> >  	pm_runtime_disable(nhi->dev);
> > @@ -85,6 +96,11 @@ static int nhi_plat_probe(struct platform_device
> > *pdev)
> >  	if (nhi->irq < 0)
> >  		return dev_err_probe(dev, nhi->irq, "get irq
> > failed\n");
> >  
> > +	/* ignore error */
> > +	nhi->wake_irq = platform_get_irq_optional(pdev, 1);
> > +	if (nhi->wake_irq < 0)
> > +		nhi->wake_irq = 0;
> > +
> >  	return nhi_probe(nhi);
> >  }
> >  
> > diff --git a/include/linux/thunderbolt.h
> > b/include/linux/thunderbolt.h
> > index 212c8fea6571..06b90d452ee2 100644
> > --- a/include/linux/thunderbolt.h
> > +++ b/include/linux/thunderbolt.h
> > @@ -533,6 +533,7 @@ struct tb_nhi {
> >  	bool going_away;
> >  	bool iommu_dma_protection;
> >  	int irq;
> > +	int wake_irq;
> >  	struct work_struct interrupt_work;
> >  	u32 hop_count;
> >  	unsigned long quirks;
> > -- 
> > 2.43.0