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Date:	Fri, 3 Jan 2014 20:44:33 -0800
From:	Dmitry Torokhov <>
To:	Andrey Smirnov <>
Subject: Re: [PATCH v2] ims-pcu: Add commands supported by the new version of
 the FW

On Fri, Jan 03, 2014 at 08:24:17PM -0800, Andrey Smirnov wrote:
> On Fri, Jan 3, 2014 at 5:39 PM, Dmitry Torokhov
> <> wrote:
> > Hi Andrey,
> >
> > On Wed, Jan 01, 2014 at 04:47:01PM -0800, Andrey Smirnov wrote:
> >> New version of the PCU firmware supports two new commands:
> >>   - IMS_PCU_CMD_OFN_SET_CONFIG which allows to write data to the
> >>   registers of one finger navigation(OFN) chip present on the device
> >>   - IMS_PCU_CMD_OFN_GET_CONFIG which allows to read data form the
> >>   registers of said chip.
> >>
> >> This commit adds two helper functions to use those commands and sysfs
> >> attributes to use them. It also exposes some OFN configuration
> >> parameters via sysfs.
> >
> > Thank you for making the changes. I do not still quite like the games we
> > play with the OFN attributes, how about the patch below (on top of
> > yours)?
> >
> Yeah, I agree I like it the "two separate sysfs groups" group approach
> better. The only small nitpick about your patch is that I think we
> should use "get_unaligned_le16" instead of "le16_to_cpup"(In case
> anyone decides to run the driver on SuperH or C6x DSPs from TI :-)).
> Let me test it and if everything works as expected I'll apply you
> patch, convert it to "get_unaligned_le16", squash and send v3 of the
> patch.

Why do we need get_unaligned_le16()? As far as I can see pcu->cmd_buf is
aligned and therefore pcu->cmd_buf[2] is also aligned on word boundary.


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