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 v3: https://patchwork.kernel.org/project/linux-arm-kernel/list/?series=103447 - Rebased on top of v5.3-rc1 - Updated power-domain cells for j721e. - Mark the console uart as shared in am65x-base-board - Added Reviewed-by from Rob Lokesh Vutla (5): 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 arm64: dts: ti: k3-am654: Update the power domain cells arm64: dts: ti: k3-j721e: Update the power domain cells .../bindings/soc/ti/sci-pm-domain.txt | 11 ++++- MAINTAINERS | 1 + arch/arm64/boot/dts/ti/k3-am65-main.dtsi | 44 +++++++++--------- arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi | 10 ++--- arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi | 6 +-- arch/arm64/boot/dts/ti/k3-am65.dtsi | 1 + .../arm64/boot/dts/ti/k3-am654-base-board.dts | 1 + .../dts/ti/k3-j721e-common-proc-board.dts | 4 ++ arch/arm64/boot/dts/ti/k3-j721e-main.dtsi | 20 ++++----- .../boot/dts/ti/k3-j721e-mcu-wakeup.dtsi | 6 +-- arch/arm64/boot/dts/ti/k3-j721e.dtsi | 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 ++ 15 files changed, 136 insertions(+), 49 deletions(-) create mode 100644 include/dt-bindings/soc/ti,sci_pm_domain.h -- 2.21.0
