linux-kernel - RE: [PATCH 1/3 v2] usb: tegra20-ehci: Add devicetree support.

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Date:	Wed, 20 Jul 2011 12:51:08 -0700
From:	Stephen Warren <swarren@...dia.com>
To:	Andrew Chew <AChew@...dia.com>,
	"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
	"olof@...om.net" <olof@...om.net>,
	Dan Willemsen <dwillemsen@...dia.com>,
	Rhyland Klein <rklein@...dia.com>,
	Venkat Moganty <vmoganty@...dia.com>
CC:	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andrew Chew <AChew@...dia.com>
Subject: RE: [PATCH 1/3 v2] usb: tegra20-ehci: Add devicetree support.

achew@...dia.com wrote at Wednesday, July 20, 2011 1:38 PM:
> From: Andrew Chew <achew@...dia.com>
> 
> Add code to try to get platform data information (register base, irq,
> modes, various tuning parameters) from device tree, if not present in board
> files.
> 
> Signed-off-by: Andrew Chew <achew@...dia.com>

> +++ b/Documentation/devicetree/bindings/usb/tegra20-ehci.txt
...
> +Required properties for type = "ulpi":
> + - reset_gpio: The GPIO used to drive reset
> + - clk

We should probably document what this is. I know you're finding out more
about this internally.

> diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
> +	retval = of_property_read_u32(dn, "power_down_on_bus_suspend",
> +				      &pdata->power_down_on_bus_suspend);

Sorry I missed this before, but perhaps we should skip reading that
property unless mode=="host"?

Otherwise,
Acked-by: Stephen Warren <swarren@...dia.com>

-- 
nvpublic

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