lkml.org 
[lkml]   [2015]   [Jan]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Subject[PATCH 0/3] drivers: soc: ti: Introduce wkup_m3_ipc driver
    Date
    This series introduces a wkup_m3_ipc driver to handle communication
    between the MPU and Cortex M3 present on TI AM335x SoCs. This is
    required for much of the PM functionality for AM335x including suspend
    support. This was split off from v4 of the am335x suspend series,
    discussion that led to the implementation of this driver can be found
    with the series here [1]. A previous RFC version of this series can be
    found here [2]. The changes from that version are as follows:
    - Remove wake source reporting as it is unnecessary.
    - Use newly introduced rproc_get_by_phandle API to get rproc for
    booting [3].

    This series depends on the patch "remoteproc: Introduce
    rproc_get_by_phandle API" [3] and the wkup_m3_rproc series found
    here [4]. A branch based on 3.19-rc1 containing this series and
    all dependencies for the AM33xx suspend series can be found
    here [5] for a high level view of what I am using this for.

    A small API is exposed to allow the SoC PM code to execute the
    specific tasks it needs to in order to enter and exit low power
    modes. Communication works the same as it did in the past using the
    IPC registers found within the control module, a mailbox module, and
    an interrupt coming back from the CM3. All of that, including the
    configurations needed for different low power tasks is encapsulated
    within this driver.

    Regards,
    Dave

    [1] http://www.spinics.net/lists/linux-omap/msg109331.html
    [2] http://www.spinics.net/lists/linux-omap/msg113372.html
    [3] http://marc.info/?l=linux-kernel&m=142022798923784&w=2
    [4] https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg795457.html
    [5] https://github.com/dgerlach/linux-pm/tree/pm-am335x-v3.19-rc1

    Dave Gerlach (3):
    Documentation: dt: add ti,am3353-wkup-m3-ipc bindings
    soc: ti: Add wkup_m3_ipc driver
    ARM: dts: am33xx: Add wkup_m3_ipc node

    .../devicetree/bindings/soc/ti/wkup_m3_ipc.txt | 41 ++
    arch/arm/boot/dts/am33xx.dtsi | 9 +
    drivers/soc/ti/Kconfig | 11 +
    drivers/soc/ti/Makefile | 1 +
    drivers/soc/ti/wkup_m3_ipc.c | 451 +++++++++++++++++++++
    include/linux/wkup_m3_ipc.h | 33 ++
    6 files changed, 546 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/soc/ti/wkup_m3_ipc.txt
    create mode 100644 drivers/soc/ti/wkup_m3_ipc.c
    create mode 100644 include/linux/wkup_m3_ipc.h

    --
    2.1.0



    \
     
     \ /
      Last update: 2015-01-02 21:21    [W:4.789 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site