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Date: Fri, 15 Apr 2016 12:00:35 -0500 From: Timur Tabi <timur@...eaurora.org> To: Bjorn Andersson <bjorn.andersson@...aro.org> Cc: Vikram Sethi <vikrams@...eaurora.org>, Florian Fainelli <f.fainelli@...il.com>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org, sdharia@...eaurora.org, Shanker Donthineni <shankerd@...eaurora.org>, Greg Kroah-Hartman <greg@...ah.com>, cov@...eaurora.org, gavidov@...eaurora.org, Rob Herring <robh+dt@...nel.org>, andrew@...n.ch, Mark Langsdorf <mlangsdo@...hat.com>, Jon Masters <jcm@...hat.com>, Andy Gross <agross@...eaurora.org>, "David S. Miller" <davem@...emloft.net> Subject: Re: [PATCH 1/2] [v4] net: emac: emac gigabit ethernet controller driver Bjorn Andersson wrote: > For platform devices being populated via from DT you will pass: > of_platform_bus_create() > of_platform_device_create_pdata() > of_dma_configure() > > Which calls of_dma_get_range() to acquire this information from the > dma-ranges property and set up the dma ops and properties. This seems excessive. I have to create a platform bus just to configure the DMA mask? Most drivers just call dma_set_mask and give it a number, and that's not device-tree specific. I also need to come up with a way to get this to work on ACPI. I just seems like a lot of work only because I need to determine at runtime what my DMA mask is. I also don't see any drivers that call of_dma_configure(). -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation collaborative project.
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