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@xxxxxxxxxxxxxxx/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 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
