linux-kernel - Re: mfd: intel_soc_pmic_bxtwc: irq 0 issue, tmu and typec components fail to probe.

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Message-ID: <2024081349-erupt-reaction-efaa@gregkh>
Date: Tue, 13 Aug 2024 10:54:04 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Zhang Ning <zhangn1985@...look.com>
Cc: Andy Shevchenko <andy@...nel.org>, rafael@...nel.org,
	linux-kernel@...r.kernel.org, lee@...nel.org
Subject: Re: mfd: intel_soc_pmic_bxtwc: irq 0 issue, tmu and typec components
 fail to probe.

On Sat, Aug 10, 2024 at 01:27:18PM +0800, Zhang Ning wrote:
> On Fri, Aug 09, 2024 at 05:09:49PM +0300, Andy Shevchenko wrote:
> > On Fri, Aug 09, 2024 at 08:53:24PM +0800, Zhang Ning wrote:
> > > On Fri, Aug 09, 2024 at 03:33:33PM +0300, Andy Shevchenko wrote:
> > > > On Fri, Aug 09, 2024 at 08:02:43PM +0800, Zhang Ning wrote:
> > > > > Hi, Greg & Rafael
> > > > > 
> > > > > recently, when I try to enable mfd components for intel_soc_pmic_bxtwc
> > > > > for debian kernel[0]. I find tmu and typec failed to probe.
> > > > > 
> > > > > after check source code, I find irq for these two devices are 0, when
> > > > > use platform_get_irq, it will alway fail.
> > > > > 
> > > > > 	if (WARN(!ret, "0 is an invalid IRQ number\n"))
> > > > > 		return -EINVAL;
> > > > > 	return ret;
> > > > > 
> Hi, Greg
> 	One more question, I don't understand why 0 is not a valid IRQ
> 	number for platform device?

Please search the archives for many many many discussions about this.

thanks,

greg k-h