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[U-Boot,v2,0/7] arm: k3: Allow for exclusive and shared device requests

Message ID 20190522043224.14986-1-lokeshvutla@ti.com
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Series arm: k3: Allow for exclusive and shared device requests | expand

Message

Lokesh Vutla May 22, 2019, 4:32 a.m. UTC 
Sysfw provides an option for requesting exclusive access for a
device using the flags MSG_FLAG_DEVICE_EXCLUSIVE. If this flag is
not used, the device is meant to be shared across hosts. Once a device
is requested from a host with this flag set, any request to this
device from a different host will be nacked by sysfw.

Current tisci firmware and pm drivers always requests for device with
exclusive permissions set. But this is not be true for certain devices
that are expcted to be shared across different host contexts.
So add support for getting the shared or exclusive permissions from DT
and request firmware accordingly.

Same bindings are acked in kernel: https://patchwork.kernel.org/project/linux-arm-kernel/list/?series=103447

Also this series adds support for shutting down cores so that R5 cores
can be shutdown right after jumping to ATF.

Changes since v2:
- Dropped patch 8.

Andreas Dannenberg (2):
  firmware: ti_sci: Add processor shutdown API method
  armv7R: K3: am654: Shut down R5 core after ATF startup on A53

Lokesh Vutla (5):
  firmware: ti_sci: Allow for device shared and exclusive requests
  power-domain: Add private data to power domain
  dt-bindings: ti_sci_pm_domains: Add support for exclusive and shared
    access
  power: domain: ti_sci_power_domains: Add support for exclusive and
    shared access
  armv7R: dts: k3-am654: Update power-domains property for each node

 arch/arm/dts/k3-am65-wakeup.dtsi              |   2 +-
 arch/arm/dts/k3-am65.dtsi                     |   1 +
 arch/arm/dts/k3-am654-base-board-u-boot.dtsi  |   2 +-
 arch/arm/dts/k3-am654-ddr.dtsi                |   4 +-
 arch/arm/dts/k3-am654-r5-base-board.dts       |   8 +-
 arch/arm/mach-k3/am6_init.c                   |  62 +++++
 arch/arm/mach-k3/common.c                     |   6 +-
 arch/arm/mach-k3/include/mach/sys_proto.h     |   1 +
 .../power/ti,sci-pm-domain.txt                |  11 +-
 drivers/firmware/ti_sci.c                     | 216 +++++++++++++++++-
 drivers/firmware/ti_sci.h                     |  50 ++++
 drivers/power/domain/ti-sci-power-domain.c    |  31 ++-
 include/dt-bindings/soc/ti,sci_pm_domain.h    |   9 +
 include/linux/soc/ti/ti_sci_protocol.h        |   7 +
 include/power-domain.h                        |  15 +-
 15 files changed, 393 insertions(+), 32 deletions(-)
 create mode 100644 include/dt-bindings/soc/ti,sci_pm_domain.h