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From: "santosh.shilimkar@oracle.com" <santosh.shilimkar@oracle.com>
To: Tony Lindgren <tony@atomide.com>
Cc: "Kwok, WingMan" <w-kwok2@ti.com>,
	"robh+dt@kernel.org" <robh+dt@kernel.org>,
	"pawel.moll@arm.com" <pawel.moll@arm.com>,
	"mark.rutland@arm.com" <mark.rutland@arm.com>,
	"ijc+devicetree@hellion.org.uk" <ijc+devicetree@hellion.org.uk>,
	"galak@codeaurora.org" <galak@codeaurora.org>,
	"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
	"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"ssantosh@kernel.org" <ssantosh@kernel.org>,
	"Karicheri, Muralidharan" <m-karicheri2@ti.com>
Subject: Re: [PATCH] ARM: dts: keystone: use one to one address translations under netcp
Date: Thu, 03 Sep 2015 07:48:56 -0700	[thread overview]
Message-ID: <55E85DD8.4070102@oracle.com> (raw)
In-Reply-To: <20150903142645.GS4215@atomide.com>

On 9/3/15 7:26 AM, Tony Lindgren wrote:
> * santosh shilimkar <santosh.shilimkar@oracle.com> [150902 08:55]:
>>
>> I suspected the same. I know back then we started with SERDES code
>> with NETCP but as you already know, its a separate block which
>> is needed for NIC card to work. Its more of phy and hence its
>> having different address space is not surprising.
>
> The point Santosh is making here though is that any drivers
> tinkering with registers belonging to a separate hardware block
> is a recipe for a long term maintenance nightmare with mysterious
> bugs popping up as things are not clocked or powered properly
> or become racy with other drivers.
>
> Each hardware block needs to have it's own driver and then the
> drivers can communicate using some Linux generic APIs like clock,
> regulator, phy, or mailbox frameworks.
>
Right !!

Regards,
Santosh




WARNING: multiple messages have this Message-ID (diff)
From: santosh.shilimkar@oracle.com (santosh.shilimkar at oracle.com)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: dts: keystone: use one to one address translations under netcp
Date: Thu, 03 Sep 2015 07:48:56 -0700	[thread overview]
Message-ID: <55E85DD8.4070102@oracle.com> (raw)
In-Reply-To: <20150903142645.GS4215@atomide.com>

On 9/3/15 7:26 AM, Tony Lindgren wrote:
> * santosh shilimkar <santosh.shilimkar@oracle.com> [150902 08:55]:
>>
>> I suspected the same. I know back then we started with SERDES code
>> with NETCP but as you already know, its a separate block which
>> is needed for NIC card to work. Its more of phy and hence its
>> having different address space is not surprising.
>
> The point Santosh is making here though is that any drivers
> tinkering with registers belonging to a separate hardware block
> is a recipe for a long term maintenance nightmare with mysterious
> bugs popping up as things are not clocked or powered properly
> or become racy with other drivers.
>
> Each hardware block needs to have it's own driver and then the
> drivers can communicate using some Linux generic APIs like clock,
> regulator, phy, or mailbox frameworks.
>
Right !!

Regards,
Santosh

  reply	other threads:[~2015-09-03 14:49 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-01 20:28 [PATCH] ARM: dts: keystone: use one to one address translations under netcp WingMan Kwok
2015-09-01 20:28 ` WingMan Kwok
2015-09-01 20:28 ` WingMan Kwok
2015-09-01 21:19 ` santosh.shilimkar
2015-09-01 21:19   ` santosh.shilimkar at oracle.com
2015-09-01 21:19   ` santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
2015-09-02 15:31   ` Kwok, WingMan
2015-09-02 15:31     ` Kwok, WingMan
2015-09-02 15:31     ` Kwok, WingMan
2015-09-02 15:50     ` santosh shilimkar
2015-09-02 15:50       ` santosh shilimkar
2015-09-02 15:50       ` santosh shilimkar
2015-09-02 16:35       ` Murali Karicheri
2015-09-02 16:35         ` Murali Karicheri
2015-09-02 16:35         ` Murali Karicheri
2015-09-02 17:24         ` santosh shilimkar
2015-09-02 17:24           ` santosh shilimkar
2015-09-02 17:24           ` santosh shilimkar
2015-09-02 17:58           ` Murali Karicheri
2015-09-02 17:58             ` Murali Karicheri
2015-09-02 17:58             ` Murali Karicheri
2015-09-02 18:25             ` santosh shilimkar
2015-09-02 18:25               ` santosh shilimkar
2015-09-02 18:25               ` santosh shilimkar
2015-09-02 18:42               ` Murali Karicheri
2015-09-02 18:42                 ` Murali Karicheri
2015-09-02 18:42                 ` Murali Karicheri
2015-09-03 14:26       ` Tony Lindgren
2015-09-03 14:26         ` Tony Lindgren
2015-09-03 14:26         ` Tony Lindgren
2015-09-03 14:48         ` santosh.shilimkar [this message]
2015-09-03 14:48           ` santosh.shilimkar at oracle.com
2015-09-03 14:48           ` santosh.shilimkar
2015-09-03 19:18         ` Murali Karicheri
2015-09-03 19:18           ` Murali Karicheri
2015-09-03 19:18           ` Murali Karicheri
2015-09-08 15:13           ` Tony Lindgren
2015-09-08 15:13             ` Tony Lindgren
2015-09-08 15:13             ` Tony Lindgren

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