Re: [PATCH v4 2/2] i2c: add ACPI support for I2C mux ports

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, Oct 22, 2015 at 02:17:42AM -0700, Dustin Byford wrote:
> Although I2C mux devices are easily enumerated using ACPI (_HID/_CID or
> device property compatible string match), enumerating I2C client devices
> connected through an I2C mux needs a little extra work.
> 
> This change implements a method for describing an I2C device hierarchy that
> includes mux devices by using an ACPI Device() for each mux channel along
> with an _ADR to set the channel number for the device.  See
> Documentation/acpi/i2c-muxes.txt for a simple example.
> 
> To make this work the ismt, i801, and designware pci/platform devs now
> share an ACPI companion with their I2C adapter dev similar to how it's done
> in OF.  This is done on the assumption that power management functions will
> not be called directly on the I2C dev that is sharing the ACPI node.
> 
> Signed-off-by: Dustin Byford <dustin@xxxxxxxxxxxxxxxxxxx>

This looks good to me.

You did also some stylistic changes to the drivers in question which I
think should be placed to a separate patches.

Regardless of that,

Acked-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>

I'll leave this up to Rafael and Wolfram to decide how to go forward
with this patch.
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux IBM ACPI]     [Linux Power Management]     [Linux Kernel]     [Linux Laptop]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

  Powered by Linux