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. Changes since v4: https://patchwork.kernel.org/project/linux-arm-kernel/list/?series=148371 - Split the driver and arch changes into a separate series. - Added Reviewed-by from Nishanth M - Rebased on top of v5.3-rc2 Lokesh Vutla (3): firmware: ti_sci: Allow for device shared and exclusive requests dt-bindings: ti_sci_pm_domains: Add support for exclusive and shared access soc: ti: ti_sci_pm_domains: Add support for exclusive and shared access .../bindings/soc/ti/sci-pm-domain.txt | 11 ++++- MAINTAINERS | 1 + drivers/firmware/ti_sci.c | 45 ++++++++++++++++++- drivers/soc/ti/ti_sci_pm_domains.c | 23 +++++++++- include/dt-bindings/soc/ti,sci_pm_domain.h | 9 ++++ include/linux/soc/ti/ti_sci_protocol.h | 3 ++ 6 files changed, 86 insertions(+), 6 deletions(-) create mode 100644 include/dt-bindings/soc/ti,sci_pm_domain.h -- 2.21.0
