Changes in Makefile

e9ac41698b2f322d55ccf9da50a3596edb2c1800 - Remove residual blank line at start of Makefile

Mon, 15 Jul 2024 06:46:32 +0200

Remove residual blank line at start of MakefileThis is a residual of the $FreeBSD$ removal.MFC After: 3 days (though I'll just run the command on the branches)Sponsored by: Netflix List of files: /freebsd/sys/modules/chromebook_platform/Makefile

031beb4e239bfce798af17f5fe8dba8bcaf13d99 - sys: Remove $FreeBSD$: one-line sh pattern

Wed, 16 Aug 2023 19:54:58 +0200

sys: Remove $FreeBSD$: one-line sh patternRemove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/ List of files: /freebsd/sys/modules/chromebook_platform/Makefile

193d9e768ba63fcfb187cfd17f461f7d41345048 - sys/modules: normalize .CURDIR-relative paths to SRCTOP

Sat, 04 Mar 2017 11:10:17 +0100

sys/modules: normalize .CURDIR-relative paths to SRCTOPThis simplifies make output/logicTested with: `cd sys/modules; make ALL_MODULES=` on amd64MFC after: 1 monthSponsored by: Dell EMC Isilon List of files: /freebsd/sys/modules/chromebook_platform/Makefile

02ebdc78239c4e929e42896931a4f04526e04440 - Merge ^/head r307736 through r308146.

Mon, 31 Oct 2016 20:02:42 +0100

Merge ^/head r307736 through r308146. List of files: /freebsd/sys/modules/chromebook_platform/Makefile

448897d366c218f9fd6208427eef1e6dd51f78d0 - add iic interface to ig4 driver, move isl and cyapa to iicbus

Sun, 30 Oct 2016 13:15:33 +0100

add iic interface to ig4 driver, move isl and cyapa to iicbusSummary:The hardware does not expose a classic SMBus interface.Instead it has a lower level interface that can express a far richerI2C protocol than what smbus offers. However, the interface does notprovide a way to explicitly generate the I2C stop and start conditions.It's only possible to request that the stop condition is generatedafter transferring the next byte in either direction. So, at leastone data byte must always be transferred.Thus, some I2C sequences are impossible to generate, e.g., an equivalentof smbus quick command (---).At the same time isl(4) and cyapa(4) are moved to iicbus and now they useiicbus_transfer for communication. Previously they used smbus_trans()interface that is not defined by the SMBus protocol and was implementedonly by ig4(4). In fact, that interface was impossible to implementfor the typical SMBus controllers like intpm(4) or ichsmb(4) wherea type of the SMBus command must be programmed.The plan is to remove smbus_trans() and all its uses.As an aside, the smbus_trans() method deviates from the standard,but perhaps backwards, FreeBSD convention of using 8-bit slaveaddresses (shifted by 1 bit to the left). The method expects7-bit addresses.There is a user facing consequence of this change.A user must now provide device hints for isl and cyapa that specify an iicbus to useand a slave address on it.On Chromebook hardware where isl and cyapa devices are commonly foundit is also possible to use a new chromebook_platform(4) driver thatautomatically configures isl and cyapa devices. There is no need toprovide the device hints in that case,Right now smbus(4) driver tries to discover all slaves on the bus.That is very dangerous. Fortunately, the probing code uses smbus_trans()to do its job, so it is really enabled for ig4 only.The plan is to remove that auto-probing code and smbus_trans().Tested by: grembo, Matthias Apitz (w/o chromebook_platform)Discussed with: grembo, impReviewed by: wblock (docs)MFC after: 1 monthRelnotes: yesDifferential Revision: https://reviews.freebsd.org/D8172 List of files: /freebsd/sys/modules/chromebook_platform/Makefile