Sorry, haven't had the chance yet. I'll try to do this and hopefully send v3 of the patch by the end of this week
On Mon, Jan 6, 2014 at 11:14 PM, Dmitry Torokhov <dmitry.torok...@gmail.com> wrote: > On Fri, Jan 03, 2014 at 09:41:33PM -0800, Dmitry Torokhov wrote: >> On Fri, Jan 03, 2014 at 09:03:11PM -0800, Andrey Smirnov wrote: >> > On Fri, Jan 3, 2014 at 8:44 PM, Dmitry Torokhov >> > <dmitry.torok...@gmail.com> wrote: >> > > On Fri, Jan 03, 2014 at 08:24:17PM -0800, Andrey Smirnov wrote: >> > >> On Fri, Jan 3, 2014 at 5:39 PM, Dmitry Torokhov >> > >> <dmitry.torok...@gmail.com> 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. >> > >> > * The "pcu" structure is allocated with kmalloc which doesn't give any >> > guarantees about address alignment. >> > * I am not sure if the cmd_buf field in that structure is aligned, and >> > even if it is, any future changes to that structure may shift its >> > offset. >> > * Also even if the data we are interested in is aligned on 2-byte >> > border, I think all those architectures require 4-byte border >> > alignment. >> >> As far as I know word access only requires word alignment. Please see >> the other patch I just posted that adds alignment check in balcklight >> handling code. > > Andrey, were you able to test the patch? > > Thanks. > > -- > Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
