Date: Wed, 24 May 2006 14:39:57 +0400 From: "Yuriy Tsibizov" <Yuriy.Tsibizov@gfk.ru> To: "Warner Losh" <imp@bsdimp.com>, <scottl@samsco.org> Cc: freebsd-multimedia@FreeBSD.org, des@des.no, freebsd-current@FreeBSD.org, Alexander@Leidinger.net Subject: RE: Call for testing: emu10kx driver for Creative sound cards Message-ID: <D6B2C454E5A77B4D8DA0B863D3D6D492CC3458@demon.hhp.local>
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> + .Pp > + Sysctl nodes provided by drivers should not be considered to be > + permanant unless they are documented in the driver's man page. > + Names which start with _ denote a tree or node which is considered > + impermanant and should not be relied up by code elsewhere in the > + system. > + Driver writers should use the sysctl infrastructure provided by > + .Xr device_get_sysctl_ctx 9=20 > + and > + .Xr device_get_sysctl_tree 9 > + for their sysctls. > + Drivers should migrate from past interfaces to this new=20 > interface, but > + provide, where needed, backwards compatibility shims. > + These facilities export the sysctl as=20 > dev.<driver-name>.<unit>.attribute. Should sound drivers (pcm* device) be documented as an exception from = this?=20 They use snd_sysctl_tree_top() to get tree OID under hw.snd.pcmX and=20 snd_sysctl_tree() to get their context. Yuriy.
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