History log of /freebsd/sys/compat/linuxkpi/common/include/linux/i2c.h (Results 1 – 3 of 3)
Revision (<<< Hide revision tags) (Show revision tags >>>) Date Author Comments
Revision tags: release/14.0.0, release/13.2.0
# 83276e1f 08-Feb-2023 Jean-Sébastien Pédron <dumbbell@FreeBSD.org>

linuxkpi: Add `i2c_adapter_quirks` support

While here, also declare `I2C_CLASS_HWMON`.

Reviewed by: manu
Approved by: manu
Differential Revision: https://reviews.freebsd.org/D38535


Revision tags: release/12.4.0
# 63641805 18-Aug-2022 Emmanuel Vadot <manu@FreeBSD.org>

linuxkpi: unbreak linux_i2cbb

This is a joint work with manu.

- fixed conditions in do_i2c_transfer and i2c_transfer as linux_i2cbb
does not set adapter->algo->master_xfer but does set
adapter-

linuxkpi: unbreak linux_i2cbb

This is a joint work with manu.

- fixed conditions in do_i2c_transfer and i2c_transfer as linux_i2cbb
does not set adapter->algo->master_xfer but does set
adapter->algo_data;
- fixed parent bus specification for linux_i2cbb driver module;
- actually implemented iicbb_transfer method;
- added iicbb_pre_xfer and iicbb_post_xfer methods;
- removed unnecessary and harmful delays (and other extra logic) from
iicbb methods as iicbb driver already has them;
- added setting of iicbb speed based on algo_data->udelay, so that iicbb
uses correct delays;

PR: 265920
Fixes: 1961a14a4743 linuxkpi: Add i2c support
MFC after: 2 weeks
Sponsored by: Beckhoff Automation GmbH & Co. KG (manu's work)

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Revision tags: release/13.1.0, release/12.3.0
# 1961a14a 04-Nov-2021 Emmanuel Vadot <manu@FreeBSD.org>

linuxkpi: Add i2c support

Add i2c support to linuxkpi. This is needed by drm-kmod.
For every i2c_adapter added by i2c_add_adapter we add a child to the
device named "lkpi_iic". This child handle the

linuxkpi: Add i2c support

Add i2c support to linuxkpi. This is needed by drm-kmod.
For every i2c_adapter added by i2c_add_adapter we add a child to the
device named "lkpi_iic". This child handle the conversion between
Linux i2c_msgs to FreeBSD iic_msgs.
For every i2c_adapter added by i2c_bit_add_bus we add a child to the
device named "lkpi_iicbb". This child handle the conversion between
Linux i2c_msgs to FreeBSD iic_msgs.
With the help of iic(4), this expose the i2c controller to userspace
allowing a user to query DDC information from a monitor.
e.g.: i2c -f /dev/iic0 -a 0x28 -c 128 -d r
will query the standard EDID from the monitor if plugged.

The bitbang part (lkpi_iicbb) isn't tested at all for now as I don't have
compatible hardware (all my hardware have native i2c controller).

Tested on: Intel (SandyBridge, Skylake, ApolloLake)
Tested on: AMD (Picasso, Polaris (amd64 and arm64))

MFC after: 1 month
Reviewed by: hselasky
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D33053

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