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| author |   Tejas Patel <tejas.patel@xilinx.com> | 2019-08-26 13:30:44 -0700 |
|---|---|---|
| committer |   Michal Simek <michal.simek@xilinx.com> | 2019-10-16 12:49:41 +0200 |
| commit | e502ff8606b32df4f9f2435ab00278312db125b3 (patch) | |
| tree | c2019d68a6aa152f04c0a92f9659f059d7fa182b /include/linux/firmware | |
| parent | Linux 5.4-rc1 (diff) | |
| download | linux-dev-e502ff8606b32df4f9f2435ab00278312db125b3.tar.xz linux-dev-e502ff8606b32df4f9f2435ab00278312db125b3.zip | |
soc: xilinx: Set CAP_UNUSABLE requirement for versal while powering down domain
For "0" requirement which is used to inform firmware that device is
not required currently by master, Versal PLM (Platform Loader and
Manager) which runs on Platform Management Controller and is responsible
platform management of devices that disables clock, power it down
and reset the device. genpd_power_off() is being called during runtime
suspend also. So, if any device goes to runtime suspend state during
resumes it needs to be re-initialized again. It is possible that
drivers do not reinitialize device upon resume from runtime suspend
every time ans so dont want it to be powered down or get reset
during runtime suspend.
In Versal PLM new PM_CAP_UNUSABLE capability is added, which disables
clock only and avoids power down and reset during runtime suspend. Power
and reset will be gated with core suspend.So, this patch sets
CAPABILITY_UNUSABLE requirement during gpd_power_off()
if platform is other than zynqmp.
Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'include/linux/firmware')
| -rw-r--r-- | include/linux/firmware/xlnx-zynqmp.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h index 778abbbc7d94..adb14bcedca2 100644 --- a/include/linux/firmware/xlnx-zynqmp.h +++ b/include/linux/firmware/xlnx-zynqmp.h @@ -2,7 +2,7 @@ /* * Xilinx Zynq MPSoC Firmware layer * - * Copyright (C) 2014-2018 Xilinx + * Copyright (C) 2014-2019 Xilinx * * Michal Simek <michal.simek@xilinx.com> * Davorin Mista <davorin.mista@aggios.com> @@ -46,6 +46,7 @@ #define ZYNQMP_PM_CAPABILITY_ACCESS 0x1U #define ZYNQMP_PM_CAPABILITY_CONTEXT 0x2U #define ZYNQMP_PM_CAPABILITY_WAKEUP 0x4U +#define ZYNQMP_PM_CAPABILITY_UNUSABLE 0x8U /* * Firmware FPGA Manager flags |