linux-kernel - Re: [PATCH v2 2/2] pci: host: Add Broadcom STB PCIE RC controller

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Date:	Mon, 16 May 2016 18:50:08 -0700
From:	Florian Fainelli <f.fainelli@...il.com>
To:	Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"bcm-kernel-feedback-list@...adcom.com" 
	<bcm-kernel-feedback-list@...adcom.com>,
	"jim2101024@...il.com" <jim2101024@...il.com>,
	"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
	"arnd@...db.de" <arnd@...db.de>
Subject: Re: [PATCH v2 2/2] pci: host: Add Broadcom STB PCIE RC controller

On 05/11/2016 07:47 AM, Bharat Kumar Gogada wrote:

[snip]

>> +	/* Get the value for the log2 of the scb sizes. Subtract 15 from
>> +	 * each because the target register field has 0==disabled and 1==6KB.
>> +	 */
>> +	log2_scb_sizes = of_get_property(dn, "brcm,log2-scb-sizes", &rlen);
>> +	if (log2_scb_sizes) {
>> +		for (i = 0; i < rlen / sizeof(u32); i++) {
>> +			pcie->scb_size_vals[i]
>> +				= (int)of_read_number(log2_scb_sizes + i, 1)
>> +					- 15;
>> +			pcie->num_memc++;
>> +		}
>> +	}
> In your device tree documentation this is required property, what if this property 
> is missing ?

If you look at the driver, you will see that it assumes a 1GB SCB window
size if this property is absent.

PS: Do you mind trimming your replies in the future just to quote the
relevant part? Pretty much like I just did, this greatly improves the
ability to jump right to where the comments are. Thanks
-- 
Florian