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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2015-05-26 17:10:32 +0100
committerLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2015-10-02 14:35:17 +0100
commita5c00bb28da0bb34f901d090839fc448246aa996 (patch)
tree2588a66ac9d6d872e3e3dabd2c0ecc629a537dea /include/uapi
parent5f004e0c9fb152a080b47d06dc48bdd29765a734 (diff)
downloadop-kernel-dev-a5c00bb28da0bb34f901d090839fc448246aa996.zip
op-kernel-dev-a5c00bb28da0bb34f901d090839fc448246aa996.tar.gz
drivers: firmware: psci: add extended stateid power_state support
PSCI v1.0 augmented the power_state parameter format specification (extended stateid) and introduced a way to probe it through the PSCI_FEATURES interface. This patch implements code that detects the power_state format at run-time through the PSCI_FEATURES interface, so that the power_state argument can be properly detected and validated in the kernel according to the information provided through firmware. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Tested-by: Jisheng Zhang <jszhang@marvell.com> Cc: Mark Rutland <mark.rutland@arm.com>
Diffstat (limited to 'include/uapi')
-rw-r--r--include/uapi/linux/psci.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/uapi/linux/psci.h b/include/uapi/linux/psci.h
index 187b828d..0a9485f 100644
--- a/include/uapi/linux/psci.h
+++ b/include/uapi/linux/psci.h
@@ -58,6 +58,13 @@
#define PSCI_0_2_POWER_STATE_AFFL_MASK \
(0x3 << PSCI_0_2_POWER_STATE_AFFL_SHIFT)
+/* PSCI extended power state encoding for CPU_SUSPEND function */
+#define PSCI_1_0_EXT_POWER_STATE_ID_MASK 0xfffffff
+#define PSCI_1_0_EXT_POWER_STATE_ID_SHIFT 0
+#define PSCI_1_0_EXT_POWER_STATE_TYPE_SHIFT 30
+#define PSCI_1_0_EXT_POWER_STATE_TYPE_MASK \
+ (0x1 << PSCI_1_0_EXT_POWER_STATE_TYPE_SHIFT)
+
/* PSCI v0.2 affinity level state returned by AFFINITY_INFO */
#define PSCI_0_2_AFFINITY_LEVEL_ON 0
#define PSCI_0_2_AFFINITY_LEVEL_OFF 1
@@ -78,6 +85,11 @@
#define PSCI_VERSION_MINOR(ver) \
((ver) & PSCI_VERSION_MINOR_MASK)
+/* PSCI features decoding (>=1.0) */
+#define PSCI_1_0_FEATURES_CPU_SUSPEND_PF_SHIFT 1
+#define PSCI_1_0_FEATURES_CPU_SUSPEND_PF_MASK \
+ (0x1 << PSCI_1_0_FEATURES_CPU_SUSPEND_PF_SHIFT)
+
/* PSCI return values (inclusive of all PSCI versions) */
#define PSCI_RET_SUCCESS 0
#define PSCI_RET_NOT_SUPPORTED -1
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