Re: [PATCH] watchdog: Add hardware dependency to BCM7038 driver

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On Mon, Feb 22, 2016 at 11:16:30AM -0800, Justin Chen wrote:
> On Mon, Feb 22, 2016 at 10:43 AM, Jean Delvare <jdelvare@xxxxxxx> wrote:
> > Hello Justin,
> >
> > Le Monday 22 February 2016 à 09:58 -0800, Justin Chen a écrit :
> >> This driver is based off of a Broadcom watchdog block, it is not tied
> >> to the MIPS core.
> >> The watchdog driver is named BCM7038 because that was the first chip
> >> that featured this watchdog block. Their are other chips that use this
> >> driver that are not MIPS based.
> >
> > The Kconfig help text doesn't say this at all. With the current wording
> > there is no reason why anyone would enable this option if not building a
> > kernel for the Broadcom BCM7038.
> Sorry about that! I can submit a patch to fix this.
> >
> > Which other systems reuse this watchdog block exactly? In the kernel
> > tree I can't see anyone instantiating this device.
> BRCMSTB chips use this block as well as other BCM chips.
> 
> "This driver is for a watchdog block contained in all Broadcom Set-top
> Box chips since BCM7038. BCM7038 was made public during the 2004 CES,
> and since then, many chips use this watchdog block including some cable
> modem chips."

That is a bit vague. Can you be more specific ?

Also, while the driver may not be limited to MIPS, I am relatively sure
that it has some architecture limits. MIPS, ARM, and ARM64, maybe ?

Thanks,
Guenter
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