Re: [PATCH v4 1/5] mfd: Add support for Intel LJCA device

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On Thu, Mar 09, 2023 at 10:26:27AM +0100, Greg Kroah-Hartman wrote:
> On Thu, Mar 09, 2023 at 05:10:48PM +0800, Ye, Xiang wrote:
> > Hi Greg,
> > 
> > Thanks for the review.
> > On Thu, Mar 09, 2023 at 08:49:33AM +0100, Greg Kroah-Hartman wrote:
> > > On Thu, Mar 09, 2023 at 03:10:56PM +0800, Ye Xiang wrote:
> > > > This patch implements the USB part of Intel USB-I2C/GPIO/SPI adapter
> > > > device named "La Jolla Cove Adapter" (LJCA).
> > > 
> > > Then why is this called "mfd" in the subject line?
> > Sorry, it's a mistake. I forget to change mfd to usb in the commit message
> > because I just move the ljca.c from driver/mfd to drivers/usb/misc according
> > to previous review comments[1]. And I will address this on v5.
> > 
> > [1] https://www.spinics.net/lists/kernel/msg4708451.html
> > > 
> > > >  include/linux/mfd/ljca.h  |  95 ++++
> > > 
> > > Why is this .h file in the mfd directory?
> > It's a mistake as well. Will address it by moving include/linux/mfd/ljca.h
> > to include/linux/usb/ljca.h.
> 
> Why do you need a .h file at all for such a tiny .c file?  If you don't
> need it, don't have one please.
The ljca.h file is needed because there are three function driver in
this series (LJCA-SPI, LJCA-GPIO, and LJCA-I2C) which needs LJCA API
to do actual transfers. LJCA-USB can be considered as a transport driver,
and the other three function driver use LJCA API to transfer their own
packages.

--
Thanks
Ye Xiang



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