linux-kernel - Re: [PATCH v3 4/7] dt-bindings: atmel-usart: remove wildcard

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Date:   Tue, 14 Jan 2020 16:03:53 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Claudiu.Beznea@...rochip.com
Cc:     robh+dt@...nel.org, lee.jones@...aro.org, mark.rutland@....com,
        Nicolas.Ferre@...rochip.com, Ludovic.Desroches@...rochip.com,
        radu_nicolae.pirea@....ro, richard.genoud@...il.com,
        a.zummo@...ertech.it, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-spi@...r.kernel.org, linux-rtc@...r.kernel.org
Subject: Re: [PATCH v3 4/7] dt-bindings: atmel-usart: remove wildcard

On 14/01/2020 14:58:23+0000, Claudiu.Beznea@...rochip.com wrote:
> > Then, what is the point of adding microchip,sam9x60-dbgu ?
> 
> Different meaning for CIDR register bits. Version is kept on bits 4 to 0
> but not documented in public datasheet, so version displayed by
> drivers/soc/atmel/soc.c should work.

But at91_get_cidr_exid_from_dbgu will not find the node unless you use
two fallbacks.


-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com