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firmware: xilinx: Add sysfs to set shutdown scope

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The Linux shutdown functionality implemented via PSCI system_off does
not include an option to set a scope, i.e. which parts of the system to
shut down.

This patch creates sysfs that allows to set the shutdown scope for the
next shutdown request. When the next shutdown is performed, the platform
specific portion of PSCI-system_off can use the chosen shutdown scope.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Stefan Krsmanovic <stefan.krsmanovic@aggios.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Link: https://lore.kernel.org/r/1587761887-4279-25-git-send-email-jolly.shah@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rajan Vaja
2020-04-24 13:58:06 -07:00
committed by Greg Kroah-Hartman
parent fdd2ed88ca
commit b3ae24c448
3 changed files with 141 additions and 1 deletions
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12
include/linux/firmware/xlnx-zynqmp.h
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@@ -286,6 +286,18 @@ enum dll_reset_type {
PM_DLL_RESET_PULSE,
};
enum zynqmp_pm_shutdown_type {
ZYNQMP_PM_SHUTDOWN_TYPE_SHUTDOWN,
ZYNQMP_PM_SHUTDOWN_TYPE_RESET,
ZYNQMP_PM_SHUTDOWN_TYPE_SETSCOPE_ONLY,
};
enum zynqmp_pm_shutdown_subtype {
ZYNQMP_PM_SHUTDOWN_SUBTYPE_SUBSYSTEM,
ZYNQMP_PM_SHUTDOWN_SUBTYPE_PS_ONLY,
ZYNQMP_PM_SHUTDOWN_SUBTYPE_SYSTEM,
};
/**
* struct zynqmp_pm_query_data - PM query data
* @qid: query ID