linux-kernel - RE: [PATCH v5 2/2] ACPI: Add Intel MID SPI early console support.

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Date:	Wed, 10 Oct 2012 03:10:53 +0000
From:	"Zheng, Lv" <lv.zheng@...el.com>
To:	Konrad Rzeszutek Wilk <konrad@...nel.org>
CC:	"Brown, Len" <len.brown@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Jason Wessel <jason.wessel@...driver.com>,
	"Tang, Feng" <feng.tang@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"platform-driver-x86@...r.kernel.org" 
	<platform-driver-x86@...r.kernel.org>
Subject: RE: [PATCH v5 2/2] ACPI: Add Intel MID SPI early console support.

> > +#ifdef CONFIG_EARLY_PRINTK_INTEL_MID_SPI
> > +	if (info->port_type == ACPI_DBG2_SERIAL_PORT
> > +	    && info->port_subtype == ACPI_DBG2_INTEL_MID_SPI
> > +	    && info->register_count > 0) {
> Is it ever going to be zero?

NAK.
No register base definition (buggy BIOS?) is meaningless for ACPI launched MID_SPI earlycon.

Thanks and best regards/Lv Zheng
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