[lkml]   [2011]   [Feb]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH v2 13/13] tty: pruss SUART driver
    On Tue, Feb 22, 2011 at 02:12:32PM +0530, Subhasish Ghosh wrote:
    > Hello,
    > I had kept separate files to affirm the modularity and ease of
    > portability of the system.
    > There are three different interfaces,
    > 1. The Linux driver interface
    > 2. The PRU control interface
    > 3. The McASP serializer interface.
    > To maintain modularity, I had classified the files respectively as :
    > 1. pruss_suart.c
    > 2. pruss_suart_api.c
    > 3. pruss_suart_utils.c
    > This is not a single device which can be expressed as a single file,
    > but functionally different devices logically cascaded together to
    > work in unison.
    > We use the PRU for packet processing, but the actual data is
    > transmitted/received through the
    > McASP, which we use as a serializer.
    > I feel to combine these disparate functionalities into a single file
    > will not
    > 1. Help better understanding the device. I mean, why should a TTY
    > UART driver be aware of the McASP or the PRU.
    > 2. In case of a bug in the API layer or McASP, the driver need not
    > be touched, thus improve maintainability.
    > 3. If we need to port it to another Linux version, just editing the
    > driver file should suffice, this will reduce bugs while porting.

    If your code is in the kernel tree, you do not need to ever port it to a
    new version, as it will happen automatically as new kernels are
    released, so this really isn't anything to worry about.

    > To me, combining all of these into a single file only creates a
    > mess. This is the reason I had separated them into different files!!
    > I don't understand why should it be better to have all of these into
    > a single file.

    As Alan stated, just use 3 files in the directory with the other
    drivers, you don't need a subdir for something small like this.


    greg k-h

     \ /
      Last update: 2011-02-22 15:47    [W:0.021 / U:8.868 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site