From: Timur Tabi <timur@codeaurora•org>
To: Rob Herring <robh@kernel•org>
Cc: netdev@vger•kernel.org, devicetree@vger•kernel.org,
linux-arm-msm@vger•kernel.org, sdharia@codeaurora•org,
shankerd@codeaurora•org, vikrams@codeaurora•org,
cov@codeaurora•org, gavidov@codeaurora•org, andrew@lunn•ch,
bjorn.andersson@linaro•org, mlangsdo@redhat•com, jcm@redhat•com,
agross@codeaurora•org, davem@davemloft•net, f.fainelli@gmail•com
Subject: Re: [PATCH] [v5] net: emac: emac gigabit ethernet controller driver
Date: Mon, 20 Jun 2016 12:41:23 -0500 [thread overview]
Message-ID: <57682AC3.4040003@codeaurora.org> (raw)
In-Reply-To: <20160619141757.GA4249@rob-hp-laptop>
Rob Herring wrote:
>> >+ dma-ranges = <0 0 0xffffffff>;
> I believe dma-ranges is supposed to be in the bus (parent) node.
Maybe I'm just going to be perpetually confused by dma-ranges, but how
can I specify that the emac has a different DMA range from another SOC
device, if dma-ranges is in the parent node?
The EMAC itself is capable of 64-bit DMA internally (I should have
included a dma_set_mask call with DMA_BIT_MASK(64) in the driver).
However, the platform typically limits this range. On FSM9900 and
QDF2432, it's 32 bits. On the next server chip, it'll be the full 64
bits. I need some way to handle that.
--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora
Forum, a Linux Foundation collaborative project.
next prev parent reply other threads:[~2016-06-20 17:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-14 22:22 [PATCH] [v5] net: emac: emac gigabit ethernet controller driver Timur Tabi
2016-06-16 4:41 ` David Miller
2016-06-16 5:05 ` Timur Tabi
2016-06-19 14:17 ` Rob Herring
2016-06-20 17:41 ` Timur Tabi [this message]
2016-06-20 18:04 ` Shanker Donthineni
2016-06-20 18:15 ` Timur Tabi
2016-06-20 18:49 ` Timur Tabi
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