src/sys/modules/i2c/controllers, branch releng/12.2

MFC r350303: enable ig4_acpi on aarch64

2019-09-16T12:54:44Z

The already-listed APMC0D0F ID belongs to the Ampere eMAG aarch64 platform, but ACPI support was not even built on aarch64. Submitted by: Greg V

imcsmb(4): Intel integrated Memory Controller (iMC) SMBus controller driver

2018-03-03T01:53:51Z

imcsmb(4) provides smbus(4) support for the SMBus controller functionality in the integrated Memory Controllers (iMCs) embedded in Intel Sandybridge- Xeon, Ivybridge-Xeon, Haswell-Xeon, and Broadwell-Xeon CPUs. Each CPU implements one or more iMCs, depending on the number of cores; each iMC implements two SMBus controllers (iMC-SMBs). *** IMPORTANT NOTE *** Because motherboard firmware or the BMC might try to use the iMC-SMBs for monitoring DIMM temperatures and/or managing an NVDIMM, the driver might need to temporarily disable those functions, or take a hardware interlock, before using the iMC-SMBs. Details on how to do this may vary from board to board, and the procedure may be proprietary. It is strongly suggested that anyone wishing to use this driver contact their motherboard vendor, and modify the driver as described in the manual page and in the driver itself. (For what it's worth, the driver as-is has been tested on various SuperMicro motherboards.) Reviewed by: avg, jhb MFC after: 1 week Relnotes: yes Sponsored by: Panasas Differential Revision: https://reviews.freebsd.org/D14447 Discussed with: avg, ian, jhb Tested by: allanjude (previous version), Panasas

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

2017-03-04T10:10:17Z

This simplifies make output/logic Tested with: `cd sys/modules; make ALL_MODULES=` on amd64 MFC after: 1 month Sponsored by: Dell EMC Isilon

Remove pc98 support completely.

2017-01-28T02:22:15Z

I thank all developers and contributors for pc98. Relnotes: yes

[ig4] Add ACPI platform support for ig4 driver

2016-12-26T22:13:43Z

Add ACPI part for ig4 driver to make it work on Intel BayTrail SoC where ig4 device is available only through ACPI Reviewed by: avg MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D8742

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

2016-10-30T12:15:33Z

Summary: The hardware does not expose a classic SMBus interface. Instead it has a lower level interface that can express a far richer I2C protocol than what smbus offers. However, the interface does not provide a way to explicitly generate the I2C stop and start conditions. It's only possible to request that the stop condition is generated after transferring the next byte in either direction. So, at least one data byte must always be transferred. Thus, some I2C sequences are impossible to generate, e.g., an equivalent of smbus quick command (---). At the same time isl(4) and cyapa(4) are moved to iicbus and now they use iicbus_transfer for communication. Previously they used smbus_trans() interface that is not defined by the SMBus protocol and was implemented only by ig4(4). In fact, that interface was impossible to implement for the typical SMBus controllers like intpm(4) or ichsmb(4) where a 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 slave addresses (shifted by 1 bit to the left). The method expects 7-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 use and a slave address on it. On Chromebook hardware where isl and cyapa devices are commonly found it is also possible to use a new chromebook_platform(4) driver that automatically configures isl and cyapa devices. There is no need to provide 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, imp Reviewed by: wblock (docs) MFC after: 1 month Relnotes: yes Differential Revision: https://reviews.freebsd.org/D8172

ig4 - Intel fourth gen integrated I2C SMBus driver.

2015-05-30T12:17:18Z

Differential Revision: https://reviews.freebsd.org/D2372 Reviewed by: jhb, wblock, adrian Approved by: jhb, wblock Relnotes: yes

Move all the power management (SMBus) drivers to their own directory,

2014-09-23T06:31:15Z

away from sys/pci.

Move amdsmb and nfsmb from dev/pci to their own device directory.

2014-09-23T05:54:18Z

Add ismt(4) driver.

2014-05-20T19:55:06Z

ismt(4) supports the SMBus Message Transport controller found on Intel C2000 series (Avoton) and S1200 series (Briarwood) Atom SoCs. Sponsored by: Intel