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Open Source and information security mailing list archives
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Date: Fri, 11 Mar 2011 22:47:16 +0000 From: Andy Green <andy@...mcat.com> To: Grant Likely <grant.likely@...retlab.ca> CC: Andy Green <andy@...mcat.com>, Linux USB list <linux-usb@...r.kernel.org>, lkml <linux-kernel@...r.kernel.org>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Arnd Bergmann <arnd@...db.de>, Greg Kroah-Hartman <gregkh@...e.de> Subject: Re: RFC: Platform data for onboard USB assets On 03/11/2011 10:45 PM, Somebody in the thread at some point said: > On Fri, Mar 11, 2011 at 2:50 AM, Andy Green<andy@...mcat.com> wrote: >> Hi - >> >> platform_data is a well established way in Linux to pass configuration data >> up to on-board assets from a machine file like mach-xyz.c. It's also >> supported to pass platform_data up to devices that are probed asynchronously >> from busses like i2c as well, which is very handy. >> >> However AFAIK it's not possible to bind platform_data to probed USB devices >> as it stands. > > Oh, please no. > > platform_data is an ugly non-type-checked anonymous pointer. If you > need to pass data to a driver, use something better designed. A > device tree fragment would work, or provide some kind of query api. > platform_data is definitely the wrong approach. $ grep platform_data drivers/* -R | wc -l 2110 -Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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