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drivers: firmware: psci: Announce support for OS initiated suspend mode

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PSCI firmware v1.0+, supports two different modes for CPU_SUSPEND.
The Platform Coordinated mode, which is the default and mandatory
mode, while support for the OS initiated (OSI) mode is optional.

In some cases it's interesting for the user/developer to know if
the OSI mode is supported by the PSCI FW, so print a message to
the log if that is the case.

Co-developed-by: Lina Iyer <lina.iyer@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ulf Hansson 2019-04-10 10:20:25 +02:00 • committed by Rafael J. Wysocki
parent d036b5cfef
commit 60dd1ead65
2 changed files with 25 additions and 1 deletions
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5
include/uapi/linux/psci.h
View file

@ -49,6 +49,7 @@
#define PSCI_1_0_FN_PSCI_FEATURES PSCI_0_2_FN(10)
#define PSCI_1_0_FN_SYSTEM_SUSPEND PSCI_0_2_FN(14)
#define PSCI_1_0_FN_SET_SUSPEND_MODE PSCI_0_2_FN(15)
#define PSCI_1_0_FN64_SYSTEM_SUSPEND PSCI_0_2_FN64(14)
@ -97,6 +98,10 @@
#define PSCI_1_0_FEATURES_CPU_SUSPEND_PF_MASK \
(0x1 << PSCI_1_0_FEATURES_CPU_SUSPEND_PF_SHIFT)
#define PSCI_1_0_OS_INITIATED BIT(0)
#define PSCI_1_0_SUSPEND_MODE_PC 0
#define PSCI_1_0_SUSPEND_MODE_OSI 1
/* PSCI return values (inclusive of all PSCI versions) */
#define PSCI_RET_SUCCESS 0
#define PSCI_RET_NOT_SUPPORTED -1