[U-Boot] [PATCH v3 0/9] arm: k3: Allow for exclusive and shared device requests
Lokesh Vutla
lokeshvutla at ti.com
Fri Jun 7 13:54:38 UTC 2019
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:
- Added support for releasing exclusive devices before shutdown
- Rebased on top of AM65x EEPROM support:
https://patchwork.ozlabs.org/project/uboot/list/?series=111847
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 (7):
firmware: ti_sci: Allow for device shared and exclusive requests
firmware: ti_sci: Add a command for releasing all exclusive devices
armv7R: k3: Release all the exclusive devices
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
arm: dts: k3-am654: Update power-domains property for each node
arch/arm/dts/k3-am65-main.dtsi | 10 +-
arch/arm/dts/k3-am65-mcu.dtsi | 2 +-
arch/arm/dts/k3-am65-wakeup.dtsi | 4 +-
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 | 10 +-
arch/arm/mach-k3/include/mach/sys_proto.h | 2 +-
.../power/ti,sci-pm-domain.txt | 11 +-
drivers/firmware/ti_sci.c | 291 +++++++++++++++++-
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 | 11 +
include/power-domain.h | 15 +-
17 files changed, 483 insertions(+), 40 deletions(-)
create mode 100644 include/dt-bindings/soc/ti,sci_pm_domain.h
--
2.21.0
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